AHIMA CCS Exam Prep
Free, independent prep for AHIMA's Certified Coding Specialist (CCS) exam. Keep your 2026 code books open, pick one answer, then read the explanation even when you get it right.
23 original, unofficial practice questions
1. Principal diagnosis: contrasting diagnoses
A patient admitted to a short-term acute care hospital in February 2026 is discharged with the final diagnosis "acute cholecystitis versus acute pancreatitis." Both conditions were worked up and treated, and nothing else in the record clarifies which one it was. How are these diagnoses reported?
Answer: D. For this acute care inpatient, comparative or contrasting diagnoses documented as "either/or" or "versus" are both coded as if confirmed, then sequenced by the circumstances of admission. Order of mention doesn't decide sequencing, so C fails. A swaps two documented diagnoses for a symptom the rule doesn't call for. B adds a step the guideline doesn't require; the inpatient rules exist so these cases can be coded.
Source: ICD-10-CM Official Guidelines, FY2026, Section II.D (p. 108).
2. Uncertain diagnosis by setting
In February 2026, an emergency department patient with cough and fever is sent home, not admitted. The physician's final impression: "probable community-acquired pneumonia; chest x-ray read pending; discharged on oral antibiotics." At the time of coding, no final x-ray interpretation or confirmed diagnosis is available. What do you report?
Answer: B. In outpatient settings, including the ED, a diagnosis documented as "probable," "suspected," "questionable" or "rule out" isn't coded. Code what was established: here, the cough and fever. The "code it as if it exists" rule in Section II.H applies to short-term acute care, long-term care and psychiatric hospital admissions, so A borrows the wrong setting's rule, and a prescription doesn't change that. C misuses an observation code for a patient who was treated for symptoms. D: with no confirmed diagnosis in the available record at coding, report the documented symptoms.
Source: ICD-10-CM Official Guidelines, FY2026, Section IV.H (p. 114) and I.C.21.c.6 (pp. 98–99); compare Section II.H (p. 109).
3. Sepsis that develops after admission
A patient is admitted in February 2026 for left lower lobe pneumonia. The attending documents that sepsis and acute kidney injury due to sepsis first developed on day 3 and were not present on admission; no septic shock occurred. Which sequence is correct?
Answer: C. The patient was admitted for a localized infection and sepsis developed later, so the localized infection stays principal and the sepsis codes follow it. Sepsis with an associated acute organ dysfunction is coded as severe sepsis: the systemic infection code, a code from R65.2-, and a code for the organ dysfunction. A would fit an admission for sepsis or severe sepsis with a localized infection when the systemic infection meets the principal-diagnosis definition; those are not this case's facts. B is never allowed, because an R65.2- code can't be principal. D is wrong because severe sepsis that develops during the stay still gets R65.2-, as a secondary diagnosis. These sepsis codes would carry a POA indicator of N.
Source: ICD-10-CM Official Guidelines, FY2026, I.C.1.d.1(a)(iii), I.C.1.d.1(b), I.C.1.d.3–4 (pp. 23–25) and Appendix I (pp. 117–119).
4. The "with" convention
A February 2026 history and physical lists "type 2 diabetes" and "chronic kidney disease, stage 3a" as separate problems. The provider never links them and never says they're unrelated. Which codes apply?
Answer: D. ICD-10-CM presumes a cause-and-effect link between conditions joined by "with" in the Index or Tabular unless the record says they're unrelated or a specific guideline demands an explicit link. Diabetes "with" chronic kidney disease is one of those pairs, so E11.22 applies. Its "use additional code" note then requires the CKD stage, N18.31. A ignores the presumption. C drops the diabetes. B drops the stage the instructional note asks for.
Source: ICD-10-CM Official Guidelines, FY2026, I.A.15 (p. 11) and I.B.7 (p. 13); FY2026 Index and Tabular, Diabetes/type 2/with/chronic kidney disease and the instructional note at E11.22.
5. Present on admission (POA)
In February 2026, a patient waiting in the ED for an inpatient bed falls and fractures the right wrist. The written inpatient admission order is entered two hours later. What POA indicator does the fracture get?
Answer: A. A condition that develops during an outpatient encounter, including time in the ED or in observation, before the written inpatient order is considered present on admission. N would apply only if the fall happened after the order. U means the documentation is insufficient to tell, and W means the provider can't clinically determine the timing. Neither fits a fall with a clear time stamp.
Source: ICD-10-CM Official Guidelines, FY2026, Appendix I, General Reporting Requirements and Assigning the POA Indicator (pp. 117–119).
6. ICD-10-PCS: biopsy followed by definitive surgery
In February 2026, a surgeon performs an excisional biopsy of a left breast mass. The frozen section shows carcinoma, and in the same operative session the surgeon removes all of the left breast. How is this reported in ICD-10-PCS?
Answer: B. A biopsy is coded with the root operation that matches what was done (Excision, Extraction or Drainage) and the qualifier Diagnostic. When a biopsy is followed by a more definitive procedure at the same site, such as a resection, both are coded. A treats the biopsy as an integral step, which this guideline specifically rejects. C leaves out the mastectomy. D picks the wrong root operation: tissue was cut out, not pulled out.
Source: ICD-10-PCS Official Guidelines, 2026, B3.4a and B3.4b (pp. 6–7).
7. ICD-10-PCS: Resection vs. Excision, and approach
In February 2026, using video-assisted thoracoscopic surgery (VATS), a surgeon removes the entire right upper lobe of the lung. One port incision is slightly enlarged to deliver the specimen. Which root operation and approach apply?
Answer: D. ICD-10-PCS gives each lung lobe its own body-part value. Removing all of a body part that has its own value is Resection, not Excision of the larger organ, which rules out A and B. A thoracoscopic procedure is percutaneous endoscopic, and enlarging an incision to remove the specimen doesn't turn it into an open approach, which rules out C.
Source: ICD-10-PCS Official Guidelines, 2026, B3.8 (lobectomy example, p. 8) and B5.2b (p. 16).
8. ICD-10-PCS: clinical wording vs. PCS definitions
A February 2026 operative report is titled "partial hepatectomy." The narrative says the surgeon cut out a wedge of the right lobe of the liver and left the rest of that lobe in place. Which root operation fits?
Answer: B. PCS root operations follow what was actually done, matched to PCS definitions. Excision is cutting out or off a portion of a body part; the right liver lobe has its own body-part value, and only part of it was removed. The guidelines say a coder may correlate "partial resection" with Excision without querying, so D adds an unnecessary query. A follows the title rather than the narrative. C describes pulling or stripping tissue out, which isn't what was documented.
Source: ICD-10-PCS Official Guidelines, 2026, A11 (p. 4) and B3.1a (p. 5); FY2026 PCS tables, Table 0FB.
9. Facility modifiers for discontinued procedures
In February 2026, a Medicare hospital outpatient is prepped and taken into the procedure room for a colonoscopy with planned moderate sedation. Before any anesthesia is administered or the scope is inserted, the physician cancels the procedure because the patient's blood pressure is dangerously high. Which modifier does the facility append?
Answer: A. For Medicare hospital outpatient and ASC reporting, modifier 73 reports a procedure discontinued after the patient was prepared and taken to the room but before anesthesia, and CMS counts moderate sedation as anesthesia for this purpose. Modifier 74 is for discontinuation after anesthesia is induced or the procedure starts. Modifier 53 is a physician modifier and isn't approved for outpatient hospital services. Modifier 52 applies to partial reduction, cancellation or discontinuation of services for which anesthesia is not planned, so it does not fit this case.
Source: Medicare Claims Processing Manual (Pub. 100-04), Chapter 4, §20.6.4, Modifiers 73 and 74 (PDF pp. 61–63; section effective April 1, 2023).
10. NCCI procedure-to-procedure edits
On a Medicare hospital outpatient claim, two procedure codes form an NCCI procedure-to-procedure edit with a modifier indicator of 1. What does the indicator tell you?
Answer: A. Indicator 1 means a modifier is allowed to bypass the edit "under appropriate circumstances." It doesn't create those circumstances. CMS says a modifier may be appended only if the clinical circumstances justify it, never just to get past an edit. B and C turn a conditional permission into automatic billing. D makes payment the decision rule.
Source: NCCI Policy Manual for Medicare, 2026, Chapter I, Section E, p. I-14.
11. Conflicting laterality
A surgeon's February 2026 history and physical documents "left knee osteoarthritis." The same surgeon's operative report describes arthroscopy of the right knee, and the nursing notes say right knee. What should you do before coding?
Answer: C. Laterality can come from other clinicians' notes when the provider is silent, but when the record conflicts about the affected side, the guideline says to query the patient's provider. Coding isn't a majority vote (A), and you can't simply prefer one provider document over another (B). Unspecified laterality (D) is for records that truly can't tell you when clarification isn't possible.
Source: ICD-10-CM Official Guidelines, FY2026, I.B.13 (p. 15).
12. Documentation by clinicians other than the provider
During a February 2026 stay, a dietitian documents a body mass index (BMI) of 42.3. Nowhere does the provider mention obesity or the patient's weight. What's the right approach?
Answer: C. BMI is one of the few values you may take from a clinician other than the provider, but the associated diagnosis, such as obesity, must be documented by the provider. The BMI code requires a provider-documented, reportable associated diagnosis; it doesn't stand alone, so B fails. A and D report a diagnosis no provider made. If the BMI and the rest of the record point to a reportable condition, a compliant query is the route.
Source: ICD-10-CM Official Guidelines, FY2026, I.B.14 (pp. 15–16) and I.C.21.c.3, Z68 Body mass index (BMI) (p. 95).
13. Provider diagnosis vs. clinical criteria
During a February 2026 admission, the attending documents "acute respiratory failure." Reviewing the record under the facility's clinical-validation process, you identify a concern about the documentation supporting that diagnosis. What do you do?
Answer: C. Code assignment rests on the provider's diagnostic statement, not on the coder's reading of clinical criteria. That doesn't mean ignoring a weak record: when documentation conflicts or looks clinically unsupported, it goes back to the provider through a compliant query under facility policy. A and B substitute the coder's judgment for the provider's. D invents a requirement.
Source: ICD-10-CM Official Guidelines, FY2026, I.A.19 (p. 12); ACDIS/AHIMA query guidelines, 2026, Clinical validation queries and When to Query (pp. 16–17).
14. Incomplete procedure documentation
A February 2026 inpatient had a wedge of the right liver lobe removed. The operative report, anesthesia record and every other note in the chart are silent on whether the surgeon used an open or a laparoscopic approach. What's the next step before finishing the PCS code?
Answer: C. A PCS code is valid only when all seven characters are specified, and the guidelines say to query the physician when documentation is incomplete for coding purposes. A and B fill a missing fact with an assumption. D fails because the applicable 0FB table has no "approach not specified" choice for this liver excision.
Source: ICD-10-PCS Official Guidelines, 2026, A8 (p. 4); FY2026 PCS tables, Table 0FB.
15. Compliant query format
After surgery in February 2026, a patient's hemoglobin falls and two units of red cells are transfused. The provider hasn't documented a related diagnosis. Which query is compliant?
Answer: B. A compliant query is nonleading, cites relevant clinical indicators from this patient's record, and offers clinically relevant options plus a way for the provider to give another explanation, such as "other." Yes/no queries confirm existing documentation; they shouldn't be used to get a new, previously undocumented diagnosis (A). Queries must never mention reimbursement or quality impact (C). Bolding or highlighting an option is leading (D).
Source: ACDIS/AHIMA Guidelines for Achieving a Compliant Query Practice, 2026 Update, pp. 7–8 and 10–13 (required elements, emphasis and query formats).
16. Query opportunity: nonspecific terms
A February 2026 discharge summary says the patient was treated for "urosepsis." Nothing else in the record clarifies the term. What's the right action?
Answer: D. "Urosepsis" is a nonspecific term. It isn't a synonym for sepsis and has no default code in the Index, so the guideline requires a query. A, B and C each guess at what the provider meant.
Source: ICD-10-CM Official Guidelines, FY2026, I.C.1.d.1(a)(ii) (p. 23).
17. Hospital-acquired conditions and POA
A Medicare fee-for-service inpatient in a hospital paid under the inpatient prospective payment system (IPPS) develops a new stage 3 pressure ulcer of the sacrum on day 5 of a February 2026 stay, and the provider documents that it developed during the stay. Which statement is correct?
Answer: D. Stage III and IV pressure ulcers are on CMS's hospital-acquired condition list, so one that wasn't present on admission doesn't raise the payment. It's still coded, accurately, with POA N. A suppresses a documented condition. C misuses W, which is only for when the provider can't clinically determine timing, and picking an indicator to protect payment is a compliance problem. B: the ulcer didn't occasion the admission.
Source: CMS, Hospital-Acquired Conditions, HAC categories and payment provision; CMS, Affected Hospitals, IPPS scope; ICD-10-CM Official Guidelines, FY2026, Appendix I (pp. 117–119).
18. Ethics and reportable secondary diagnoses
A patient is admitted in February 2026 for appendicitis and has an appendectomy. Last year's admission documented heart failure, but this stay's record never mentions it, and nothing was evaluated, treated or monitored for it. Your supervisor asks you to add heart failure "to capture severity." What do you do?
Answer: C. For inpatient reporting, a secondary diagnosis has to affect this stay: clinical evaluation, therapeutic treatment, diagnostic procedures, a longer stay, or increased nursing care or monitoring. It also has to be documented in this record. Carrying a diagnosis forward from an old admission to raise severity misrepresents the data, which AHIMA's ethical coding standards tell coders to refuse. A overstates the chronic-condition rule. B answers a POA question nobody asked. D: verbal agreement isn't documentation.
Source: ICD-10-CM Official Guidelines, FY2026, Section III and III.A (pp. 110–111); AHIMA Standards of Ethical Coding (2016), Standards 3 and 5; interpretation 1.5.
19. UHDDS: abnormal findings
During a February 2026 stay, a routine metabolic panel shows potassium of 3.2 mmol/L. The provider doesn't comment on it, orders no repeat test and gives no treatment. What do you report for the potassium?
Answer: A. Abnormal findings aren't coded unless the provider indicates their clinical significance. If the provider had ordered further tests or treatment for an abnormal value without naming a diagnosis, it would be appropriate to ask whether a diagnosis should be documented. Here nothing was done, so B, C and D each report a finding the provider didn't treat as significant.
Source: ICD-10-CM Official Guidelines, FY2026, Section III.B (p. 111).
20. HIPAA: minimum necessary and workforce access
A coder sees a news story about a local celebrity admitted to her hospital. She isn't assigned to that account, but she opens the record "just to see the diagnosis codes." Which statement is correct?
Answer: C. Under the minimum necessary standard, a covered entity's policies identify who in the workforce needs access to which information to do their jobs, and limit access to that. Curiosity isn't a job need, so employment (A), discretion (B) or the general purpose of coding (D) doesn't make this access appropriate. The exceptions to the standard, such as disclosures for treatment or to the patient, don't apply here.
Source: HHS, Minimum Necessary Requirement, How the Rule Works; uses and disclosures.
21. HIPAA Security Rule: audit controls
After a celebrity patient's stay, the HIM director wants to find out which users opened that patient's electronic record. Which EHR function is built for that?
Answer: A. The HIPAA Security Rule requires audit controls: hardware, software or procedures that record and let you examine activity in systems holding electronic PHI. That's where an access review starts. Authentication (C) confirms a user's identity; it does not by itself establish which patient records the user opened. A grouper (B) and an encoder (D) are coding tools, not security logs.
Source: HHS, Summary of the HIPAA Security Rule, Technical Safeguards: Audit Controls; Authentication.
22. Computer-assisted coding (CAC)
Your CAC software suggests a pulmonary embolism code for a February 2026 ED visit (patient sent home). The physician's final note reads: "Rule out pulmonary embolism. CT angiogram negative. Chest wall pain." What do you do?
Answer: B. A software suggestion does not replace validation against the documentation and coding rules. The coder validates every suggestion. In an outpatient encounter a ruled-out condition isn't coded; you code what was established, here the chest wall pain. A, C and D all report a condition not established in the provider's final outpatient documentation.
Source: AHIMA CCS Exam Content Outline (effective May 1, 2024), Domain 5, Task 3; AHIMA Standards of Ethical Coding, interpretation 9.2; ICD-10-CM Official Guidelines, FY2026, Section IV.H (p. 114).
23. HITECH breach notification
A hospital learns on March 3 that an unencrypted laptop holding protected health information for 650 residents of one state was stolen. The incident is confirmed as a reportable breach. Which response meets the Breach Notification Rule?
Answer: D. When a breach affects more than 500 residents of a state or jurisdiction, the covered entity notifies the individuals, prominent media outlets and HHS, without unreasonable delay and no later than 60 days after discovery. The annual HHS log in A is for breaches affecting fewer than 500 people. C skips the individuals and the media. B invents a 1,000-person threshold.
Source: HHS, Breach Notification Rule, Individual, media and Secretary notice.
These are original, unofficial questions we wrote for this page. They aren't real or recalled exam items. They're spread across all five domains, roughly in proportion to the blueprint. Your score here describes these 23 questions only; it isn't a scaled score or a prediction of passing. This is a short practice set, not a full-length exam or coverage of every blueprint task.
After the set: count your misses by domain. For each miss, identify the rule or lookup step that needs another session. With only two to ten questions per domain, though, treat that as a pointer, not a measurement.
The CCS on one screen
This prep follows the content outline in effect since May 1, 2024 and the 2026 code books AHIMA requires for exams on or after May 1, 2026.
| Domain | Share of the exam | Scored items AHIMA allocates | What to drill |
|---|---|---|---|
| 1. Coding Knowledge and Skills | 39–41% | 38–40 | Principal vs. first-listed diagnosis, sequencing, present on admission (POA), ICD-10-PCS root operations and approach, CPT/HCPCS modifiers, MCCs and CCs, coding edits, DRG and APC basics |
| 2. Coding Documentation | 18–22% | 17–21 | Conflicting documentation (laterality, admission type), what a code needs from the record, who may document what |
| 3. Provider Queries | 9–11% | 9–11 | Spotting query opportunities; telling a compliant query from a leading one |
| 4. Regulatory Compliance | 18–22% | 17–21 | UHDDS reporting rules, patient safety indicators and hospital-acquired conditions, payer rules, HIPAA, AHIMA's ethical coding standards |
| 5. Information Technologies | 9–11% | 9–11 | Types of electronic health records (EHRs), encoders and groupers, computer-assisted coding (CAC), HITECH |
| Medical-scenario format (across the domains) | Scenario settings: inpatient, outpatient and ED, approximately one-third each | 18 scored items, included in the domain totals | Coding from documentation with your books open |
Sources: AHIMA's CCS Exam Content Outline (domains, weights, scenario settings) and its 2023 job-analysis crosswalk (item allocation, Tables 1–2).
Before you buy books this fall: real-world ICD-10-CM switched to the FY2027 code set on October 1, 2026, but AHIMA's CCS list still requires the 2026 books for exams on or after May 1, 2026. Buy from the 2026 list, study the FY2026 guidelines printed in those books, and recheck AHIMA's CCS page before your test date. Every dated coding encounter on this page is set in February 2026 so the FY2026 rules apply. Book rules are below.
Worked inpatient case: how to think it through
Scenario items are 18 of the 97 scored items, about one in five. They test whether you can turn a record into the right codes in the right order. Use this sequence to work through the inpatient case below. Use your 2026 books to confirm each code.
The case (original, unofficial). In February 2026, a 68-year-old is admitted from the ED with right-upper-quadrant pain. Ultrasound and the surgeon's documentation confirm acute cholecystitis with stones in the gallbladder, without obstruction. On day 2 the surgeon performs a laparoscopic cholecystectomy, removing the entire gallbladder without hand assistance; no device other than routine closure materials remains. On day 3 the patient develops atrial fibrillation, documented by the attending and treated with diltiazem. The attending does not document a cause-and-effect relationship between the surgery and the atrial fibrillation or further specify the atrial fibrillation subtype. History: type 2 diabetes and chronic kidney disease stage 3a, both noted and managed during the stay. The patient was taking oral metformin as ongoing long-term treatment before admission, and it remains part of the treatment plan at discharge.
| Step | The question | Result | Why |
|---|---|---|---|
| 1. Principal diagnosis | Which condition, after study, occasioned the admission? | K80.00 Calculus of gallbladder with acute cholecystitis without obstruction | One combination code captures both the stones and the acute cholecystitis, so you don't code them separately (guideline I.B.9) |
| 2. Secondary diagnoses | Which conditions affected this stay? | E11.22 and N18.31; I48.91; Z79.84 | "With" presumes the diabetes–kidney link (I.A.15) and the Tabular note requires the CKD stage; the atrial fibrillation was evaluated and treated (Section III); Z79.84 identifies long-term oral hypoglycemic use (I.C.4.a.3) |
| 3. Complication or not? | Is the atrial fibrillation a surgical complication? | Code the atrial fibrillation itself, not a complication code | A condition arising after surgery is not automatically a complication. Here, no cause-and-effect relationship is documented; query if that relationship is unclear. The provider does not have to use the word "complication" when the relationship is otherwise documented (I.B.16) |
| 4. POA | Present when the inpatient order was written? | K80.00 Y; E11.22 Y; N18.31 Y; I48.91 N; Z79.84: exempt from POA reporting | The atrial fibrillation started on day 3. Z79.84 is on the FY2026 POA-exempt list, so its POA field is left blank (Appendix I, pp. 117–118) |
| 5. Procedure (ICD-10-PCS) | Root operation, body part, approach, device, qualifier | 0FT44ZZ Resection of gallbladder, percutaneous endoscopic approach | The whole gallbladder was removed (Resection); the documented laparoscopic approach is percutaneous endoscopic; no reportable device or qualifier applies (PCS guidelines B3.8 and B6.1a–b; FY2026 PCS Table 0FT) |
Code references: FY2026 ICD-10-CM code descriptions and Index/Tabular for K80.00, E11.22, N18.31, I48.91 and Z79.84; FY2026 ICD-10-PCS code file for 0FT44ZZ. The diagnosis rules cited by section above are in the FY2026 ICD-10-CM guidelines.
What the case teaches: sequencing, combination codes, complication documentation, and the POA indicator on a condition that started mid-stay.
Your 8-week CCS study plan
Assumptions: 8–10 hours a week, and you already code or have finished coding coursework. Review AHIMA's recommended preparation backgrounds alongside those assumptions; the coursework route also recommends a year of coding experience. This is our editorial plan, not an AHIMA requirement or a promise that eight weeks is enough for everyone.
Run each hour the same way: about 10 minutes recalling a rule from memory, 35 minutes applying it to cases or codes, and 15 minutes writing down what you got wrong and why (use the log below).
| Week | Focus | Do this |
|---|---|---|
| 1 | Setup and baseline | Check that you have the three required 2026 books and compare their ISBNs against AHIMA's list. Read the ICD-10-CM conventions and general guidelines (Section I.A–B) and Sections II–IV. Take the 23 questions above and start your error log |
| 2 | ICD-10-CM chapter guidelines | Sepsis and severe sepsis, neoplasms, diabetes, hypertension with heart and kidney disease, pregnancy, injuries and poisonings. Work the relevant examples in the official guidelines and the diagnosis questions on this page. For each, verify the Index-to-Tabular path, write the governing rule and log any error |
| 3 | ICD-10-PCS | Root operation definitions (Excision vs. Resection, Drainage vs. Extirpation, Repair vs. Supplement), approach, devices, and the multiple-procedure and biopsy guidelines. Use this page's PCS questions and worked inpatient case to identify the documented objective, body part, approach and remaining characters. Complete a code only when the documentation supports every required character, then verify the combination in the PCS table |
| 4 | Outpatient and ED | Your CPT book's guidelines and modifier appendix, facility modifiers for discontinued procedures, NCCI edits, and the outpatient diagnosis rules in Section IV |
| 5 | Documentation and queries | Conflicting documentation, who may document what (I.B.14), and the 2026 ACDIS/AHIMA query guidelines. Write a neutral clarification query for each of this page's laterality conflict (CCS-SP-11), missing operative approach (CCS-SP-14), and postoperative documentation question (CCS-SP-15). Check each for clinical support, neutral wording and an independent provider response |
| 6 | Compliance, reimbursement and IT | UHDDS, POA and the hospital-acquired condition list, patient safety indicators, MS-DRGs with MCCs and CCs, APCs, HIPAA and HITECH, encoders vs. groupers, CAC, and AHIMA's ethical coding standards |
| 7 | Timed mixed practice | Divide this page's questions into two timed mixed blocks and review the worked case. Keep repeat attempts labeled as repeats. If you already have legitimate additional cases, include inpatient, outpatient and ED records. Use the 2.2-minute average below as an overall pacing reference |
| 8 | Full rehearsal and logistics | One timed full-length practice exam, if you have a legitimate one, then a review of every miss. Otherwise, complete a timed review of this page's questions and worked case; this shorter repeat is not a full-length mock or a fresh readiness measurement. Recheck your books against the list, confirm your appointment and IDs, and plan the drive |
4-week version for experienced inpatient coders: combine weeks 1–2, 3–4, 5–6 and 7–8 into one week each. Keeping the same workload requires about 16–20 hours a week.
Adapting the plan: if you can't yet find your way around the code books or explain the guideline behind a question, add foundation time before you compress anything. If you work mostly in one setting, give the other setting extra sessions. After a failed attempt, use the domain percentages and your error log to set review priorities while continuing to cover the whole outline. Coding Knowledge and Skills is about 40% of the exam, so keep it in the rotation and use your specific errors to decide where extra hours go.
Turn a missed question into your next study task
"I need to study coding" is too broad to act on. Write down the specific decision that went wrong.
| Question or case | My answer and why | The rule I missed | Where it lives | Next action | Recheck |
|---|---|---|---|---|---|
| Example: CCS-SP-10 | I thought indicator 1 meant the pair is always payable with a modifier | A modifier can bypass the edit only when the clinical circumstances justify it | NCCI Policy Manual, Ch. I, p. I-14 | Write what documentation I'd look for before using a modifier | In a week, explain it without looking |
| Your next miss |
For each miss, decide whether it came from the setting, missing documentation, the rule itself, finding it in the book, or rushing the question. Then open the source, write the corrected decision, and come back to it a few days later. Answering these same 23 questions correctly a second time shows you've learned these items; it isn't fresh evidence that you're ready.
After a failed attempt: Use the domain percentages on your score report to choose your next study block. With only 9–11 scored items in some domains, use those percentages alongside the specific errors in your study log. You can reapply, but AHIMA waits at least 30 days after the failed attempt before approving the new application, and you need a new authorization to test before scheduling. AHIMA's application page has the process.
Code books: what to bring and how you can mark them
Required for exams on or after May 1, 2026 (bring all three):
- One 2026 ICD-10-CM book from AHIMA's approved list (editions from AHIMA, AMA, Elsevier, Optum360, AAPC, Decision Health and PMIC, each with a specific ISBN)
- One 2026 ICD-10-PCS book from the approved list
- The AMA CPT 2026 Professional Edition, either the spiral book or the listed Professional Edition and QuickRef app bundle
The test center checks your books against the 2026 list. If they aren't on it, you won't be allowed to test and you'll forfeit the exam fee. A HCPCS Level II book isn't on the CCS list, even though HCPCS is still study content. Buying the bundle that includes an app doesn't make the app usable in the test room.
Marking rules from AHIMA's candidate guide ("Test Center Restrictions"):
- Handwritten notes are allowed, but not notes that copy coding rules or guidelines from other references such as Coding Clinic or CPT Assistant
- No sticky notes or loose papers
- No handmade tabs
- No calculators or other electronic devices
Go by the list in force on your exam date, not by what's newest in the store.
CCS exam facts
| Topic | Detail |
|---|---|
| Who runs it | AHIMA; the certification is administered by its Commission on Certification for Health Informatics and Information Management (CCHIIM) |
| Where | Pearson VUE test centers, in the US and internationally. The CCS isn't offered by remote proctoring |
| Questions | 107 in all: 86 multiple-choice items (79 scored, 7 unscored) and 21 scenario items (18 scored, 3 unscored). Unscored pretest items are mixed in at random, so treat every item as scored |
| Question types | Multiple-choice items have four options and one correct answer. Scenario items present a case followed by a series of questions, and some have more than one correct answer |
| Time | A 4-hour appointment: 5 minutes for the confidentiality agreement, then 3 hours 55 minutes for the instructions and the exam. No scheduled breaks; the clock keeps running if you step out |
| Moving around | You can go back and forth and flag items for review, but you must select an answer before moving to another item |
| Scoring | Scaled from 100 to 400; 300 or higher passes. There's no penalty for guessing. A scaled score isn't a percentage |
| Results | Immediately after completion, with a score report that includes percent-correct by domain; a beta administration without a pre-established passing mark can have delayed results |
| Fee | $299 for AHIMA members, $399 for non-members. A retake costs the same |
| Eligibility | These preparation backgrounds are recommendations, not requirements: courses in A&P, pathophysiology, pharmacology, medical terminology, reimbursement, intermediate/advanced ICD coding and CPT/HCPCS, plus 1 year of coding; 2 years of coding; the CCA plus 1 year; another organization's coding credential plus 1 year; or a CCS-P, RHIT or RHIA |
| Testing window | Schedule and take the exam within your 120-calendar-day eligibility period; use the start and end dates on your authorization-to-test letter |
| Retake | New application and fee; AHIMA waits at least 30 days after the failed attempt before approving the application. Schedule only after a new authorization to test is issued |
| Keeping it | A 2-year cycle with continuing education and a recertification fee |
Sources: AHIMA CCS page (Exam Specifications, Pricing, Retake Policy); About AHIMA certification exams (question types, scoring); AHIMA timing guidance (appointment and breaks); AHIMA results guidance (reports and beta exception); AHIMA application rules (eligibility period and retakes); crosswalk, Table 2 (item counts).
How hard is it?
AHIMA publishes first-time pass rates, and most first-time candidates pass:
| Year | First-time testers | First-time pass rate |
|---|---|---|
| 2025 | 6,331 | 84% |
| 2024 | 4,031 | 75% |
| 2023 | 3,287 | 64% |
Source: AHIMA CCS page, Certified Professionals and Pass Rates. These numbers describe the people who chose to sit, a group AHIMA steers toward coding experience, so they aren't your personal odds.
Test-day pacing
You get 3 hours 55 minutes for 107 items. That's 235 ÷ 107 ≈ 2.2 minutes per item on average, and the reading time for the instructions comes out of the same clock. Scenario items take longer than recall questions, so:
- Answer recall questions briskly and bank the time
- On an inpatient case, settle the principal diagnosis and the main procedure first, then the secondary codes, then indicators like POA
- If a code won't surface after a reasonable search, select your best answer, flag the item and move on. You have to answer before you can move, and a guess costs nothing
- Leave about 10 minutes at the end for flagged items
Arrive 30 minutes early with two valid IDs whose names match your authorization letter: a primary ID with your photo and signature, and a secondary ID with your name and either your signature or a recognizable photo, as described in Pearson VUE's ID policy. Late arrival can be treated as a no-show, and the fee is forfeited. Pearson VUE's AHIMA page has the check-in rules.
Is the CCS the right exam?
- CCS (AHIMA): hospital inpatient and outpatient coding with ICD-10-CM, ICD-10-PCS and CPT, including ED cases
- CCS-P (AHIMA): physician-based coding in offices, clinics and specialty centers
- CCA (AHIMA): AHIMA's entry-level coding credential. Passing the CCS supersedes the CCA
- CIC (AAPC): AAPC's inpatient facility coding credential. See our AAPC CIC exam prep guide if you're weighing it against the CCS
If a job posting or employer names a required credential, check that requirement before choosing an exam.
Sources and independence
Last verified: October 22, 2026. We checked AHIMA's CCS page, content outline, item crosswalk, 2026 code book list, candidate guide, exam-format, timing, results and application pages, and Pearson VUE's AHIMA page, plus the coding and regulatory sources cited with each question and the official FY2026 code files used in the worked case. The study plan, error log, practice questions and worked case are our own editorial material.
- AHIMA: Certified Coding Specialist (CCS) · CCS Exam Content Outline, effective May 1, 2024 · CCS job-analysis crosswalk · CCS 2026 required code books · About AHIMA certification exams · Exam timing · Exam results · Application and retake rules · Candidate Guide · Standards of Ethical Coding (2016)
- Pearson VUE: AHIMA testing information · Identification policy
- CDC/CMS: ICD-10-CM Official Guidelines for Coding and Reporting, FY2026 · ICD-10-PCS Official Guidelines, 2026 · NCCI Policy Manual for Medicare, 2026, Chapter I · Medicare Claims Processing Manual, Ch. 4 §20.6.4 · Hospital-Acquired Conditions · Affected hospitals
- ACDIS/AHIMA: Guidelines for Achieving a Compliant Query Practice, 2026 Update
- HHS: Minimum Necessary Requirement · Summary of the HIPAA Security Rule · Breach Notification Rule
Editorial method: This page was developed and source-checked with AI assistance, following Castleport's methodology. Source checking is not credentialed professional review. The practice scenarios are hypothetical.
Independence: Castleport Test Prep is an independent exam prep publisher. We aren't affiliated with, endorsed by or approved by AHIMA or its Commission on Certification for Health Informatics and Information Management. CCS and other exam and credential names identify the subjects covered, and trademarks belong to their respective owners. The practice questions and worked case are original and unofficial; they aren't actual exam items. No study resource can guarantee a passing score.