CCS Exam Guide 2026: Pass AHIMA Inpatient Coding (FREE)

The CCS Is the Inpatient Coder's Gold Standard — Here's How to Pass It in 2026

The AHIMA Certified Coding Specialist (CCS) credential is the single most respected certification in inpatient hospital coding in the United States. While the AAPC's CPC is designed for physician offices and outpatient clinics, the CCS validates that you can walk into any acute care hospital, open a 200-page inpatient chart, assign ICD-10-CM diagnoses, build ICD-10-PCS procedure codes table-by-table, sequence a principal diagnosis, apply POA indicators, and land an accurate MS-DRG — all without breaking a sweat.

That complexity is exactly why the CCS pays more than almost any entry-level coding credential, why CDI specialists list it as a prerequisite, and why large hospital systems (HCA, Kaiser, Cleveland Clinic, Ascension) explicitly hire for it.

This 2026 guide covers the verified cost, structure, domains, pass rate, study plan, and career outlook — plus the specific ICD-10-PCS and case-coding traps that cause most candidates to fail. Everything is free.

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CCS Exam At a Glance (2026)

All figures verified against AHIMA's official CCS page and 2026 Candidate Guide.

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What the CCS Is — and Why It Matters in 2026

The CCS demonstrates mastery of inpatient and outpatient hospital coding using four code sets simultaneously: ICD-10-CM (diagnoses), ICD-10-PCS (inpatient procedures), CPT (outpatient procedures), and HCPCS Level II (supplies, injections, DME).

More importantly, it proves you can read a full medical record — H&P, progress notes, operative reports, pathology, discharge summary — and make defensible coding decisions that drive reimbursement through the MS-DRG (Medicare Severity Diagnosis Related Group) system. In 2026, with CMS tightening documentation integrity audits and the OIG Work Plan focused on sepsis, malnutrition, and heart failure coding, hospitals need coders who can get it right the first time.

Why CCS > CPC for Hospital Work

• ICD-10-PCS mastery: CPC candidates never touch ICD-10-PCS. CCS candidates must build 7-character procedure codes from root operation tables.
• Full-record coding: CCS scenarios give you the entire chart. CPC scenarios give you an operative note excerpt.
• MS-DRG assignment: Principal diagnosis selection, CC/MCC identification, and surgical DRG logic are CCS territory.
• Salary premium: AHIMA workforce data consistently shows CCS holders earning a premium over CPC-only coders, particularly in acute care.

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Who Should Take the CCS (and Who Shouldn't)

Ideal Candidates

1. Working inpatient coders with 2+ years of hands-on chart experience. AHIMA's strongest predictor of passing is real coding volume — not classroom hours.
2. RHIT or RHIA credential holders transitioning from HIM generalist roles into pure coding.
3. CCS-P holders wanting to add inpatient capability. You already know the query and compliance material; you need PCS.
4. CCA holders with 2–3 years of experience ready to step up to the advanced credential.
5. Nurses moving into CDI who want coding depth before pursuing CCDS or CDIP.

Skip the CCS (For Now) If You Are

• A brand-new coder with no chart experience — start with CCA or a formal HIM associate's degree.
• An outpatient-only or physician-office coder — CPC maps better to your work.
• A coder who has never opened an ICD-10-PCS book — the learning curve is steep.

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Eligibility Recommendations (Not Hard Requirements)

AHIMA does not gate the CCS behind mandatory experience or a degree. You can register and sit for the exam without proving prior training. However, AHIMA's official recommendation is that you meet one of the following:

Credential route: Hold an RHIA, RHIT, or CCS-P credential.

Education route: Completed college-level coursework in all of the following:

• Anatomy & physiology
• Pathophysiology
• Pharmacology
• Medical terminology
• Reimbursement methodology (MS-DRG, APC, IPPS, OPPS)
• Intermediate/advanced ICD-10-CM diagnostic coding
• ICD-10-PCS procedural coding
• CPT/HCPCS procedural coding

Realistic prerequisites from practicing coders:

• Fluency in ICD-10-CM Official Guidelines (especially Section I.C. chapter-specific rules)
• Comfort building ICD-10-PCS codes from tables (not just looking them up in an index)
• CPT surgery coding including E/M, modifiers 25/59/51, and the global surgical package
• HCPCS Level II for injections, infusions, and DME
• Ability to code a full 8–10 inpatient records per day at ≥95% accuracy

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Exam Structure: The Two Sections

Section 1 — Multiple Choice (97 items: 79 scored + 18 pretest)

Traditional 4-option multiple-choice items testing:

• Coding conventions and official guidelines
• Sequencing rules (principal vs. secondary)
• POA indicator assignment
• NCCI edits, MUEs, and medical necessity
• Reimbursement methodologies (MS-DRG, APC, IPPS, OPPS)
• Compliance topics (HIPAA, OIG Work Plan, RAC audits, fraud/abuse)
• Query compliance (non-leading format per AHIMA/ACDIS Practice Brief)
• EHR, encoder, grouper, and CAC software concepts

Target pace: ~1 minute per MC question to preserve time for scenarios.

Section 2 — Medical Scenarios (8 cases: 6 scored + 2 pretest)

This is where CCS candidates most often run out of time. You are given full or partial medical records (H&P, op report, path, discharge summary) and must assign all applicable codes. AHIMA confirms scenarios are distributed equally across three care settings:

Scenario items use multiple-choice multiple-response (more than one correct answer) — partial credit exists, but so does partial loss. Missing one code on a multi-code scenario costs points.

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Content Domains and Weights (Effective 05/01/2024 — Still Current for 2026)

AHIMA's official CCS Exam Content Outline splits competencies across five domains. Percentages reflect question weighting.

Domain 1 Deep Dive — Coding Knowledge & Skills (39–41%)

The single largest domain. Expect heavy testing on:

ICD-10-PCS Root Operations You Must Memorize

ICD-10-PCS Medical and Surgical section (section 0) has 31 root operations grouped into 9 functional families. CCS tests all of them, but candidates most often miss the distinctions within groups:

Test-tip: When documentation is ambiguous (e.g., "partial removal"), Excision is the answer. When documentation says "removal of entire organ," Resection is correct. Don't force "Removal" — that root specifically means removing a device.

Worked ICD-10-PCS Example

Scenario: Surgeon performs a laparoscopic cholecystectomy. Entire gallbladder removed. No device placed.

Step-by-step code construction:

1. Section (char 1) = 0 (Medical and Surgical)
2. Body System (char 2) = F (Hepatobiliary System and Pancreas)
3. Root Operation (char 3) = T (Resection — all of body part removed)
4. Body Part (char 4) = 4 (Gallbladder)
5. Approach (char 5) = 4 (Percutaneous Endoscopic — laparoscopic)
6. Device (char 6) = Z (No Device)
7. Qualifier (char 7) = Z (No Qualifier)

Final code: 0FT44ZZ — Resection of Gallbladder, Percutaneous Endoscopic Approach.

Common error: selecting Excision (0FB44ZZ) because the word "excision" appears in the op note preamble. The completion of the procedure (entire organ removed) dictates Resection. Always read to the end of the op note.

The "Why–Where–How–What" PCS Build Methodology

Before opening a PCS table, answer four questions from the op report. This technique (widely taught by AAPC and Libman Education) prevents the most common mistake — picking a root operation because the surgeon named the procedure that way instead of based on what was actually done:

1. Why was the procedure performed? (objective/intent) → drives root operation
2. Where was it performed? (anatomy) → drives body system and body part
3. How was it performed? (open, percutaneous, endoscopic, via natural opening, external) → drives approach
4. What was used or left in place? (device, no device) → drives device character

Only after answering these four questions do you open the PCS table and select the qualifier. This method is the single most reliable way to beat the scenario section.

UHDDS: The Definition Every CCS Candidate Must Know

The Uniform Hospital Discharge Data Set (UHDDS) is the federally-defined data standard that governs inpatient reporting. Know these definitions verbatim:

• Principal diagnosis: "The condition established after study to be chiefly responsible for occasioning the admission of the patient to the hospital for care."
• Other (secondary) diagnoses: Conditions that coexist at admission, develop subsequently, or affect treatment received and/or length of stay — must be clinically evaluated, therapeutically treated, require diagnostic procedures, extend LOS, or increase nursing care/monitoring.
• Principal procedure: One performed for definitive treatment (not diagnostic), OR one performed to treat a complication, OR one most related to the principal diagnosis.

Principal diagnosis ≠ admitting diagnosis. Principal diagnosis ≠ reason for ED visit. Principal diagnosis is always determined after study, using the full record. This is CCS bread and butter.

Domain 2 — Coding Documentation (18–22%)

Tests your ability to:

1. Resolve conflicting documentation (attending says "pneumonia," radiologist says "possible infiltrate")
2. Verify the body of the record supports assigned codes (not discharge summary alone)
3. Validate laterality, type, acuity, and linkage (diabetes-with)
4. Apply the "code only what is documented" rule — you cannot infer a diagnosis from lab values alone
5. Recognize when documentation conflicts require a query vs. when the attending's decision controls
6. Identify documentation from non-providers (dietitians, wound care nurses) that cannot stand alone as diagnostic basis — but can support certain body mass index (BMI), pressure ulcer staging, and non-pressure ulcer severity codes when the associated diagnosis is documented by the provider

Domain 3 — Provider Queries (9–11%)

Small domain, but easy points if you study the AHIMA/ACDIS 2022 Guidelines for Achieving a Compliant Query Practice (updated brief). Know:

• Non-leading query format (present clinical indicators, ask open-ended question)
• When a query is required (conflicting, ambiguous, incomplete, clinically unsupported)
• When not to query (already clearly documented)
• Format options: open-ended, multiple choice with "other/unable to determine/clinically undetermined"
• Verbal queries must be documented

Domain 4 — Regulatory Compliance (18–22%)

Hospital coding lives under heavy regulation. AHIMA tests:

• HIPAA Privacy Rule, Security Rule, minimum necessary standard
• OIG Annual Work Plan focus areas (sepsis, malnutrition, mechanical ventilation, CC/MCC capture)
• RAC (Recovery Audit Contractor) audits and appeal rights
• CMS CoverageDeterminations (NCD, LCD)
• NCCI edits (Column 1/Column 2, Mutually Exclusive) and MUE (Medically Unlikely Edits)
• Fraud vs. abuse distinctions; False Claims Act basics
• Upcoding, unbundling, DRG creep — the three things that get hospitals fined

Domain 5 — Information Technologies (9–11%)

• EHR types (inpatient, outpatient, hybrid)
• Encoder vs. grouper software (and the common Optum, 3M, TruCode products)
• Computer-Assisted Coding (CAC) — how NLP suggests codes, why coder validation still required
• HITECH Act meaningful use, breach notification
• Data integrity in EHR copy-forward / cloning situations (why coders must not rely on "history" sections that were never updated)
• Basic understanding of HL7 messaging and FHIR data exchange (increasingly tested in 2026)
• Audit logs and access controls

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Worked Full Inpatient Case Example

Chart excerpt:

68-year-old male admitted through ED with 3-day history of productive cough, fever 101.8°F, SOB, and confusion. Past medical history: Type 2 DM on metformin with stable A1c 7.1%, hypertension on lisinopril, ischemic cardiomyopathy with EF 30%, stage 3 CKD. On admission: SpO2 84% on room air, BP 88/52, HR 118, RR 28. WBC 19.4, lactate 3.2, creatinine 2.4 (baseline 1.8). CXR shows right lower lobe consolidation. Blood cultures +Streptococcus pneumoniae. Started on IV ceftriaxone + azithromycin, IV fluids, and non-invasive ventilation. Over hospital day 2 developed acute-on-chronic systolic heart failure exacerbation treated with IV furosemide. Discharge day 6 after completing IV antibiotics; transitioned to oral levofloxacin.

Coding walkthrough:

POA indicators: All the above are POA = Y except note that N17.9 (AKI on CKD) may require clarification if baseline wasn't clearly in the ED note.

MS-DRG assignment: With A40.3 as principal + R65.21 (MCC) + acute respiratory failure (MCC) + acute-on-chronic HF (MCC), this case groups to MS-DRG 871 (Septicemia or severe sepsis without mechanical ventilation >96 hours with MCC) — relative weight ~1.8. Without MCC capture, it would drop to DRG 872 (~weight 1.0), a significant reimbursement loss.

Teaching points:

• Sepsis with localized infection = code both
• R65.21 requires explicit provider documentation of "severe sepsis" or "septic shock" — lactate + hypotension alone don't code to R65.21
• Acute organ dysfunction in sepsis should be queried if not clearly linked to sepsis
• Long-term drug use codes (Z79.x) are frequently missed and are CCs in some contexts

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Pass Rate and Difficulty: The Honest Picture

AHIMA publishes first-time pass rates on the official CCS page. Historical range has hovered between 50–70% for first-time testers, with year-to-year variability driven by content outline updates and code set changes. Third-party prep providers (Libman Education, Medesun, AMBCI) have reported rates as low as 40–50% in years immediately following major guideline revisions.

Key takeaway: the CCS is harder than the CCA and harder than the CPC in absolute coding depth, because ICD-10-PCS adds an entire code-construction skill that neither of those exams requires. Candidates who pass almost universally report:

• 3–6 months of focused prep (on top of working experience)
• At least two full-length timed mock exams
• 50+ PCS case drills across multiple body systems
• Heavy use of AHIMA's Coding Self-Assessment

Why Candidates Fail

The four recurring failure modes:

1. Weak PCS table navigation. Candidates memorize codes instead of learning to build them. A new root operation on exam day = instant wall.
2. Time collapse on scenarios. Section 1 runs long, leaving 15 minutes for each scenario instead of the needed 25–30.
3. Query compliance errors. Picking a "leading" query option because it "sounds medical" instead of applying the ACDIS/AHIMA non-leading standard.
4. POA and sequencing mistakes. Confusing principal diagnosis with reason for admission, or assigning POA "Y" when documentation is unclear.

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Keep Practicing — Free CCS Question Bank

Practice CCS Questions Now →Practice questions with detailed explanations

Timed case scenarios, PCS table drills by body system, POA challenge sets, and compliant-query quizzes. All free.

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16-Week CCS Study Plan (For Working Coders)

A realistic plan for someone coding full-time while preparing.

Total: ~155 study hours on top of daily coding work.

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Recommended Resources

The CCS prep market is small but high-quality. These are the resources practicing CCS coaches actually recommend:

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Test-Taking Strategies

Time Allocation (4 hours total)

Multiple Choice — Elimination Workflow

1. Read the full stem first, then the answer choices.
2. Eliminate any option that violates a coding convention (not just a guideline preference).
3. If two options look correct, the one with more specificity usually wins — unless specificity isn't documented.
4. When stuck on reimbursement/compliance, default to the most conservative/most compliant answer.

Scenarios — Systematic Coding Workflow

1. Read discharge summary first (1 minute) for context.
2. Identify principal diagnosis candidate(s) — circle them in your scratch notes.
3. Scan for all secondary diagnoses with POA status cues in H&P and progress notes.
4. Find procedures in operative report(s) — list root operation candidate(s) for each.
5. Build PCS codes character-by-character using tables, not index guesses.
6. Sequence principal first, then secondaries.
7. Check CC/MCC impact on DRG if asked.

ICD-10-PCS: The Table Approach That Actually Works

1. Start in the Index — find the procedure term and note the partial code.
2. Jump to the Table indicated.
3. Confirm the root operation matches documentation (don't force it — if documentation says "removal," Remove is not automatic; think "without replacement or reattachment").
4. Select body part, approach, device, qualifier from that table's columns only.
5. Never combine characters across different tables.

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Cost Breakdown (2026)

Total first-attempt budget (non-member, no prior books): $860–$1,050. Member budget if you already own 2026 books: $299.

Tip: AHIMA membership pays for itself on a single exam attempt ($100 exam discount + $149 dues vs. $100 standalone savings).

Important: AHIMA membership is NOT required to take or maintain the CCS credential — unlike AAPC's CPC, which requires ongoing AAPC membership ($222/year) to keep the credential active. This is a structural cost advantage of CCS over CPC across a career.

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Retake Policy

If you fail, you must wait 30 calendar days before AHIMA approves a new application. The full fee ($299 member / $399 non-member) applies each attempt. Transcripts remain on file. Failed candidates receive a domain-by-domain score report showing weakest areas — use it ruthlessly to target remediation.

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Recertification: Keep Your CCS Active

Every 2 years you must earn 20 CEUs to recertify. Key 2025–2026 rules:

• 40% of CEUs must come from AHIMA, Component Associations, or AHIMA ACEP-approved providers.
• 60% may come from other approved continuing education sources.
• Annual Coding Self-Review: required, counts 5 CEUs/year.
• Recertification fee: $100 for AHIMA members, $249 for non-members.
• Late fee: $50 per credential if you miss the deadline.
• Holding multiple AHIMA credentials: +10 CEUs per extra credential, up to 50 CEUs total.

Free CEU sources: AHIMA webinars, CDC coding roundtables, ICD-10 Coordination and Maintenance Committee meetings, AHIMA Journal articles (with quizzes).

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Salary and Career Outlook

The BLS groups inpatient coders under Medical Records Specialists (OCC 29-2072). May 2023 data shows:

CCS holders consistently out-earn the general BLS figures because they work on the inpatient side. Self-reported data from AHIMA workforce surveys and third-party salary studies (AMBCI, Combine Health, AAPC 2026 Salary Survey) show:

CCS vs. CPC salary gap: most industry surveys put CCS holders $5,000–$12,000 above CPC-only coders at equivalent experience levels, driven by hospital-system pay bands.

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CCS vs. CPC vs. CCS-P vs. CIC: Which Credential Fits?

This is the single biggest decision in medical coding. Here's the honest comparison.

Which to pick:

• Inpatient hospital work → CCS is the industry standard. Some shops accept CIC.
• Physician office / outpatient clinic → CPC. CCS-P if you want AHIMA branding.
• Brand-new to coding → CCA first, then CCS.
• CDI/auditing ambitions → CCS, then add CDIP or CCDS.

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Regulatory Compliance Deep Dive — What the CCS Actually Tests

The 18–22% weighting for regulatory compliance surprises candidates who assume this is a "coding" exam. AHIMA tests compliance heavily because the real-world consequence of miscoding is False Claims Act exposure. Know these frameworks cold:

HIPAA (1996) and HITECH (2009)

• Privacy Rule (45 CFR 164.500-534): Who can access PHI and under what circumstances
• Security Rule (45 CFR 164.302-318): Administrative, physical, and technical safeguards
• Breach Notification Rule: 60-day individual notification, annual HHS report for <500 affected, immediate for 500+
• Minimum Necessary Standard: Disclose only what's needed for the intended purpose
• Treatment, Payment, Operations (TPO): PHI use permitted without authorization

OIG Work Plan 2024–2026 Focus Areas (Frequently Tested)

• Sepsis coding and SEP-1 compliance — audit target #1
• Malnutrition severity — moderate vs. severe documentation
• Mechanical ventilation hours (>96 hrs vs. <96 hrs drives major DRG shifts)
• Acute heart failure acuity (acute vs. chronic vs. acute-on-chronic)
• Two-midnight rule (observation vs. inpatient)
• Hospice and SNF transfers
• Telehealth coding and modifiers

SEP-1 Sepsis Bundle (CMS Core Measure)

CMS SEP-1 ties reimbursement and quality scoring to specific coding and documentation elements. CCS candidates should know the 3-hour and 6-hour bundle components: lactate measurement, blood cultures before antibiotics, broad-spectrum antibiotics within 3 hours, crystalloid fluids 30 mL/kg for hypotension or lactate ≥4, vasopressors for persistent hypotension, and lactate re-measurement. Miscoding sepsis or failing to capture R65.20 (severe sepsis without shock) or R65.21 (with septic shock) directly affects SEP-1 compliance reporting.

HAC (Hospital-Acquired Conditions) and POA Interaction

CMS does not pay the additional MCC/CC when a condition is flagged HAC and POA = N (not present on admission). The 14 HAC categories include:

• Foreign object retained after surgery
• Air embolism
• Blood incompatibility
• Stage III and IV pressure ulcers
• Falls and trauma (fracture, dislocation, intracranial injury, burn)
• Catheter-associated UTI (CAUTI)
• Vascular catheter-associated infection (CLABSI)
• Surgical site infection following CABG, bariatric, or orthopedic procedures
• Manifestations of poor glycemic control
• DVT/PE following total knee or hip replacement
• Iatrogenic pneumothorax with venous catheterization

POA assignment directly controls whether these fire as HACs. A condition coded POA = Y is NOT a HAC even if it appears on the HAC list — it was already there when the patient arrived.

RAC Audits

Recovery Audit Contractors review claims for over- and under-payments. Key concepts:

• Complex reviews require medical record review; automated reviews use data only
• Look-back period: typically 3 years
• Appeal levels: Redetermination → Reconsideration → ALJ → Medicare Appeals Council → Federal District Court

NCCI and MUEs

• NCCI edits prevent improper unbundling. Column 1 codes include Column 2 services; modifier -59 (or XE/XP/XS/XU) may bypass with documentation
• MUE (Medically Unlikely Edits) limit units of service per date. Example: billing 40 units of a supply code that MUE caps at 5 → 35 units denied
• Practitioner vs. Outpatient Hospital NCCI edit tables differ — know which applies

Fraud vs. Abuse (False Claims Act)

• Fraud: Intentional deception (e.g., billing for services not rendered)
• Abuse: Billing practices that cause unnecessary cost (e.g., medically unnecessary services)
• Upcoding (higher-paying code than documented) and unbundling (billing separately when bundled code exists) are the two most audited behaviors
• Qui tam whistleblower provisions — False Claims Act allows private citizens to sue on behalf of government

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Common Mistakes That Cost Candidates Points

1. Skipping PCS table drills. Memorizing codes fails. Build 200+ PCS codes from scratch using tables before exam day.
2. Ignoring POA during scenario coding. POA indicators are scored independently — miss them and you lose points on correctly assigned codes.
3. Choosing "the most specific" code when documentation doesn't support it. Never upcode. If docs say "pneumonia," don't pick J13 unless streptococcus is documented.
4. Treating queries like guesses. Pick the option that presents clinical indicators without suggesting a diagnosis. "Please clarify" beats "Is this sepsis?"
5. Spending too long on any one scenario. If a scenario is eating 35 minutes, code what you have and move on.
6. Bringing wrong-year code books. Exams on/after 5/1/2026 require 2026 editions only. Test center will refuse entry otherwise.
7. Forgetting the ICD-10-CM Official Guidelines are on-exam. You can reference them mid-exam — know where they live in your book.
8. Confusing principal diagnosis with admitting diagnosis. Principal = condition after study that occasioned admission. Read the discharge summary.

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Next Steps After CCS

Passing CCS opens three natural pathways:

Most CCS holders add CDIP or CCDS within 2–3 years. That stack (CCS + CDIP) is what hospital systems pay $100K+ for.

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Ready to Pass the CCS in 2026?

Start Your FREE CCS Practice →Practice questions with detailed explanations

Timed inpatient scenarios, ICD-10-PCS table drills by body system, POA challenge sets, query-compliance quizzes, and MS-DRG practice. 100% free, no credit card.

Pair it with AHIMA's official Self-Assessment and at least one full-length mock exam, and you'll walk into Pearson VUE prepared.

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Official Sources

• AHIMA — Certified Coding Specialist (CCS) — Official exam page, cost, pass rates
• AHIMA CCS Exam Content Outline (PDF) — Official domains and weights
• AHIMA 2026 Required Code Books (PDF) — Approved ICD-10-CM, ICD-10-PCS, CPT editions
• AHIMA Candidate Guide (PDF) — Eligibility recommendations
• AHIMA Recertification Guide — CEU requirements
• Pearson VUE — AHIMA Exam Delivery — Test center scheduling
• BLS Medical Records Specialists (OES 29-2072) — Salary and employment
• CMS ICD-10-CM Official Guidelines — Primary source
• AHIMA/ACDIS Guidelines for Achieving a Compliant Query Practice — Query compliance standard