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Case 001 (First-Listed Diagnosis): During a hospital outpatient coding quality review, the team must finalize a same-day claim. The record lists multiple chronic conditions and one acute reason for today's visit. Which diagnosis should be sequenced first on the outpatient facility claim?

Always sequence the most severe chronic condition first regardless of encounter focus.

Sequence the condition chiefly responsible for the outpatient encounter after applying ICD-10-CM instructions.

Sequence whichever diagnosis has the highest historical reimbursement.

Always sequence a symptom code first even when a definitive diagnosis is documented.

to track

2026 Statistics

Key Facts: COC (Formerly CPC-H) Exam

100

Exam Questions

AAPC format guidance

Exam Time

AAPC format guidance

70%

Passing Score

AAPC format guidance

$399/$499

Core Exam Pricing

AAPC support pricing page

200

Practice Questions Here

OpenExamPrep COC bank

2026

Policy Refresh

OPPS/OCE-aligned update cycle

AAPC lists COC (formerly CPC-H) as a 100-question, 4-hour certification exam using a 70% passing threshold. For 2026, high-yield prep should center on outpatient facility diagnosis sequencing, OPPS status indicators/APC packaging, OCE and NCCI edit handling, and defensible documentation-to-code linkage.

Sample COC (Formerly CPC-H) Practice Questions

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1Case 001 (First-Listed Diagnosis): During a hospital outpatient coding quality review, the team must finalize a same-day claim. The record lists multiple chronic conditions and one acute reason for today's visit. Which diagnosis should be sequenced first on the outpatient facility claim?

A.Always sequence the most severe chronic condition first regardless of encounter focus.

B.Sequence the condition chiefly responsible for the outpatient encounter after applying ICD-10-CM instructions.

C.Sequence whichever diagnosis has the highest historical reimbursement.

D.Always sequence a symptom code first even when a definitive diagnosis is documented.

Explanation: Outpatient first-listed diagnosis selection is based on the reason chiefly responsible for services provided, with coding conventions applied.

2Case 002 (POA Indicators in Outpatient): At a facility revenue integrity huddle, coders are reconciling a pre-bill edit queue. A new coder asks whether Present on Admission indicators are required on this hospital outpatient claim. What is the best response?

A.POA indicators are required on every UB claim line regardless of setting.

B.POA indicators are required only when modifier 25 is reported.

C.POA reporting is an inpatient requirement and is generally not required on hospital outpatient claims.

D.POA indicators are optional only for emergency department claims.

Explanation: POA indicators are associated with inpatient reporting rules, not standard outpatient hospital claim construction.

3Case 003 (ICD-10-CM Conventions): In a late-charge audit, documentation and coded lines are being validated before rebilling. A diagnosis code includes a "use additional code" note. What is the most compliant coding action?

A.Ignore instructional notes if the base diagnosis appears complete.

B.Replace the base diagnosis with a revenue code instead of adding another diagnosis.

C.Add unspecified diagnosis codes until the claim passes internal edits.

D.Follow the instructional note and report the additional code when supported by documentation.

Explanation: ICD-10-CM instructional notes are binding and guide whether additional diagnosis reporting is required.

4Case 004 (CPT/HCPCS Selection): While preparing month-end compliance reports, coding staff are checking APC logic and edits. For a documented outpatient procedure, which step should happen before assigning the final CPT/HCPCS code?

A.Validate the procedure note for approach, anatomy, and service details against code descriptors.

B.Select the highest-paying code in the related section first.

C.Assign a placeholder HCPCS code and wait for payer edits to determine final coding.

D.Code only from the physician order without reviewing the completed procedure documentation.

Explanation: Accurate facility coding starts with complete procedural documentation mapped to the most specific descriptor.

5Case 005 (Modifier 25): During a payer denial appeal review, a coding lead is validating outpatient claim construction. An E/M visit and minor procedure are billed on the same date. When is modifier 25 appropriate on the E/M service?

A.Whenever any procedure occurs on the same day as an E/M encounter.

B.When documentation supports a significant, separately identifiable E/M service beyond usual pre/post work.

C.Only when the procedure is denied by the payer initially.

D.Only when diagnosis codes differ across line items.

Explanation: Modifier 25 requires distinct E/M work that is separately supported in the record.

6Case 006 (Modifier 59/X{EPSU}): In a focused internal audit, the facility is assessing diagnosis sequencing and modifier usage. Two services trigger an outpatient bundling edit. Which documentation supports modifier 59 or an X{EPSU} subset most defensibly?

A.A desire to prevent denial without additional documentation.

B.A shared diagnosis on both service lines.

C.Clear evidence of a distinct encounter, structure, practitioner, or separate service context as defined by policy.

D.A routine standing order to append modifier 59 on second procedures.

Explanation: Modifier 59/X modifiers should reflect documented distinctness, not automated denial management.

7Case 007 (Modifier 73/74): During OPPS education rounds, a senior coder is coaching a new analyst through a complex case. A planned outpatient procedure is discontinued. Which key distinction guides modifier 73 versus 74 selection?

A.Whether the procedure was scheduled in the morning or afternoon.

B.Whether the physician and facility use the same diagnosis code.

C.Whether the claim contains one line item or multiple lines.

D.Whether the discontinued event occurred before versus after anesthesia administration/procedure start criteria.

Explanation: Modifier 73/74 usage depends on timing and procedural progression, which must be supported in documentation.

8Case 008 (HCPCS Drug Units): At a quarterly coding committee meeting, a disputed outpatient encounter is re-reviewed. An injectable drug appears on the outpatient claim with quantity concerns. What should the coder verify first?

A.HCPCS descriptor unit definition and administered versus billable quantity from the medication record.

B.Charge amount only, since unit fields are payer-adjusted automatically.

C.Only pharmacy acquisition cost without dose documentation.

D.Revenue code selection alone without checking HCPCS unit rules.

Explanation: Drug claims require accurate unit conversion from documented dose and HCPCS descriptor unit definitions.

9Case 009 (OPPS Status Indicators): In a utilization and charging review, facility teams compare clinical documentation to billed services. A service line is paid unexpectedly low under OPPS. Which data element is most important to review first?

A.The patient's home ZIP code.

B.The HCPCS status indicator that determines payment, packaging, or separate reimbursement behavior.

C.The claim form font and print settings.

D.The facility's historical average reimbursement for unrelated claims.

Explanation: Status indicators are core OPPS drivers for whether items package, bundle, or pay separately.

10Case 010 (APC Packaging): During a mock certification exercise, a coder must choose the most defensible facility coding decision. A supply charge was denied as packaged. Which interpretation is usually correct under OPPS?

A.Any denied line indicates coding error and must always be rebilled separately.

B.Packaged items are inpatient-only and never appear on outpatient claims.

C.Certain ancillary items are packaged into a primary APC payment and are not separately payable.

D.Packaging applies only when no diagnosis code is reported.

Explanation: OPPS includes packaging policies where some supportive services are included in primary payment logic.

About the COC (Formerly CPC-H) Exam

COC (formerly CPC-H) is AAPC's hospital outpatient coding credential. It emphasizes facility coding decisions for OPPS/APC payment logic, ICD-10-CM diagnosis assignment, CPT/HCPCS reporting, and outpatient compliance controls.

Questions

100 scored questions

Time Limit

4 hours

Passing Score

70%

Exam Fee

$399 one attempt / $499 two attempts (AAPC)

COC (Formerly CPC-H) Exam Content Outline

High

Outpatient Diagnosis and Procedure Selection

First-listed diagnosis logic, ICD-10-CM conventions, CPT/HCPCS code selection, and modifier documentation support

High

OPPS, APC, and OCE Logic

Status indicators, APC packaging/composites, and structured OCE edit investigation workflow

Medium

Revenue Integrity and Charge Capture

CDM/revenue code alignment, charge reconciliation, and late-charge control design

Medium

Medical Necessity and Denial Root Cause

LCD/NCD alignment, evidence-based denial analysis, and appeal-ready documentation

Foundation

Compliance and Audit Trail Management

NCCI checks, correction audit trails, observation/ED case integration, and defensible rebilling practices

How to Pass the COC (Formerly CPC-H) Exam

What You Need to Know

Passing score: 70%
Exam length: 100 questions
Time limit: 4 hours
Exam fee: $399 one attempt / $499 two attempts

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

COC (Formerly CPC-H) Study Tips from Top Performers

1Build a repeatable claim-validation sequence: documentation abstraction, code assignment, OPPS checks, then edit review

2Practice status-indicator and APC packaging decisions daily until payment behavior is predictable

3Use denial logs to map recurring root causes back to coding or charge-capture workflow defects

4Treat modifier usage as evidence-driven decisions, not denial-avoidance defaults

5Document all corrections with clear audit-trail notes including reason, source, and effective rebill action

Frequently Asked Questions

Is CPC-H still the active AAPC exam name?

AAPC now brands this credential as COC (Certified Outpatient Coder). Many employers and candidates still reference the legacy CPC-H name, so both terms are commonly used in job postings and study discussions.

What is the COC/CPC-H exam format?

AAPC's current format aligns to 100 questions in a 4-hour testing window with a 70% passing requirement for this certification track.

What makes COC different from CPC?

COC is hospital outpatient facility-focused, with stronger emphasis on OPPS/APC payment behavior, OCE edits, and facility claim construction. CPC is primarily physician/outpatient professional coding focused.

Which COC topics usually cause the most misses?

Common high-friction areas include status-indicator interpretation, APC packaging/composite logic, modifier use under NCCI rules, and medical-necessity support for denied outpatient services.

How should I prepare for COC in 2026?

Use case-based practice in blocks: 1) diagnosis + CPT/HCPCS assignment, 2) OPPS/APC/OCE validation, 3) denial root-cause writeups, and 4) final claim QA with documentation traceability.