Certified Professional Coder (CPC) Exam Study Guide

100 multiple-choice questions.

240 minutes (4 hours).

70%.

$425 for a single attempt.

About 2.4 minutes per question (240 minutes ÷ 100 questions), so pace yourself and flag hard items to revisit.

With a 70% cutoff on 100 questions, you can miss up to 30 and still pass (70 correct needed).

CPT (Current Procedural Terminology) codes report physician and outpatient procedures and services. It is a core code set tested on the CPC.

ICD-10-CM reports diagnoses (the patient's condition or reason for the encounter), not procedures.

HCPCS Level II codes report supplies, drugs, durable medical equipment, and services not covered by CPT (Level I).

A two-character code appended to a CPT/HCPCS code to indicate a service was altered without changing its definition (e.g., -25, -59, -50, -RT/-LT).

Evaluation and Management — codes for patient visits/encounters. E/M is heavily tested and now driven mainly by medical decision making (MDM) or total time.

A single payment covering the surgery plus related pre-op and post-op care within the global period, so those routine services aren't billed separately.

In CPT, text before a semicolon in a parent code is common to all indented child codes below it; read the parent to get the full descriptor of the child.

The CPC is open-code-book: examinees use current CPT, ICD-10-CM, and HCPCS Level II manuals. Knowing your books' layout and tabs saves critical time.

Bundled codes combine related procedures into one code, paying a single fee, while unbundled codes bill component procedures separately. Avoiding improper unbundling is critical for CPC compliance.

Add-on codes (identified by a '+' symbol) describe additional work during the same session as a primary procedure. They are always billed alongside a base code and never independently.

Status indicators (A, B, C, etc.) show how each CPT code is treated under the fee schedule: whether it is paid under the fee schedule, bundled into another code, or has no separate payment.

The -25 modifier (Significant, Separate Service) shows a separate evaluation and management code on the same day as a procedure. The -59 modifier (Distinct Procedural Service) indicates procedures that are normally bundled but warrant separate coding for medical necessity.

A parent code is a comprehensive description that includes multiple component services. Child codes (marked by semicolons) describe subsets or components. Use semicolon convention rules to determine whether to report parent or child codes.

Codes like evaluation and management services are location-dependent, meaning the place of service (office, hospital, urgent care) affects both code selection and reimbursement. Always verify the correct place-of-service code.

OPPS is Medicare's payment model for hospital outpatient services. It groups codes into APC (Ambulatory Payment Classifications), and proper coding determines payment rate. Knowing OPPS grouping rules is essential for outpatient coding.

Unilateral codes describe services on one side; bilateral codes describe the same service on both sides. Some codes are bilateral-only; others require modifiers (-LT, -RT, -50) to show which side(s) were treated.

Reference-based pricing sets reimbursement at a fixed percent of a benchmark (often Medicare rates). Improper coding lowers claims, so choosing the highest-justified code is crucial when reference pricing is used.

An 'incident to' service is a non-physician service (nurse, PA, NP) billed under the physician's provider number at the physician's fee schedule rate. Requirements include physician supervision and direct presence at the facility.

MIPS (Merit-based Incentive Payment System) measures practice performance on quality, cost, and improvement activities. CPCs support MIPS reporting by accurately documenting and coding medical services to demonstrate quality metrics.

Medical necessity ties coding directly to clinical documentation. A service must be reasonable and necessary for the patient's condition. Coding to a higher level without support is denied as not medically necessary.

Time-based E/M codes are selected by total time spent with the patient (including non-face-to-face time for some levels). Service-based codes are selected by documented level of medical decision-making, history, and examination.

Frequency edits are payer rules that limit how often a code can be billed within a period (e.g., preventive screening once per year). Coding must respect frequency limits or claims are denied.

Linkage connects procedure codes to diagnosis codes to prove medical necessity. A procedure must be justifiable by at least one diagnosis code on the claim; weak linkage often leads to denial.

An eponym code uses a person's name (e.g., 'Smith procedure'). CPC exams may test whether you recognize eponym references and code them correctly using the exact CPT description, not the eponym name.

Coverage varies by payer, state (for Medicaid), and local Medicare Administrative Contractor (MAC) policy. CPCs must verify coverage before coding; non-covered services require proper notification to the patient before delivery.

Screening codes (e.g., preventive colonoscopy) are used when there is no symptom or prior abnormal finding. Diagnostic codes are used when evaluating an abnormality, symptom, or history. The distinction affects reimbursement and frequency rules.

When multiple procedures are performed in the same operative session, the highest-valued procedure is paid at full rate, and secondary procedures are reduced (often 50%). Primary code selection is critical to reimbursement.

Prior authorization (pre-approval from payer) is often required before coding and billing certain high-cost procedures. A CPC must verify authorization is in place and code accurately to match the authorized scope of service.