COC Domain 1: Medical Terminology (7%) - Complete Study Guide 2026
Domain 1: Medical Terminology represents 7% of the COC exam, translating to approximately 7 questions out of the 100 total multiple-choice questions.
COC Domain Deep Dives
Domain Deep Dives for the Certified Outpatient Coder (COC) exam - 11 in-depth guides to help you prepare with confidence. Browse all study resources or jump straight into a guide below.
COC Domain 10: Cases (10%) Complete Study Guide 2026
The Certified Outpatient Coder (COC) exam, administered by the AAPC, is divided into ten official domains.
COC Domain 2: Anatomy (7%) - Complete Study Guide 2026
The Anatomy domain represents 7% of the COC exam content, which means you can expect approximately 7 questions on your 100-question test.
COC Domain 3: Coding Guidelines (3%) - Complete Study Guide 2026
Domain 3: Coding Guidelines represents 3% of the COC exam content, translating to approximately 3 questions out of the 100 total questions on your...
COC Domain 4: Payment Methodologies (13%) - Complete Study Guide 2026
Payment Methodologies represents 13% of the COC exam content, making it one of the more substantial domains you'll encounter.
COC Domain 5: Compliance (3%) - Complete Study Guide 2026
Domain 5 represents 3% of the COC exam content, translating to approximately 3 questions out of the total 100 multiple-choice questions.
COC Domain 6: ICD-10-CM (15%) - Complete Study Guide 2026
ICD-10-CM represents one of the most critical domains on the COC exam, accounting for 15% of all questions.
COC Domain 7: HCPCS Level II (7%) - Complete Study Guide 2026
HCPCS Level II represents 7% of the COC exam content, making it a crucial domain for certification success.
COC Domain 8: CPT (13%) Complete Study Guide 2026
The Certified Outpatient Coder (COC) credential, awarded by the AAPC, is built around ten measurable knowledge domains.
COC Domain 9: Surgery and Modifiers Complete Study Guide 2026
The AAPC's Certified Outpatient Coder credential is built around ten domains, but none carries more weight than Domain 9: Surgery and Modifiers.
COC Exam Domains 2026: Complete Guide to All 7 Content Areas
Understanding the COC exam domains is the foundation of effective exam preparation. The Certified Outpatient Coder exam tests knowledge across seven...
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