Disease Classification & Medical Coding (30+ Q&A) | CPT, ICD-10-CM, HCPCS, Z/V Codes | 2025/2026

This compact study guide features over 30 essential questions and answers focused on the fundamentals of medical coding and disease classification systems, ideal for health information technology students, coders-in-training, and professionals preparing for certification. The content reflects 2025/2026 coding standards and includes key systems, terminology, and processes required for accurate healthcare documentation and billing. Topics covered include: Historical and modern coding systems: American Nomenclature of Disease, CPT (Current Procedural Terminology), HCPCS (Level I & II), and ICD-10-CM CPT manual structure: Six main sections (E/M, Anesthesia, Surgery, Radiology, Pathology/Lab, Medicine), code types (stand-alone, indented), symbols, and modifiers HCPCS Level II codes: Durable medical equipment, procedures, and injections for Medicare/Medicaid billing ICD-10-CM: Format, structure (Index and Tabular list), use of Z and V codes, diagnostic classifications Billing practices: Definitions and consequences of upcoding and downcoding RVUs (Relative Value Units): Quantifying provider labor and service complexity Surgical package billing: What is and isn’t separately reimbursable This guide is ideal for: Medical coding and billing students (CPC, CCS, CBCS prep) Health Information Management (HIM) programs Nursing and healthcare admin students needing basic coding knowledge Professionals preparing for exams or audits related to CPT/ICD use The Q&A format supports rapid review and memorization of high-yield content used in academic and clinical settings. Keywords: medical coding, CPT codes, HCPCS, ICD-10-CM, Z codes, V codes, upcoding, downcoding, RVUs, radiology coding, surgical package, coding systems, E/M coding, pathology, anesthesia codes, healthcare reimbursement, Medicare billing