Certified Billing and Coding Specialist (NHA) Exam Study Guide

The CBCS exam is a knowledge assessment for entry-level billing and coding roles, so your preparation should span the full revenue cycle — from the moment a patient checks in to the moment a claim is paid or appealed. Focus your study across these core areas:

Coding Systems

• ICD-10-CM — diagnosis coding, including conventions, guidelines, and combination codes.
• CPT — procedure and service coding, including the correct use of modifiers.
• HCPCS Level II — supplies, drugs, and durable medical equipment codes.

The Revenue Cycle and Claims

• Patient registration, insurance verification, and eligibility.
• Charge capture and correct linkage of diagnosis codes to procedures (medical necessity).
• Completing and submitting the CMS-1500 claim form and understanding clean-claim requirements.
• Reading remittance advice, posting payments, and managing denials, appeals, and rejections.

Payers, Compliance, and Regulations

• Payer types: Medicare, Medicaid, commercial plans, and workers' compensation.
• Reimbursement methodologies and the coordination of benefits.
• Compliance frameworks such as HIPAA privacy and security, fraud and abuse, and fair collection practices.

Because billing and coding is fundamentally a sequential process, weakness in one domain tends to cascade into others — an incorrect diagnosis code, for example, can trigger a denial that then requires appeals knowledge to resolve. Studying the domains as a connected workflow rather than as isolated silos generally produces stronger recall on scenario-based questions.

Structuring Your Preparation

Because the 180-minute window is generous relative to the 100 scored questions, your study effort is best spent on breadth of accuracy rather than on speed drills. Build a plan that cycles through every domain at least twice: an initial learning pass to establish concepts, and a second review pass driven by practice questions to surface gaps.

• Anchor to the code books. Because the CBCS tests coding conventions, practice navigating ICD-10-CM, CPT, and HCPCS references until lookups feel automatic.
• Practice with scenarios. Many billing questions are situational — a patient encounter, a rejected claim, a compliance dilemma. Work through cases end-to-end.
• Track weak domains. Log which topics generate the most errors and concentrate your final review there.

Managing the Clock on Test Day

At an average of about 1.8 minutes per scored question, you can afford to read each item carefully. A practical approach is to answer the questions you are confident about on a first pass, flag uncertain items, and return to them with your remaining time. Because leaving a question blank cannot earn credit, make sure every question has a response before you submit — an educated guess is always better than an omission.

Before You Register

The exam costs $129, so treat your first attempt as the one that counts: sit for it only once your practice scores are consistently comfortable above passing. Budgeting a single well-prepared attempt is more economical than paying to retake the exam.