Why insurance and coding are on the CCMA exam

Every CCMA working in an outpatient setting interacts with the medical billing system — verifying insurance benefits, obtaining pre-authorizations, posting payments, and helping patients understand their bills. The NHA CCMA exam content outline includes medical insurance, billing, and coding as an administrative domain. The candidate who understands the payer types, the claim process, and the basic code sets answers the billing questions correctly and supports the financial health of the practice.

This post covers the major insurance payer types, the claim lifecycle, the three main code sets (ICD-10, CPT, HCPCS), the CMS-1500 claim form, the explanation of benefits (EOB), and the exam's favorite questions on each.

Insurance payer types

Commercial insurance

Employer-sponsored or individually purchased insurance plans. Examples include Blue Cross Blue Shield, Aetna, Cigna, United Healthcare, and Kaiser Permanente. Commercial plans vary widely in their coverage, copays, deductibles, and networks. The CCMA verifies the patient's specific plan benefits before non-emergent services.

Medicare

Federal insurance for people 65 and older, certain people with disabilities, and people with end-stage renal disease. Medicare has multiple parts:

• Part A — hospital insurance. Inpatient care, skilled nursing, hospice, some home health. Most beneficiaries pay no premium.
• Part B — medical insurance. Outpatient care, physician services, durable medical equipment, preventive services. Premium-based.
• Part C (Medicare Advantage) — private plans that combine Part A, Part B, and often Part D coverage.
• Part D — prescription drug coverage, offered through private plans.

Medicaid

Joint federal-state insurance for people with low income, certain people with disabilities, and certain pregnant people. Coverage and eligibility vary by state. The CCMA verifies state-specific Medicaid eligibility and may participate in Medicaid managed care plans.

TRICARE

Insurance for active-duty military, retirees, and their families. Administered by the Department of Defense. Different plans (Prime, Standard, Extra, Reserve Select) with different rules.

Workers' compensation

Insurance that covers work-related injuries and illnesses. Required by law in most states for employers. The CCMA's role includes verifying the claim, obtaining the claim number, and documenting the injury or illness per the workers' compensation carrier's requirements.

Self-pay

Patients without insurance. The CCMA informs the patient of the cost, collects payment at the time of service, or arranges a payment plan.

Insurance terminology the exam tests

• Premium — the amount paid for the insurance plan, usually monthly.
• Deductible — the amount the patient pays before insurance begins to pay.
• Copay (copayment) — a fixed amount the patient pays for a covered service (e.g., $25 for an office visit).
• Coinsurance — a percentage of the cost the patient pays after the deductible is met (e.g., 20% of allowed amount).
• Allowed amount — the maximum the insurance will pay for a covered service. The provider agrees to accept this amount as payment in full for in-network services (contractual adjustment).
• Out-of-pocket maximum — the maximum the patient will pay in a plan year. After this, insurance pays 100% of covered services.
• In-network — providers and facilities that have contracted with the insurance plan. Out-of-network providers may cost the patient more.
• Pre-authorization (prior authorization) — approval from the insurance company before a service is provided.
• Referral — an order from the primary care provider for the patient to see a specialist.
• Explanation of Benefits (EOB) — a statement from the insurance company explaining what was paid, what was applied to the deductible, and what the patient owes.
• Coordination of Benefits (COB) — when a patient has two insurance plans, the rules for determining which plan pays first.
• Birthday rule — for dependent children with two insurance plans, the plan of the parent whose birthday falls earlier in the year pays first.

The claim lifecycle

1. Patient registration — demographics and insurance information collected and verified.
2. Encounter — the patient is seen; the provider documents the visit.
3. Coding — the encounter is coded with ICD-10 (diagnosis), CPT (procedure), and HCPCS (supplies and services not in CPT) codes.
4. Charge entry — the codes and charges are entered into the billing system.
5. Claim submission — the claim is submitted to the insurance company electronically (most common) or on paper (CMS-1500 form).
6. Adjudication — the insurance company processes the claim, applying the patient's benefits and the provider's contracted rate.
7. EOB / remittance — the insurance company sends an EOB to the patient and a remittance advice to the provider, showing what was paid and what is the patient's responsibility.
8. Patient billing — the patient is billed for the amount owed (copay, coinsurance, deductible, non-covered services).
9. Collections — if the patient does not pay, the practice follows its collections process, which may include sending to a collection agency.

The three code sets

ICD-10 (International Classification of Diseases, 10th Revision, Clinical Modification)

The diagnosis coding system used in the United States. Every claim requires at least one ICD-10 code that justifies the reason for the encounter. The format is alphanumeric:

• Letter — chapter (e.g., E for endocrine, I for circulatory, J for respiratory, K for digestive, M for musculoskeletal).
• Two digits — the category.
• Decimal point.
• Up to four additional characters — etiology, anatomic site, severity, and other clinical details.

Example: E11.9 — Type 2 diabetes mellitus without complications.

ICD-10 codes must be coded to the highest level of specificity. The exam tests whether the CCMA can identify the basic structure of an ICD-10 code and what information each character conveys.

CPT (Current Procedural Terminology)

The procedure coding system published by the American Medical Association. Used for billing physician and other professional services.

CPT categories:

• Category I — five-digit numeric codes for widely performed procedures and services. Updated annually.
  • 99202 to 99215 — Evaluation and Management (E/M) codes for office visits, categorized by new vs. established patient and complexity.
  • 99281 to 99285 — Emergency department visits.
  • 90460 to 90474 — Immunization administration.
  • 93000 to 93010 — EKG procedures.
  • 36415 — Routine venipuncture for blood collection.
  • 80047 to 89398 — Laboratory procedures.
• Category II — alphanumeric tracking codes for performance measurement (optional).
• Category III — alphanumeric temporary codes for emerging technology, services, and procedures.
• HCPCS Level II — alphanumeric codes for supplies, equipment, and services not in CPT (durable medical equipment, ambulance services, drugs administered in the office).

Modifiers are two-character add-ons that provide additional information about a procedure:

• -25 — significant, separately identifiable E/M service on the same day as a procedure.
• -59 — distinct procedural service.
• -76 — repeat procedure by the same provider.
• -77 — repeat procedure by a different provider.

The exam tests the CCMA's recognition of the code categories and the modifiers commonly used in the office setting.

HCPCS Level II

The Healthcare Common Procedure Coding System, Level II, is the standard code set for products, supplies, and services not included in CPT. Examples:

• J-codes — drugs administered in the office (J0696 for ceftriaxone, J1100 for dexamethasone).
• A-codes — supplies, including injection supplies and dressings.
• E-codes — durable medical equipment.
• G-codes — temporary codes for procedures and services.
• L-codes — orthotics and prosthetics.

The CMS-1500 claim form

The standard paper claim form for professional services, though most claims are submitted electronically using the 837P format. The CMS-1500 has 33 form locators (boxes) that collect patient demographics, insurance information, the diagnosis and procedure codes, the provider's information, and the charge. The CCMA may not submit claims directly, but must understand the form to troubleshoot denials and verify data.

Key boxes:

• Box 1 — insurance program (Medicare, Medicaid, TRICARE, Champva, Group, FECA, Other).
• Box 1a — insured's ID number.
• Box 2 — patient's name.
• Box 3 — patient's date of birth and sex.
• Box 4 — insured's name.
• Box 21 — diagnoses (up to 12 ICD-10 codes, with the primary listed first).
• Box 24A through 24J — service line detail (dates, place of service, CPT/HCPCS codes, charges, units, provider ID).
• Box 31 — signature of the provider.

Coding rules the exam tests

• Medical necessity — the diagnosis must justify the procedure. A diagnosis of hypertension does not justify a chest X-ray; a diagnosis of pneumonia does.
• Highest level of specificity — code to the most specific ICD-10 code available, including laterality (right vs. left) and encounter type (initial, subsequent, sequela).
• Code to the highest level of CPT — use the most specific CPT code. The visit level (99213 vs. 99214) is determined by medical decision-making or total time.
• Primary diagnosis first — the first-listed diagnosis is the primary reason for the encounter.
• Code what was done, not what was considered — if a test was ordered but not performed, it is not coded.

The exam's favorite billing and coding questions

Question type 1: "A patient with Medicare and an employer-sponsored plan asks which is primary. What is the correct answer?" — Answer: the employer-sponsored plan is primary for an active employee; Medicare is secondary. After retirement, Medicare is primary.

Question type 2: "Which code set is used for diagnoses?" — Answer: ICD-10-CM.

Question type 3: "A patient is seen for a well-child visit and a sick visit on the same day. How is this coded?" — Answer: with appropriate E/M codes for each visit, with modifier -25 on the well-child or sick visit code as needed to indicate a separately identifiable service.

Question type 4: "A claim is denied for lack of medical necessity. What does that mean?" — Answer: the diagnosis code does not justify the procedure. The provider's documentation must support the medical necessity of the service.

A practical closing note

Insurance, coding, and billing are the financial backbone of the practice. The CCMA who verifies benefits correctly, obtains pre-authorizations, and understands the basic code sets supports the practice's revenue cycle and the patient's financial experience. The exam rewards the candidate who knows the payer types, the basic code structure, and the rules that prevent denials.

Practice reading EOBs and identifying the allowed amount, the patient responsibility, and the contractual adjustment. Practice the ICD-10 and CPT code formats. Practice the coordination of benefits rules for common scenarios (Medicare with employer coverage, dependent children with two parents, divorced parents). The CCMA who owns the billing side owns the practice's financial health.

For insurance and coding practice — payer types, code sets, EOB interpretation, and claim lifecycle — visit the ExamReady CCMA prep site. Every question maps to the NHA CCMA content outline, so you study exactly what the exam will ask.