AAPC Cheat Sheet 2026

The 30 highest-yield AAPC facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. The False Claims Act (FCA) penalizes providers who: → Knowingly submit false or fraudulent claims for payment to the federal government
2. What is a sliding fee scale used for in healthcare? → Setting patient fees based on income and ability to pay
3. Which guideline emphasizes coding only the conditions that affect patient care? → Only conditions treated or addressed during the encounter are coded
4. What is a credit balance on a patient account? → An amount owed back to the patient or payer because they were overcharged or overpaid
5. What is the purpose of exclusions in an insurance policy? → To identify services not covered by the policy
6. What is a 'corrected claim'? → A resubmission of a previously processed claim with corrections to specific data elements
7. What is a Diagnosis-Related Group (DRG) payment system used for? → A prospective payment system for inpatient hospital stays based on diagnosis
8. Which document is most important to include when appealing a claim denied for 'medical necessity'? → Physician's clinical documentation and supporting medical records
9. What does the prefix 'hyper-' mean in medical terminology? → Excessive or above normal
10. A biller receives a denial for 'missing or invalid modifier.' What is the correct course of action? → Review the procedure code, determine the correct modifier, and resubmit a corrected claim
11. Which document outlines the insurance company's payment decision? → Explanation of Benefits (EOB)
12. What does the HIPAA Security Rule specifically protect? → Electronic Protected Health Information (ePHI)
13. What is the role of a clearinghouse in medical billing? → It acts as an intermediary that scrubs and transmits claims between providers and payers
14. What is the purpose of internal audits in billing compliance? → To improve billing accuracy and detect errors
15. Which coding system is primarily used for outpatient procedures? → CPT
16. What is the primary role of a patient financial counselor? → To help patients understand their financial obligations and available assistance options
17. Why is accurate coding important for claims adjudication? → It speeds up the claim payment and prevents denials
18. What does the term 'clean claim' mean? → A claim submitted without errors or omissions
19. What does an 'accounts receivable aging report' track? → Outstanding balances categorized by how long they have been unpaid
20. What is 'charge capture' in the revenue cycle? → The process of recording all billable services provided to a patient
21. What is a deductible in an insurance contract? → Out-of-pocket amount before insurance pays
22. What is the difference between an HMO and a PPO plan? → PPO allows more provider choice without referrals
23. Which type of appeal is submitted directly to an independent external reviewer when internal payer appeals are exhausted? → External appeal
24. What is coordination of benefits (COB)? → Determining which insurer pays first
25. What does the term 'comorbidity' mean? → A co-existing condition alongside a primary diagnosis
26. What is the timely filing limit for insurance claims? → Typically 90 days to one year after service
27. What does 'timely filing' refer to in medical billing? → Submitting claims to payers within their specified deadline after the date of service
28. A claim is denied because the rendering provider's NPI is not on file with the payer. What should the biller do? → Contact the payer to credential/enroll the provider and then resubmit the claim
29. What is the first step a biller should take when a claim is denied due to 'coordination of benefits' (COB)? → Verify primary and secondary insurance information and resubmit in correct order
30. What is the purpose of an Explanation of Benefits (EOB) in the denial management process? → It details payer decisions including payment amounts, adjustments, and denial reasons