Answer_Book / Medicare_Secondary_Payer_Billing_Rules / Who_pays_first

Why This Topic Matters

Knowing the primary payer is essential for correct claim submission, avoiding denials, and coordinating benefits appropriately when Medicare is secondary or primary depending on the circumstance.

Article Sections

1. Who pays first? Medicare vs. other insurers

   An overview of how to determine which coverage is billed first in Medicare secondary payer situations. The section introduces the chart-based approach and the need to consider multiple factors before making a billing decision.

2. MSP questionnaire reference

   A brief note about using a questionnaire tool to gather information needed for Medicare primary-versus-secondary determinations. It focuses on documenting coverage details rather than specific coding guidance.

3. Medicare secondary payer decision chart

   A chart covering common payer-order scenarios involving employer coverage, retiree coverage, disability, end-stage renal disease, COBRA, workers’ compensation, black lung, accident-related coverage, and Veterans Health Administration benefits. The section summarizes general coordination-of-benefits categories by situation.