Medicare Part A
Part A is not physician office claims. Those are generally Part B. This page does not decide whether a stay is covered.
Source: Medicare.gov, What Part A covers. Page read October 14, 2026.
← Glossary
Definition
Medicare Part A
Medicare Part A is hospital insurance. It helps pay for inpatient hospital care, skilled nursing facility care after a qualifying stay, some home health, and hospice. It is part of Original Medicare. A Medicare Advantage plan must cover Part A benefits. The inpatient grouper lookup is at /drg.
Questions
Medicare Part A, answered
Is an MS-DRG a Part A code?
An MS-DRG groups an inpatient stay for hospital payment under Part A. It is not a diagnosis code and not a Part B procedure code.