Medicare Part B
Part B drug payment often uses the average sales price file. The October 2026 ASP crosswalk on this site is effective October 1, 2026 through December 31, 2026.
Source: Medicare.gov, What Part B covers. Page read October 14, 2026.
← Glossary
Definition · Medicare program and benefits
Medicare Part B
Medicare Part B is medical insurance. It helps pay for physician services, outpatient care, and some drugs that are not taken by mouth. Many of those drugs are reported with HCPCS J codes. Part B is part of Original Medicare. The J code hub is at /hcpcs/j-codes.
Questions
Medicare Part B, answered
Are J codes Part B?
Many J codes are used on Part B drug claims. The code page shows the CMS description. It does not decide coverage.