Claim A claim is a request for payment for services and benefits you received. Claims are also called bills for all Part A and Part B services billed through Fiscal Intermediaries. "Claim" is the word used for Part B physician/supplier services billed through the Carrier. Legislation Files Containing This Term: legislation/45CFR-160.103.html legislation/45CFR-162.1101.html legislation/45CFR-162.1102.html legislation/45CFR-162.1401.html legislation/45CFR-162.1402.html legislation/45CFR-162.1602.html legislation/45CFR-162.1802.html legislation/45CFR-162.920.html legislation/45CFR-164.508.html legislation/45CFR-164.512.html