1. Professional uniform insurance claim form developed and approved by the American Medical Association Council on Medical Service and the Centers for Medicare and Medicaid Services. The version in current use is the CMS-1500 (08-05). It is also known as the UCF-1500 . It is used by physicians and other professionals to bill outpatient services and supplies to Medicare, TRICARE, and some Medicaid programs, as well as some private insurance carriers and managed care plans. Formerly known as HCFA-1500 . 2. For electronically transmitted professional claims, the 837P replaces the paper CMS-1500 form and the electronic national standard format (NSF). 3. In Medicare fraud, altering insurance claim forms to obtain a higher payment amount.