Complete and sign a Retired Health Insurance Premium Reimbursement Claim Form for each period of coverage to be reimbursed. To file a claim, you must submit a Medi-Cal Claim Form for Beneficiary Reimbursement.Enter the nine-digit PAYERID number of the Medigap insurer. Practitioners sending professional and supplier claims to L.A. Care Health Plan on paper must use Form CMS 1500 in the latest valid version. Instructions to fill out this form: • Complete ALL account holder information. • Provide your employer name without abbreviation. Fill out the following form and mail to the address below or file online. How do I file a claim? You can download and fill out a form, called the Patient Request for Medical Payment form (CMS-1490S). Read entire claim form thoroughly. 2.