You have no legal obligations to respond to a subrogation letter. A subrogation lien claim arises when a thirdparty (usually your health insurance company) seeks reimbursement for expenses paid on your behalf.Insurance companies can utilize this letter template to seek reimbursement from the person or entity legally responsible for a loss. Subrogation is a legal doctrine that enables an insurance company to step into the shoes of its insured party (the policyholder) after settling a claim. Thirtythree years of subrogation litigation experience has distilled ten of the most common mistakes which we see clients continuing to make. VA Subrogation – Request VA Medical Bills. For questions about billing, your claims, medical records, or expenses, log into your secure Medicare account, or call us at 1-800-MEDICARE. AmeriHealth Caritas Florida strongly encourages our providers to submit claims electronically through Electronic Data Interchange (EDI). Direct claim entry through Change Healthcare. Meridian is now part of Carelon Insights.