If you receive a subrogation letter, it will be some time after the accident. Subrogation is an arrangement between insurance companies to prevent insured parties from receiving double compensation.A Subrogation Letter should clearly state the facts of the case, including details of the incident (e.g. Find resources and instructions for submitting a claim, including how file a claim in a timely manner and how to dispute a claim. Items 16 below must be completed (see instructions on page 2). 1. Check one box below for the case type that best describes this case:. If you are to recover money from a third party in a personal injury claim and the health insurance company has paid for your care they're entitled to be reimbursed. Your health insurance company has a contractual right to reimbursement if you recover your medical bills in a personal injury settlement. Practically all insurance companies have the right to seek reimbursement through subrogation. Management Agency for Santa Clara County.