You just got a letter that says some of your ER bill may be covered by "MedPay," and nobody has explained whether that helps you or hurts your case. MedPay is short for medical payments coverage, a type of insurance that pays for reasonable medical treatment after an injury without waiting to decide who caused the accident. It most often shows up on auto policies, and in some situations on homeowners policies as "medical payments to others." The limits are usually low - often a few thousand dollars - but it can help with ambulance charges, hospital bills, X-rays, or follow-up care fast.

What to do: ask for the policy limits, what bills they will pay, and whether payment goes straight to the provider or reimburses you. Keep every bill, receipt, and discharge paper. MedPay is different from liability coverage and different from PIP (personal injury protection), which exists in some states and can cover more than medical bills.

For an injury claim, MedPay can keep collections off your back while your personal injury claim is still being sorted out. But watch for a lien, subrogation, or reimbursement claim later - your insurer may want to be paid back from a settlement. Because most insurance rules are state-based, whether MedPay is required, optional, or limited depends on your state.