Original Medicare denied claims on an MSP demand that aren't related to your accident or injury? What the rule says and how to appeal.
Checked against the current rules on September 24, 2026.
A denial for claims on an MSP demand that aren't related to your accident or injury isn't the end of the story — Original Medicare has to follow specific coverage rules, and a denial that doesn't square with those rules is exactly the kind of appeal that tends to win.
Here's what the rule actually requires, what evidence usually turns a denial around, and the deadline you're working against.
What the rule requires
Which claims Medicare can include in a Secondary Payer recovery demand is governed by§ 411.24 Recovery of conditional payments.. Original Medicare generally cannot apply a stricter test than what these rules require.
Questions that decide it
Before you appeal, these are the facts that usually decide whether a denial like this holds up:
Does the demand include treatment for a condition that existed before the accident, or one unrelated to the injury itself?
Does the demand include claims from well before the accident date, or well after treatment for the injury clearly ended?
Did the settlement itself explicitly limit what the payment covered — for example, a specific body part or a specific type of injury?
What a winning appeal has to show
An appeal that wins usually includes:
The Payment Summary Form (PSF) listing every claim the BCRC included — This is the actual list to check line by line — the dispute has to name which specific claims don't belong, not just assert the total feels too high. (You or your family provide this.)
Medical records showing the disputed treatment was for a different, unrelated condition — The BCRC removes a claim from the demand once it's shown the treatment wasn't related to the accident or injury the settlement covers. (Your doctor's office provides this.)
The settlement agreement's own language describing what it covers — A settlement that's explicitly limited to a specific injury or body part is real, direct evidence that unrelated claims don't belong on the demand. (You or your family provide this.)
Your deadline to appeal
120 days from the date of the demand letter — 120 calendar days from when you receive it (42 CFR § 405.942(a), applied to MSP recovery), with the same 5-day receipt presumption.42 CFR 405.942
Your Medicare contractor itself then has its own clock to decide. 60 calendar days from when the BCRC receives your timely request, the same Subpart I timing the standard claims ladder uses (42 CFR § 405.950).
Questions people ask
- Can your Medicare contractor just say it's "not medically necessary" with no further explanation?
- The denial notice has to explain the basis for the decision and tell you how to appeal. If it doesn't point to a specific rule or criteria, that's itself worth raising in your appeal — you're entitled to know what standard was applied.
- What if I don't have all the evidence listed above?
- Include what you have. An appeal with partial evidence and a clear explanation of the rule still gets a real review — it doesn't need to be complete to be worth filing.
Sources — last checked September 24, 2026
- § 411.24 Recovery of conditional payments.as of September 24, 2026
- 42 CFR 405.942as of September 23, 2026
Related
Not sure what applies to your case?
Upload your denial letter and get a free, plain-language explanation with your real deadline.
By CaseWhy Appeals editorial. See how this content is produced. Not legal advice. Not affiliated with or endorsed by Medicare, CMS, or any health plan. A product of CaseWhy LLC.
