What the appeal letter must contain
Checked against the current rules on September 18, 2026.
A Medicare Advantage reconsideration request doesn't have a required CMS form — you send a letter, wherever the notice itself says to send it.42 CFR 422.582
What separates a letter that gets taken seriously from one that doesn't isn't length — it's whether it argues from the actual rule, not just the family's own sense that the denial was unfair.
A plan reviewer reads a lot of these. A letter that names the rule and connects it to the specific facts of the case reads as something that has to be taken seriously and answered on the merits — a letter that just restates disagreement is easy to uphold with the same boilerplate language as the original denial.
The identifying information
The enrollee's name, Medicare number, the plan name, and the date and reference number on the denial notice — so the plan can find the case immediately, not search for it.
If someone else is filing on the enrollee's behalf, that's also where the Appointment of Representative form comes in — without it attached, the plan isn't required to talk to anyone but the enrollee directly.
The rule it argues from
The strongest letters name the specific coverage rule that applies to the denied service and explain how the facts of the case meet it — not just "this should be covered," but why, under the rule the plan is bound by.
This is exactly where a generic template falls short — it has no way to know which specific rule governs a given denial, so it either omits this section entirely or fills it with something too vague to actually engage with.
The facts that meet the rule
Whatever specific facts the applicable rule turns on — dates, test results, physician orders, records of daily care — stated plainly, tied to the rule point they support.
A fact that isn't tied to a specific part of the rule reads as background, not evidence. The letter should make the connection explicit rather than leaving the reviewer to make it.
The request itself
A clear statement of what's being requested — that the plan reverse its denial — and, for a pre-service or urgent situation, a request for expedited review if it qualifies.42 CFR 422.584
The enclosures
A list of what's attached — the evidence the specific rule calls for — so the reviewer knows what to actually look at.
Questions people ask
- Can I use a generic online template?
- A generic template usually states that you disagree, without connecting the facts of your case to the specific Medicare rule that governs that kind of denial — which is exactly what a plan reviewer is checking for.
- Do I need a lawyer to write it?
- No — a first-level reconsideration letter doesn't require legal representation. It does need to cite the right rule and the right facts, which is what CaseWhy Appeals' free preview shows you before you decide anything.
Sources — last checked September 18, 2026
- 42 CFR 422.582as of September 18, 2026
- 42 CFR 422.584as of September 18, 2026
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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.
