Step 1: identify the real reason
Every denial has a reason code, and the fix depends on it. The common ones:
Missing documentation
No baseline weight, incomplete lifestyle-program records, or a missing comorbidity diagnosis. Fix: submit the records and resubmit.
Doesn't meet criteria (BMI)
Below the BMI threshold, or 27-30 without a qualifying condition. Fix: document a comorbidity if you have one, or reconsider eligibility.
Non-formulary / non-preferred
The drug isn't on your plan's preferred list. Fix: request a formulary exception (medical necessity).
Step therapy required
You must try another agent first. Fix: document the required trial, or an intolerance to it.
Weight-loss exclusion
Your plan doesn't cover weight-loss drugs at all. Fix: pivot to a covered indication, the Medicare Bridge, or cash-pay.
Match the reason to the fix
| Denial reason | The right tool | What actually overturns it |
|---|---|---|
| Missing documentation | Resubmit — not an appeal | The specific records they asked for: baseline weight/BMI, diagnosis codes, prior therapy dates |
| Doesn't meet BMI criteria | Appeal with documentation | A documented qualifying comorbidity, or corrected baseline (not current, post-diet) weight |
| Step therapy required | Step-therapy exception | Dated records of the required trial, or documented intolerance/contraindication |
| Non-preferred / non-formulary | Formulary exception | Prescriber statement that preferred alternatives are ineffective, harmful, or contraindicated |
| Off-label (diabetes drug for weight) | Switch the product | Usually not winnable as filed — the on-label product (Wegovy/Zepbound) is the fix |
| Plan excludes weight-loss drugs | Not an appeal at all | A different covered indication, or a different funding path entirely |
The distinction that saves the most wasted effort is the last row. A benefit exclusion is not a clinical decision — it is what your employer or plan purchased. Appealing it as though it were a medical-necessity dispute usually fails, because there is no medical fact that changes it.
Before you file: the documentation checklist
Most first-round denials are documentation failures, not clinical disagreements. Ask your prescriber's office to confirm each of these is in the chart and submitted:
- Baseline weight and BMI — the starting figure, not today's. This is the single most common gap after someone has already lost weight on their own.
- Diagnosis codes for obesity and every qualifying comorbidity (hypertension, dyslipidemia, sleep apnea, prediabetes, cardiovascular disease).
- Prior therapy history with dates — which drugs, what doses, how long, and why each was stopped. “Tried and failed” without dates is not documentation.
- Documented intolerance, if a required step-therapy drug caused side effects — recorded at the time, not recalled later.
- Lifestyle-intervention records if your plan requires a supervised program.
- Relevant labs — A1c, lipid panel — where they support the indication.
You are also entitled to see the criteria used against you. Request the plan's written clinical criteria and the full denial rationale; on ACA-compliant plans, members can request the documents and criteria relied on in the determination free of charge. It is hard to argue against a standard you have not read.
Step 2: work the appeal ladder
- Peer-to-peer review: ask your prescriber to call the plan's medical reviewer — often the fastest fix.
- Internal appeal: a formal written appeal to your plan, with the documentation and a medical-necessity argument.
- External review: if the internal appeal fails, request an independent external review — a decision your plan must honor.
For a non-preferred drug, run the formulary-exception path in parallel. Not sure of the criteria you needed to meet? See the GLP-1 prior authorization pillar. You can also generate a starting appeal letter with our appeal-letter tool.
The peer-to-peer: what your prescriber should actually say
A peer-to-peer is a short call, and it goes better when the prescriber leads with the criteria rather than the story. The structure that works:
- Name the criterion being disputed. “The denial cites failure to meet the BMI threshold. The baseline BMI on record is X, documented on [date], before treatment.”
- Supply the missing evidence directly. Dates, doses, durations — not adjectives.
- State the qualifying indication precisely. If the patient has established cardiovascular disease, or moderate-to-severe sleep apnea, say which product carries that indication and why it applies here.
- Ask what specifically would change the decision. This converts a “no” into a to-do list, which is the point of the call.
- Get the reviewer's name and the reference number before hanging up.
Ask for the P2P in writing if the plan resists scheduling it, and note the date of every request. A documented pattern of attempts matters at external review.
If you have Medicare Part D: the exact rules
Medicare drug appeals run on their own five-level ladder with deadlines set in federal regulation — which means the numbers below are not plan-by-plan guesswork.
| Level | Decided by | You must file within | They must decide within |
|---|---|---|---|
| 1. Redetermination | Your plan (a different reviewer) | 60 days of receiving the notice | 7 days (benefit) · 14 days (payment) · 72 hours expedited |
| 2. Reconsideration | Independent Review Entity (IRE) | 60 days of receiving the redetermination | Same clock: 7 / 14 days · 72 hours expedited |
| 3. OMHA | ALJ or attorney adjudicator | 60 days | 90 days · 10 days expedited |
| 4. Medicare Appeals Council | HHS Departmental Appeals Board | 60 days | 90 days · 10 days expedited |
| 5. Federal District Court | US District Court | 60 days | — |
Sources: 42 CFR 423.582, 423.590, 423.600 (Levels 1–2) and 42 CFR Part 423 Subpart U (Levels 3–5).
Five Part D details that are widely published wrong
- “You get 65 days.” The regulation gives you 60 days from receipt; the familiar 65 comes from a rebuttable presumption that you received the notice 5 days after its date. If the plan can show earlier receipt, those 5 days vanish. Count 60 days from the date printed on the notice and you are safe under either reading.
- “Redeterminations take 7 days.” True for a coverage (benefit) request. A payment request — you already paid and want reimbursement — gets 14 days. Most consumer pages omit this entirely.
- “If the plan misses its deadline, refile.” No. Missing the timeframe is an adverse decision, and the plan must forward your request to the Independent Review Entity within 24 hours. Your appeal escalates automatically — you do not start over.
- “Your doctor can appeal at every level.” Your prescriber can act on your behalf at Levels 1 and 2. Beyond that, they cannot — unless separately appointed as your representative.
- “There's a minimum dollar amount to appeal.” Not at Levels 1 or 2 — no threshold applies there. A dollar minimum first appears at Level 3, and it is adjusted annually.
One more, for the exception route specifically: if you request a formulary exception and the IRE has not received your prescriber's supporting statement, the IRE may extend its deadline by up to 14 days. The supporting statement is the bottleneck — chase it early. See formulary exceptions.
Step 3: mind the deadlines
Standard internal appeals typically must be answered within a set window (often ~30 days for a pre-service denial), external review within its own window (often ~45 days), and urgent/expedited appeals much faster (often within 72 hours). The exact timelines depend on your plan type and state — but missing a filing deadline can end your appeal, so track every date.
Appeal rights and timelines vary by plan type (commercial, ERISA, Medicare, Medicaid) and state. This is general guidance as of 2026-07-18, not legal or insurance advice — check your plan's documents.