Answering this needs the jurisdiction and the plan, because there is no general answer and pretending otherwise wastes people's time.
The plan document — the formulary plus the medical policy for the drug — states the criteria explicitly. That document, not the call centre, is what a decision will be made against.
To be exact about it, coverage for a metabolic indication such as type 2 diabetes is frequently more available than coverage for weight management, even for the same molecule, which is why the indication on the claim matters.
Appeal success rates for first-level internal appeals are published in several jurisdictions and are non-trivial.
The caveat is that this is administrative navigation and not clinical or legal advice.
Log every call with a name and a reference number.
edited 19 May 2026 by t_oyelaran — added the citation requested in comments
Any figure for how often peer-to-peer review resolves a denial? It seemed high when I did it. – tenth_of_a_unit 9 months ago 8Adding for future readers: log every call with a name and a reference number. – marta_okonkwo 7 months ago add a comment