CMS / Medicare / source directory
Appeal does not waive required prior authorization
A claim denial for missing required PA is appealable, but the FAQ states payment cannot be made when no required request was submitted, even if the service otherwise meets coverage. Scope: Program operations only; no individual coverage or medical-necessity determination. Source checked 2026-10-15. Documentary verification only; no clinical review or individual coverage determination.
Source evidence
Documentary checks establish what the official source says, not clinical eligibility.
- opd faq · PDF page 6 — source checked 2026-10-15
Research workspace
Turn source research into a repeatable workflow.
This public reference is available in full above. Paid research tools are not currently available; no clinical checklist or cross-payer authorization determination is included.
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