MAC dismissed a redetermination request: two separate paths

For Original Medicare provider-side billing researchers holding an actual MAC dismissal of a redetermination request. A dismissal concerns the request’s procedural disposition; it is different from an unfavorable merits decision.

Source verification required. Filing windows and procedural guidance are withheld while evidence is changed, stale or unavailable.

Official CMS source — Dismissal of a Redetermination Request — comparison table · checked 2026-10-19. Source does not establish a universal effective date; current guidance checked, not historical reconstruction

Official CMS source — Dismissal of a Redetermination Request — comparison table · checked 2026-10-19. Source does not establish a universal effective date; current guidance checked, not historical reconstruction

Prepare and save a QIC dismissal-review checklist · Prepare and save a MAC vacatur checklist · Initial claim appeal · QIC merits reconsideration · Provider directory