Most denials are caused before the claim leaves the building: an eligibility gap at intake, a missing modifier, an authorization that quietly expired. Payers just deliver the bad news.

The five upstream fixes that raise first-pass acceptance: verify every visit electronically, track auths against every case, scrub claims before submission, post ERAs automatically, and work denials within days — not weeks. Practices that do all five run above 98% first-pass acceptance.