N674N-series (general use)Coverage & Eligibility
N674: Missing prerequisite service
Coverage requires a prerequisite procedure or service that isn't on file — step-therapy and staged-care logic (e.g., conservative treatment before surgery).
Commonly appears with these denial codes
The denial code gives the category; N674 pinpoints the specific problem. Read them together before touching the claim.
What to do about it
Document the prerequisite care (or perform it) and appeal/rebill with records showing the required sequence was met.
OakClaim fixes root causes, not just claims.
Free billing audit shows which remark codes keep recurring in your AR — and what they're costing you.