Rejection is not denial
A clearinghouse rejection means the claim never reached the payer — usually a formatting, identifier, or enrollment problem inside your own submission path. A payer denial means the claim was received and adjudicated against plan rules.
Confusing the two sends staff to the wrong place. Rejections are worked inside your EHR and clearinghouse; denials are worked against payer policy and the clinical record.
Categories worth tracking separately
Grouping denials by category shows whether the cause is upstream (scheduling, credentialing, documentation) or in the claim itself.
- Authorization — missing, expired, wrong code, or insufficient units
- Eligibility — coverage inactive or a different plan on the date of service
- Provider identifier — rendering provider, group NPI, taxonomy, or affiliation
- Roster and participation — clinician not active with that plan
- Duplicate — same code, date, and provider already adjudicated
- Bundling and same-day — one service considered included in another
- Documentation and medical necessity — record does not support what was billed
- Timely filing — submitted or corrected past the plan's window
Work the pattern, not the claim
When a category repeats, the fix belongs upstream. Repeated authorization denials usually mean intake is not tracking unit balances. Repeated provider-identifier denials usually mean credentialing and billing are working from different lists.
Every denial resolution should end with a question: what would have prevented this claim from being submitted this way?
Sources and verification
- New Mexico Behavioral Health Policy and Billing Manual — Introduction, version dated 4.1.25
- New Mexico Behavioral Health Service Standards — June 1, 2025
- New Mexico HCA — Program Rules (NM Administrative Code)
- New Mexico HCA — Provider Enrollment (PED)
- Payer remittance advice and denial code definitions — Confirm each code's meaning with the issuing payer before building workflow around it.
Requirements, manuals, and payer policies may change; confirm the current version before relying on any source. Listed sources do not endorse New Mexico Billing.
Information on this website is educational and operational in nature. New Mexico rules, Medicaid manuals, payer policies, authorization requirements, and ASAM guidance may change. This website is not legal, clinical, coding, compliance, or payer-contracting advice.
Last reviewed: September 2026