What is external review?
External review is an independent review of certain final denials. Under 13.10.17.19 NMAC, the Office of Superintendent of Insurance (OSI) appoints a certified independent review organization (IRO) at no cost to you for eligible medical disputes.
The IRO is not affiliated with your insurance company. The carrier pays the IRO's fees (13.10.17.19 NMAC).
General overview: Appeals roadmap. Complete New Mexico internal appeals first unless an urgent exception applies.
Who can use New Mexico review?
External review generally applies when:
- You have a fully insured New Mexico health plan regulated by OSI
- The dispute involves medical necessity, appropriateness, health care setting, level of care, effectiveness, or experimental/investigational treatment
- OSI accepts your request after you exhaust required internal review (with exceptions below)
Usually does not apply to:
- Self-funded ERISA employer plans (federal external review may still apply)
- Medicaid and Medicare (separate fair hearing or Medicare appeal paths)
- Pure benefit-exclusion disputes with no medical judgment component (some rescission and administrative denials may still qualify—read your notice)
Deadlines & exhaustion
Four-month filing window
Your denial notice should explain that you may request external review within four months of the final internal adverse determination (13.10.17.15 NMAC). Many consumer guides describe this as about 120 days—follow the deadline in your letter.
Exhaust internal appeal first
Complete the carrier's internal grievance process before external review in most cases. Exceptions include:
- Carrier waives internal review (13.10.17.19 NMAC)
- Carrier fails to comply with internal review requirements—process may be deemed exhausted ( 13.10.17.19 NMAC)
- Expedited external review may run at the same time as expedited internal review when urgent ( 13.10.17.19 NMAC; 13.10.17.15 NMAC)
State employee plans: additional review board steps may be required before OSI IRO review (13.10.17.18 NMAC).
How to file
- Complete internal appeal and obtain a final denial when required.
- Gather the denial letter, appeal correspondence, policy, and medical records.
- Submit a written external review request to OSI's Managed Health Care Bureau using OSI forms and instructions on osi.state.nm.us.
- For expedited review, include physician certification that standard time frames would jeopardize life, health, or maximum function.
Common submission methods (confirm current instructions on OSI's site):
- Email: mhcb.grievance@osi.nm.gov (subject line: external review request)
- Fax: 505-827-6341 or 505-827-4253 (verify on your denial notice)
- Mail: Superintendent of Insurance, Attn: Managed Health Care Bureau — External Review Request, P.O. Box 1689, Santa Fe, NM 87504-1689
Links hub: New Mexico external appeals links.
How long it takes
- Standard review: IRO decision often within 45 days after OSI receives a complete request (consumer guides; confirm with OSI)
- Expedited review: often within 72 hours when urgent
Is the decision binding?
For eligible medical disputes, the IRO decision is binding on the health carrierunder New Mexico's managed health care grievance rules and the Health Care Quality Act framework. If the IRO reverses the denial, the carrier must provide coverage consistent with the decision.
The IRO is not bound by the carrier's earlier utilization review or internal appeal conclusions (13.10.17.19 NMAC).
Medicaid & Medicare
Centennial Care (Medicaid): MCO appeal, then HCA Office of Fair Hearings—not commercial OSI/IRO review under 13.10.17.19 NMAC.
Medicare & Medicare Advantage: Federal Medicare appeals through CMS.
More: Medicaid managed care · Medicare appeals.