Why did UnitedHealthcare deny my claim as "not medically necessary"?

The insurer agrees the service exists in your plan but says your specific case does not meet their clinical criteria. At UnitedHealthcare the most common triggers are: The submitted chart did not include the ICD-10 codes or severity markers listed in the cited UHC policy.; Prior conservative therapy was documented in the physician's mind but not written in the note.; Imaging or lab thresholds in the UHC CDG were not quantified in the record..

How do I appeal a UnitedHealthcare not medically necessary denial?

Pull the exact UHC Medical Policy or CDG cited in the denial letter (or request it in writing under 29 CFR 2560.503-1(h)(2)(iii) — UHC must provide it free of charge). Map each criterion to a line in the chart with a page reference. Add a treating-physician letter of medical necessity that mirrors the policy language and requests a peer-to-peer with a same-specialty UHC medical director.

What is the appeal deadline for UnitedHealthcare?

180 days from the date of the denial notice to file an internal appeal. Expedited appeals are decided in 72 hours.

How often are UnitedHealthcare medical necessity denials overturned?

High likelihood of overturn. Medical-necessity denials at UHC overturn at meaningful rates when the appeal maps the chart to UHC's own policy line by line and a same-specialty peer-to-peer is requested.

What federal law backs my right to appeal a UnitedHealthcare not medically necessary denial?

For employer-sponsored (ERISA) plans, 29 CFR § 2560.503-1 requires a full and fair review by a different reviewer, access to the criteria used, and a written decision. All non-grandfathered commercial plans additionally owe you internal appeal plus independent external review under 45 CFR § 147.136.

UnitedHealthcare denied claim appeal

UHC · updated for 2026 · Verified against UnitedHealthcare (2026-06-16)

To appeal a UnitedHealthcare denied claim you have 180 days from the date of denial to file an internal appeal. Send a written appeal that cites the UHC clinical policy named in the denial letter, includes a letter of medical necessity, and attaches the records that meet each criterion. If urgent, request an expedited review within 72 hours.

Appeal in 4 steps

1Read the UnitedHealthcare denial letter (EOB) and identify the cited medical policy.
2Request the full clinical policy bulletin from UHC; ERISA plans must provide it free of charge.
3Gather office notes, imaging, prior therapy history, and a letter of medical necessity from your treating physician.
4Submit the appeal in writing to the address on the denial letter, by certified mail and through myuhc.com if available, within 180 days.

Key facts

Internal appeal window	180 days from denial
External review window	120 days after final internal denial
Expedited appeal	Decision within 72 hours
Appeals address	Address is plan-specific and printed on the instruction page of the UHC Member Service Request Form (and on your denial letter / EOB).
Phone	Member Services number on the back of your ID card
Member portal	myuhc.com

UHC does not publish a single national appeals mailing address; the correct P.O. Box is on the Member Service Request Form for your plan. ERISA group plans follow the 180-day window under 29 CFR 2560.503-1; marketplace plans follow 45 CFR 147.136.

Primary source: UnitedHealthcare — official appeals pageUHC's Appeal and Grievance Rights page directs members to submit claim appeals to the P.O. Box listed on the instruction page of the Member Service Request Form, within the timeframe set by their plan (180 days for ERISA/ACA plans). Last verified: 2026-06-16.

Draft a UHC appeal letter in minutes

Upload the denial letter. Get the cited policy identified, the evidence checklist, and a finished appeal letter you can sign.

Draft my appeal letter

Common UHC denial reasons

Not medically necessary
Prior authorization not obtained
Out of network provider
Experimental or investigational
Step therapy not completed

Evidence checklist

✓Denial letter (EOB)
✓Member ID and claim number
✓Treating physician letter of medical necessity
✓Office notes from the last 12 months
✓Imaging or lab reports
✓UHC clinical policy bulletin (cited in denial)
✓Prior therapy history
✓Specialty guideline citation

Drug-specific UHC appeals

Verified prior-authorization criteria and override strategy per medication.

UHC appeal by denial reason

Verified policy basis and override strategy for each common reason UHC cites.

FAQ

How long do I have to appeal a UnitedHealthcare denial?+

180 days from the date of the denial to file an internal appeal. Expedited (urgent) appeals must be decided within 72 hours.

Where do I send a UnitedHealthcare appeal?+

Use the address on your denial letter (the EOB). Addresses vary by plan and region; the denial letter is authoritative.

Can I appeal a UnitedHealthcare denial without a lawyer?+

Yes. Most internal appeals are filed by the member or the treating physician. The appeal should cite the insurer's clinical policy and include a letter of medical necessity.

What happens after the internal appeal?+

If the final internal appeal is denied, you have 120 days to request external review by an Independent Review Organization. External review is binding on the insurer.

Other insurers

Keep reading

Appeal process

Common denial reasons

Guides you may need

Not legal or medical advice. This page is a self-help resource. You make your own decisions. Strip personal identifiers (name, date of birth, address, member ID) from any document before uploading or sharing. The information here summarizes commonly-published payer policies and federal rules; confirm against your specific plan document and the current denial letter before acting.