United Healthcare denying claims: what to do when the denial is yours

United Healthcare denied claims: what the federal file shows

UnitedHealthcare's 15 reporting entities denied 7,137,191 of 37,134,878 in-network claims (19.2%) in the plan-year 2026 CMS file. That rate, entity by entity, is on United Healthcare denial rate. This page is about what to do with your own denial.

The reason categories the file records most for UnitedHealthcare: Provider out of network (3,311,785), Other reasons (1,798,006), Service excluded from the plan (1,010,725). The reason printed on your letter is the one that decides your argument.

What people did next, record by record. A blank in the federal file stays a blank here; we never read a missing figure as a zero.

How UnitedHealthcare says an appeal works, in its own words

We quote each line as written and label it member or provider. A provider-side clock is never your clock as a member. Member clocks can differ by plan and by state, and your denial letter is the authority for yours.

• Member process. Member filing window: 180 calendar days. “within 180 calendar days following any incident or action that is the subject of your dissatisfaction” Note: Member-side second source. UnitedHealthcare's provider page publishes no member window; this member form states 180 days. From Member service request form (memberforms.uhc.com, carries state-specific sections incl. California IMR; undated), checked August 26, 2026.
• Member process. Who may appeal (member side): member, authorized representative, or contracted provider. “a timely request by a member, an authorized representative or a contracted provider to change a plan denial decision” From Member service request form (memberforms.uhc.com, carries state-specific sections incl. California IMR; undated), checked August 26, 2026.
• Member process. Member review clocks: acknowledge 5 days, decide 30 days standard / 3 days urgent. “acknowledge receipt within 5 calendar days and provide an answer within 30 calendar days for a standard review. If your problem is urgent, UnitedHealthcare must give you a decision within 3 calendar days.” Note: Stated on a form page that also carries California-specific sections (DMHC 1-888-466-2219, Independent Medical Review), plan-state specifics can vary. From Member service request form (memberforms.uhc.com, carries state-specific sections incl. California IMR; undated), checked August 26, 2026.
• Provider process. Combined window for both steps: 12 months. “You have 12 months to complete the following steps: Step 1: File a claim reconsideration request. Step 2: File an appeal if you disagree with the outcome of the claim reconsideration decision.” Note: One clock covers both steps, a slow reconsideration eats the appeal window. From Pre- and post-service appeals and reconsiderations, checked August 25, 2026.
• Provider process. Two-step structure is mandatory: reconsideration, then appeal. “you must submit a claim reconsideration request. If you don't agree with the outcome of the reconsideration, you may submit an appeal” From Pre- and post-service appeals and reconsiderations, checked August 25, 2026.
• Provider process. Assignment of benefits is not representation: separate patient consent needed. “an assignment of benefits does not constitute designation of an authorized representative” Note: For patients: your provider billing UnitedHealthcare for you does NOT automatically let them appeal AS you, a separate authorization is needed, or you appeal yourself. From Pre- and post-service appeals and reconsiderations, checked August 25, 2026.
• Provider process. Submission is portal/API: UnitedHealthcare Provider Portal or API. “You can use either the UnitedHealthcare Provider Portal or an API … to submit a post-service appeal.” Note: No mailing address or fax is published on this page. From Pre- and post-service appeals and reconsiderations, checked August 25, 2026.
• Provider process. Expedited appeal is pre-service only: not available after the service. “If you have already provided the service, an expedited or urgent appeal is not available.” From Pre- and post-service appeals and reconsiderations, checked August 25, 2026.
• Provider process. Peer-to-peer review windows: 3 business days inpatient / 21 calendar days outpatient. “Inpatient cases must be submitted within 3 business days and outpatient cases within 21 calendar days from posted denial.” From Pre- and post-service appeals and reconsiderations, checked August 25, 2026.

Sources: UnitedHealthcare, Pre- and post-service appeals and reconsiderations, on www.uhcprovider.com, written for health care providers, checked August 25, 2026. UnitedHealthcare, Member service request form (memberforms.uhc.com, carries state-specific sections incl. California IMR; undated), on memberforms.uhc.com, written for members, checked August 26, 2026.

Your two dates, and what each one opens

Ask for the claim file in the same letter. You may have it free of charge under 29 CFR 2560.503-1(h)(2)(iii), and it shows you what UnitedHealthcare relied on.

If UnitedHealthcare runs your Medicare Advantage plan

The dates above are for plans through a job or the Marketplace. A Medicare Advantage plan has its own first step: a plan reconsideration, asked for within 65 days from the date on the plan's notice, according to Medicare.gov. The whole route is on appeal a Medicare denial.

When the free stages are used up

The time limit to sue is not one federal number. On a plan through a job, it is often written into the plan itself. The statute of limitations on insurance claims sets out all three clocks, and what an attorney adds at each stage covers the rest.

Questions

Everything you need for your United Healthcare appeal: your two deadlines, the argument that fits your denial reason, the letters, the clinician brief, and the external review request. One payment. No subscription. No cut of your claim. Opens on screen the moment you pay. 14-day refund, no questions, one email to hello@getaxionlabs.com.