Reviewed by Hassan Raza Awan, Founder — 4+ years of hands-on U.S. medical billing experience. General billing information — verify against current CMS guidance and your payer contracts.
Billing the largest U.S. insurer means billing a family of sub-brands, each with its own rules. Here is the working reference — filing windows, the two-step dispute process, and the denial patterns UHC is known for.
| Item | Typical rule |
|---|---|
| Timely filing (participating) | 90 days from date of service is the common contract standard; some contracts and plans allow 180 days — check yours |
| Claim reconsideration | Generally within 12 months of the original determination |
| Formal appeal | Typically 12 months from determination (after reconsideration where required) |
| Provider portal | UHCprovider.com — eligibility, claims, reconsiderations, and policy library in one login |
| Provider services phone | 877-842-3210 (general provider line; plan-specific numbers appear on the member ID card) |
| Common payer ID | 87726 for many commercial plans — but sub-brands use their own; always confirm against the member card and your clearinghouse list |
UnitedHealthcare covers several distinct products — Oxford, UMR and Surest all sit under the UHC umbrella but carry their own plan documents, and the windows are not always the same. The windows below are the ones most commonly published in provider manuals — treat them as a starting point, not a substitute for your executed contract, which overrides everything here. TFL is the abbreviation you will see in most payer documentation.
| Claim type | Product | Typical window |
|---|---|---|
| Initial claim | Commercial | 90–180 days from date of service |
| Initial claim | Medicare Advantage | 12 months from date of service |
| Corrected claim | All | 12 months typical |
| Appeal | Commercial | 12 months typical |
| Appeal | Medicare Advantage | 60 days from the remit |
The clock people miss: the corrected-claim and appeal windows are separate from the initial filing window, and they are usually shorter. At most payers they run from the date of the remit, not the date of service — so a claim filed on day 5 and denied on day 80 has not reset anything. This is the most common way a claim filed on time still ends up written off.
Once you know your window, our timely filing calculator turns it into the actual deadline date and days remaining. For every other payer side by side, see the timely filing limits by payer table. If a claim has already denied for late filing, CO-29 is the code you will see.
"UnitedHealthcare" on the front of a card can mean commercial employer plans, individual exchange plans, Medicare Advantage (including dual special-needs plans), state Community Plans (Medicaid), or care routed through sub-brands like UMR (self-funded administration), Oxford (Northeast plans), Surest, or Student Resources. Each can carry different payer IDs, filing windows, and appeal addresses. The classic UHC billing failure is sending a UMR claim to the standard UHC payer ID — it either rejects or vanishes into the wrong queue, and the clock keeps running toward your filing deadline.
For participating providers, UHC contracts commonly set 90 days from the date of service — one of the tighter windows among national payers (Aetna commercial often runs 120 days, many BCBS plans 180). Some UHC plans and contracts allow 180 days, and Medicare Advantage products generally follow the 12-month Medicare standard. Two practical rules: submit within 30 days as a matter of policy and the deadline never matters; and when a claim does deny for late filing (CO-29), your clearinghouse acceptance report is the proof-of-timely-submission evidence that wins the appeal. Run your specific dates through our timely filing calculator.
If you are a UHC member fighting a denied claim or a confusing bill: start with the EOB in your member portal (myuhc.com) — our EOB guide decodes it. You generally have 180 days to appeal a denial as a member, using the appeal instructions printed on the EOB; the member services number on your ID card is the fastest route to a live reviewer. If the bill is a surprise out-of-network charge from an emergency or an in-network facility visit, read our No Surprises Act guide before paying — and if the provider billed you more than the EOB says you owe, our dispute guide walks you through it step by step.
UnitedHealthcare is not one rulebook. Oxford, UMR, Surest and UHC Student Resources all sit under the UHC umbrella but carry their own plan documents, and their filing and appeal windows are not always the same as the commercial default. The member ID card is the fastest way to identify which set of rules applies before you file anything.
| Product | What it is | Where the rules live |
|---|---|---|
| UnitedHealthcare commercial | Standard fully-insured and ASO plans | UHC provider manual |
| Oxford | Regional plans, largely north-east US | Oxford-specific plan documents |
| UMR | Third-party administrator for self-funded employers | Employer plan document, not the UHC manual |
| Surest | Fixed-copay product, no deductible | Surest-specific documents |
| UHC Student Resources | Student health plans | Plan-specific, often shorter windows |
UMR is the one that catches people out. UMR administers self-funded employer plans, so the governing document is the employer's plan, not a UHC-wide policy. Two UMR claims for two different employers can carry genuinely different filing and appeal windows. Never assume a UMR deadline from a previous UMR claim.
| Level | Product | Typical window |
|---|---|---|
| First-level appeal | Commercial | 12 months typical |
| Appeal | Medicare Advantage | 60 days from the remit |
| Appeal | Oxford / UMR / Surest / Student Resources | Plan-specific — check the plan document |
| Corrected claim (not an appeal) | All | 12 months typical |
Each UnitedHealthcare product carries its own plan documents, and the filing window is not inherited from the commercial default. The member ID card identifies which product you are dealing with before you file anything — the logo, the plan name and the payer ID on the back are the fastest tell.
Oxford operates as a regional UnitedHealthcare product, concentrated in the north-eastern United States, and maintains its own provider manual separate from the national UHC manual. Filing windows commonly land in the 90 to 180 day range from the date of service, with appeals typically following the plan-specific window rather than the UHC commercial default. Because Oxford plans are sold in several states, the same product name can carry different terms depending on where the member's plan was issued — check the manual for the state on the card, not the state you practise in.
UMR is a third-party administrator, not an insurer. It administers self-funded employer plans, which means the governing document is the employer's plan document rather than any UnitedHealthcare policy. This is the single most important distinction in the UHC family, and it produces a result that surprises people: two UMR claims for two different employers can carry genuinely different filing windows, different appeal windows and different medical policies.
Practically, that means a UMR deadline you learned on one account tells you nothing about the next. Verify per employer group, and note the group number alongside the payer ID when you record the window. Windows commonly fall in the 90 to 180 day range, but the range is the plan's to set.
Surest is UnitedHealthcare's fixed-copay product — members see a set price per service with no deductible and no coinsurance, which changes the patient-responsibility side of your workflow more than the filing side. Filing and appeal windows follow Surest's own plan documents. The practical difference at the front desk is that patient cost-share is knowable in advance rather than estimated, so collection at time of service is more straightforward than with a deductible plan.
Student health plans are administered separately and frequently carry shorter windows than commercial plans, which is what makes them a recurring source of late-filing write-offs at university-adjacent practices. Academic-year enrolment also means eligibility can lapse between terms, so verify coverage on the date of service rather than relying on a check from the previous semester.
eviCore is a utilisation-management vendor used by several plans, including some UnitedHealthcare products, for prior authorisation on imaging, cardiology, oncology and other high-cost service lines. It does not pay claims, but an authorisation denial from eviCore produces a claim denial from the plan. Authorisation-based denials generally have to be appealed through the UM vendor first — sending the appeal only to the plan wastes the window. The denial letter names the reviewing entity; read it before choosing where to send the appeal.
The habit that prevents most of these write-offs: record the product name and group number in your practice management system alongside the payer, not just "UnitedHealthcare". A single payer entry covering five products with different windows is how a claim gets filed against the wrong deadline — and nothing in the remit will tell you that is what happened.
Once you know the applicable window, our timely filing and appeal deadline calculator converts it into the actual date with days remaining, and the timely filing limits by payer table covers every other major payer side by side.
Related: Timely Filing Calculator · CO-29 — late filing · CO-22 — coordination of benefits · Appeal Letter Generator · All payer guides
Reviewed by Hassan Raza Awan, Founder — 4+ years of hands-on U.S. medical billing experience. General billing information — verify against current CMS guidance and your payer contracts.
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