UnitedHealthcare of Mississippi denied your claim. Here is your deadline.
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UnitedHealthcare of Mississippi, Inc. denied 93,567 of 431,692 in-network claims in Mississippi; every one of those denials had these same two dates on it. Across Mississippi as a whole the insurers in this file denied 11.2% of in-network claims, 1,141,675 of them, and 1,357 were appealed.
Or let the $29 Appeal Kit date each step and write the claim-file and external-review requests.
UnitedHealthcare of Mississippi, Inc. denied 21.7% of in-network claims in Mississippi, 93,567 claims out of 431,692.
Further down this page, after the free steps: the paid next step.
United keeps denying my claims. I'm up to my ears in medical debt and I make close to nothing.
Those 93,567 denials are 8.2% of every in-network denial recorded in Mississippi in this release, which makes UnitedHealthcare of Mississippi, Inc. the 2nd largest source of denials of the 2 insurers reporting there. Spread across its 15 plans in the state that is about 6,238 denials per plan. 124 internal appeals were filed against those 93,567 denials. Every one of those denials carried the same two dates the tool at the top of this page works out.
Two dates matter more than anything else on this page, and they run the same in Mississippi as everywhere else. You have 180 days from the date on your denial notice to file the internal appeal, and then 4 months from the final internal denial to ask for an independent external review. If waiting would seriously jeopardize your health you can ask for both to be expedited, decided in about 72 hours. Both timeframes are federal, not your insurer's choice, 29 CFR 2560.503-1 (PDF) and 45 CFR 147.136 (PDF), in plain English at HealthCare.gov, and your own denial letter states the ones that govern your plan. The PDFs are the same sections on govinfo.gov, which serves them without a challenge page, so an automated reader can check these two dates as easily as you can.
You are not alone, and here is the measured version of that sentence: 93,567 in-network claims were denied by UnitedHealthcare of Mississippi, Inc. in Mississippi in a single plan year. A denial rate is a fact about an insurer's book of business. It is not a judgment about you, and it is not the last word on your claim.
- Of the 2 insurers reporting a denial rate in Mississippi, UnitedHealthcare of Mississippi, Inc. is the first highest at 21.7%. The highest in the state is 21.7% and the lowest is 10.7%.
- That is 6 percentage points above the 15.7% national average across this dataset, and 10.5 points above the Mississippi average of 11.2%.
- Behind the percentage: 431,692 in-network claims were processed under 15 plans in Mississippi, and 93,567 of them came back denied.
- For every 10,000 claims UnitedHealthcare of Mississippi, Inc. denied, about 13 came back as an internal appeal. The other 9,987 stopped at the letter.
- Of the internal appeals it did receive, UnitedHealthcare of Mississippi, Inc. overturned 37.1%, 46 claims that started life as a no.
- Not one of those denials reached independent external review, the stage whose decision the plan is required by law to accept, and where nationally 22.2% (1,092 of 4,918; interval 22.2-23.8% for counts CMS withheld; 32.6% without SelectHealth) are overturned.
- Its most-recorded denial reason is other reasons at 34.3% of its categorized denials, against 32.4% nationally, a heavier share than the country as a whole. That is the denial mix, not an outcome rate.
- UnitedHealthcare of Mississippi, Inc. accounts for 8.2% of every in-network claim denied in Mississippi in this file.
- By raw volume it is the 86th largest source of denials among the 135 insurer-state records in the file that report one.
- After that, its second-most-recorded reason is provider out of network, 37,335 claims, 25.4% of its categorized denials.
- Third on its own list is member not covered, 20,284 claims, 13.8% of what UnitedHealthcare of Mississippi, Inc. categorized in Mississippi. Between them the top three account for 73.5% of its categorized denials.
- Where UnitedHealthcare of Mississippi, Inc. differs most from the national mix is provider out of network: 25.4% of its categorized denials in Mississippi against 9% across the file.
- Read the other way round: 338,125 of those 431,692 in-network claims were paid, 78.3% of everything UnitedHealthcare of Mississippi, Inc. processed in Mississippi.
- Spread across the 15 plans it reports in Mississippi, that is about 6,238 denied claims per plan, on about 28,779 claims processed per plan.
- Its reason columns add up to 147,116 categorized rows against 93,567 denials, 157.2% of them, and every reason share on this page is a share of that first figure rather than of the second.
- Its smallest recorded category in Mississippi is benefit limit reached, 45 claims, 0% of what UnitedHealthcare of Mississippi, Inc. categorized there.
- Against the file as a whole, this one record is 0.1% of the 83,907,852 in-network claim denials reported by every issuer in it.
- Find the reason code on your denial letter. The reason UnitedHealthcare of Mississippi, Inc. records most often in Mississippi is other reasons, but yours may be one of the other 8, copy the exact wording and code off your own letter tonight, because that sentence is what your appeal has to answer.
- Ask UnitedHealthcare of Mississippi, Inc. in Mississippi for the clinical criteria they judged you against. Under 29 CFR 2560.503-1 they have to hand you the claim file and the policy they applied, free, on request, and you cannot argue with a checklist you have never read.
- Put both deadlines on your calendar before you go to bed. 180 days from the date on the letter for the internal appeal, 4 months from the final internal denial for external review. The free calculator on this page turns your date into the two calendar dates in about ten seconds. UnitedHealthcare of Mississippi, Inc. overturned 37.1% of the internal appeals it did receive, 46 claims, so the stage you are about to start is not decorative.
None of those three steps costs anything. Anyone charging you to do them is selling you something you can do yourself in twenty minutes.
How that compares
| Denial rate | Rate | Difference |
|---|---|---|
| UnitedHealthcare of Mississippi, Inc. | 21.7% | , |
| Mississippi average | 11.2% | +10.5 pts |
| National average (this dataset) | 15.7% | +6 pts |
UnitedHealthcare of Mississippi, Inc. denies 6 percentage points more of its in-network claims than the national average across this dataset. A denial rate is a property of the insurer's book of business, coding practice, plan design, the population it covers, not evidence about the merits of any one claim, including yours.
What happened to appeals
| Stage | Filed | Overturned |
|---|---|---|
| Internal appeal (to UnitedHealthcare of Mississippi, Inc.) | 124 | 37.1% |
| External review (independent) | 0 | not reported |
The gap nobody escalated
93,567 claims denied. 124 internal appeals filed. None reached independent external review. Nationally 22.2% (1,092 of 4,918; interval 22.2-23.8% for counts CMS withheld; 32.6% without SelectHealth) of external reviews are overturned and the decision binds the plan.
That is arithmetic from the reported figures, not a prediction: nobody can say what those specific denials would have done at review, because they never got there. What the numbers do establish is that the binding stage was almost entirely unused here.
What that record means for your own UnitedHealthcare of Mississippi, Inc. letter, and by when. UnitedHealthcare of Mississippi, Inc. overturned 37.1% of the 124 internal appeals its Mississippi members filed against 93,567 denials, and not one of those Mississippi denials went on to the independent stage whose decision binds the plan, UnitedHealthcare of Mississippi, Inc.'s own rows in the plan-year 2027 release of the CMS Transparency in Coverage file, read November 4, 2026 (data.healthcare.gov). Whichever way that lands, nobody files the appeal for you, and the filing runs on a clock set by which plan you hold: an employer or Marketplace plan gives you at least 180 days from the denial notice to file the internal appeal (29 CFR 2560.503-1(h)(3)(i), carried onto individual-market coverage by 45 CFR 147.136(b)(3)(i)), while Medicare Advantage gives you 65 calendar days from the date of its notice (CMS, 42 CFR 422.582(b)) and Medicaid managed care 60 calendar days from the date on the notice (42 CFR 438.402(c)(2)(ii)), both stages free, and the three steps above are the whole of what to do tonight, so take the date printed on your UnitedHealthcare of Mississippi, Inc. notice and file well inside whichever of those windows is yours. The free steps are above; the $29 kit is the same clock with the letters pre-filled for UnitedHealthcare of Mississippi, Inc. in Mississippi. One payment. No subscription. No cut of your claim.
UnitedHealthcare of Mississippi, Inc. inside Mississippi
Your denial did not happen in a national average. It happened in a state market, alongside 2 other insurers reporting into the same federal file, and these are that market's own figures.
- Across the whole of Mississippi, the 3 insurers reporting in this file processed 10,238,831 in-network claims and denied 1,141,675 of them, a state denial rate of 11.2%. UnitedHealthcare of Mississippi, Inc. is one of those 3.
- That puts Mississippi 25th of 29 states by denial rate, 4.5 points below the 15.7% national average, before you get to what UnitedHealthcare of Mississippi, Inc. did inside it.
- Mississippi recorded 1,357 internal appeals against those denials: one appeal for every 841 claims the state's insurers refused. UnitedHealthcare of Mississippi, Inc.'s own ratio is one for every 755.
- Not one denial in Mississippi reached independent external review in the reported year, not UnitedHealthcare of Mississippi, Inc.'s and not any other insurer's in the state. That is the stage whose decision the plan is required by law to accept.
- The reason Mississippi's insurers record most often is other reasons, 217,893 claims, 18.9% of the state's categorized denials. UnitedHealthcare of Mississippi, Inc. records the same one most often, so your letter is likely to say it too.
- The other insurers a Mississippi reader could have bought from run from 10.7% (Ambetter of Magnolia Inc.) to 10.7% (Ambetter of Magnolia Inc.). UnitedHealthcare of Mississippi, Inc. at 21.7% sits above all of them.
- Put the two together and UnitedHealthcare of Mississippi, Inc. is responsible for 8.2% of every in-network claim denied in Mississippi in this release, from 4.2% of the claims the state's insurers processed.
- Every Mississippi figure in this section is that state's own row in the same federal file UnitedHealthcare of Mississippi, Inc.'s numbers above come from, CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain, and the full Mississippi page is free at /states/mississippi.
What UnitedHealthcare of Mississippi, Inc. denies most
The most common denial reason recorded for UnitedHealthcare of Mississippi, Inc. plans in Mississippi is other reasons. How that denial is beaten →
| Denial reason | Claims | Share | National share |
|---|---|---|---|
| Other reasons | 50,518 | 34.3% | 32.4% |
| Provider out of network | 37,335 | 25.4% | 9% |
| Member not covered | 20,284 | 13.8% | 7.9% |
| Administrative reason | 14,108 | 9.6% | 17.2% |
| Referral required | 12,563 | 8.5% | 9.6% |
| Service excluded from the plan | 12,263 | 8.3% | 13.4% |
| Benefit limit reached | 45 | 0% | 4.9% |
The last column is each reason's share of all categorized denials nationally, so you can see where UnitedHealthcare of Mississippi, Inc.'s mix in Mississippi differs from everyone else's. This is denial mix, not overturn rate by reason, the federal file does not report appeal outcomes broken down by denial reason, and we do not imply otherwise.
Put the date from your notice in and get the two calendar dates, with the days remaining.
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Or let the $29 Appeal Kit date each step and write the claim-file and external-review requests.
The three steps at the top of this page are the whole of what you have to do tonight. The longer version, what the internal appeal has to contain, how the independent stage works, and how to ask for expedited handling when waiting would seriously jeopardize your health, is published free here. For what it is worth on this page specifically: UnitedHealthcare of Mississippi, Inc. overturned 37.1% of the internal appeals it received.
Who appeals what at UnitedHealthcare
UnitedHealthcare runs a mandatory TWO-STEP provider process, a claim reconsideration first, an appeal only after, and is strict about who counts as the member's representative. The first row is the member's route; the others are the provider's. From UnitedHealthcare's published pages, written for health care providers and members; each is listed below with its date. It is brand-level and applies to UnitedHealthcare of Mississippi, Inc. in Mississippi the same as to every other UnitedHealthcare entity in the file.
| Dispute | Route |
|---|---|
| A plan denial you want changed (member) | Member, authorized representative or contracted provider. The member form says a timely request; federal rules generally give at least 180 days |
| Post-service claim dispute (provider) | Reconsideration first, then appeal, both steps inside 12 months |
| Pre-service denial | Appeal 'made prior to a planned health care service'; expedited available if delay could seriously jeopardize the member |
| Provider appealing on the member's behalf | Requires authorization/patient consent, an assignment of benefits is NOT enough |
Operational facts from the same policy
- Combined window for both steps: 12 months , One clock covers both steps — a slow reconsideration eats the appeal window.
- Two-step structure is mandatory: reconsideration, then appeal
- Assignment of benefits is not representation: separate patient consent needed , 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.
- Submission is portal/API: UnitedHealthcare Provider Portal or API , No mailing address or fax is published on this page.
- Expedited appeal is pre-service only: not available after the service
- Peer-to-peer review windows: 3 business days inpatient / 21 calendar days outpatient
- Member grievance window (California section of the form): 180 calendar days , Member-side second source. This wording sits under the form's California grievance instructions, so it is not a national appeal deadline. UnitedHealthcare's provider page publishes no member window.
- Who may appeal (member side): member, authorized representative, or contracted provider
- Member review clocks: acknowledge 5 days, decide 30 days standard / 3 days urgent , Stated on a form page that also carries California-specific sections (DMHC 1-888-466-2219, Independent Medical Review) — plan-state specifics can vary.
Sources: UnitedHealthcare, "Pre- and post-service appeals and reconsiderations", quoted, not paraphrased; audience: health care providers; checked 2026-11-05. UnitedHealthcare, "Member service request form (memberforms.uhc.com — carries state-specific sections incl. California IMR; undated)", quoted, not paraphrased; audience: members; checked 2026-11-05. Brand-level policy, applied here because UnitedHealthcare of Mississippi, Inc. is a UnitedHealthcare entity. Your own denial letter and plan documents govern your specific case.
Questions
Is UnitedHealthcare of Mississippi, Inc.'s denial rate in Mississippi high?
21.7% against a national average of 15.7% across the plans in this dataset. It is above average. A denial rate describes the insurer, not the merits of your claim.
How many people appealed a UnitedHealthcare of Mississippi, Inc. denial in Mississippi, and how many won?
124 internal appeals were filed against 93,567 denials, and 37.1% of them were overturned (46 claims). Not one went on to independent external review, the stage whose decision is binding on the plan.
How does UnitedHealthcare of Mississippi, Inc. compare with other insurers in Mississippi?
Of the 2 insurers in Mississippi with a reported denial rate, UnitedHealthcare of Mississippi, Inc. ranks 1 highest at 21.7%. The highest in Mississippi is UnitedHealthcare of Mississippi, Inc. at 21.7%; the lowest is Ambetter of Magnolia Inc. at 10.7%.
What does UnitedHealthcare of Mississippi, Inc. deny most often in Mississippi?
Other reasons, 50,518 claims, 34.3% of this issuer's categorized denials, against 32.4% nationally. This is the denial-reason mix; the federal file does not report overturn rates by reason.
How long do I have to appeal a UnitedHealthcare of Mississippi, Inc. denial in Mississippi?
Generally 180 days from the date on the denial notice to file the internal appeal, then generally four months from the final internal denial to request independent external review. Expedited review, decided in about 72 hours, is available where delay would seriously jeopardize your health. Those timeframes are federal, so they are identical for every insurer reporting in Mississippi, UnitedHealthcare of Mississippi, Inc. included, what varies by state is who runs the independent review at the end. Your own denial letter states the deadlines that govern your plan; that letter is the authority.
Does appealing a UnitedHealthcare of Mississippi, Inc. denial in Mississippi cost anything?
The internal appeal to UnitedHealthcare of Mississippi, Inc. is free. External review is free under the HHS-administered federal process; where an issuer uses a contracted independent review organization or a state process, any fee is capped at $25 per review. Nobody in Mississippi can be charged more than that to file one.
Can UnitedHealthcare of Mississippi, Inc. ignore an external review decision in Mississippi?
No, and that is the whole point of the stage. External review decisions are binding on the plan by law, which is what makes the zero external reviews recorded against 93,567 UnitedHealthcare of Mississippi, Inc. denials in Mississippi the striking number on this page.
The line on this page we would read twice is the one that says not one of UnitedHealthcare of Mississippi, Inc.'s 93,567 denials in Mississippi reached independent review. We are not going to tell you that you will win. This page prints the insurer's own reported numbers whichever way they fall. If what it says does not match the letter in your hand, write to us and we will correct the page.
Axion Labs · hello@getaxionlabs.comEverything you need for your UnitedHealthcare of Mississippi, Inc. appeal in Mississippi: your two deadlines, the argument that fits your denial reason, the letters, a brief for your doctor on what the reviewer checks, 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.
The UnitedHealthcare of Mississippi, Inc. figures on this page, the 21.7% denial rate, the 93,567 denials and the 0 external reviews, are this issuer’s own reported rows in that file.
Counts: CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain. Rights and timeframes: 29 CFR 2560.503-1 (180 days, and your free right to the claim file) and 45 CFR 147.136 (4 months, and what qualifies), explained at HealthCare.gov. Expedited review is decided in about 72 hours under both sections.
Reading either regulation from a script rather than a browser: eCFR answers automated fetches with a challenge page, so the same two sections are mirrored as government PDFs at govinfo.gov (29 CFR 2560.503-1) and govinfo.gov (45 CFR 147.136).