---
title: "Oscar MS appeal form and deadline"
url: "https://denialfacts.com/insurers/oscar-health-plan-inc--ms"
publisher: "Axion Labs — Denial Facts"
checked: "2026-11-04"
dataset_fixity: "sha256-cda2f9b89c8dde2a74989a35dbe7c0d08ff35dac5456484dc1c03c1b181a67b6"
---

# Oscar denied your claim in Mississippi. Here is your deadline.

Denied by Oscar in Mississippi? Your internal-appeal and external-review deadlines dated from the notice, who decides your case, and a free appeal letter.

## Figures

| Figure | Value |
| --- | --- |
| In-network denial rate | not reported |
| Claims denied | not reported |
| Plans in Mississippi | 9 |
| Internal appeals filed | not reported |
| Internal overturn rate | not reported |
| In-network claims received | not reported |
| External reviews filed | not reported |
| External overturn rate | not reported |
| National denial rate | 15.7% |

## External-review route

**State-run process.** Mississippi runs its own external review process meeting the federal standards, so an independent review there is handled through the state program rather than the federal one. This route is the one for insured plans, Marketplace, individual, and employer plans where an insurance company carries the risk. If your coverage is through a job and the employer pays the claims itself (a self-funded or self-insured plan, which is 63% of covered workers), the state process does not apply to you whatever your state operates, and your external review goes through the federal process instead. Your denial letter names your route; if it does not, ask your plan in writing whether the plan is self-funded.

## Oscar in Mississippi, at the top of the page

Mississippi

Your two dates, free

Date on your denial notice

Who pays your claims?

A job, an insurance company pays the claims

A job, my employer pays the claims itself (self-funded)

A job, I do not know which

Marketplace / individual plan I bought myself

Medicare, Medicaid, TRICARE, VA or IHS

Which state?

The reason your letter gives

I'm not sure, I'll paste the sentence later

Not medically necessary
Provider out of network
Service excluded from the plan
Experimental or investigational
Referral required
Benefit limit reached
Member not covered
Administrative reason
Other reasons

Show my two dates, free

Put in the date on your Oscar Health Plan, Inc. notice and get both federal deadlines as calendar dates.

Free, for an Oscar Health Plan, Inc. denial in Mississippi, and it runs entirely in your browser. The date, the plan type and the state you pick are never sent to us and never stored.

Oscar Health Plan, Inc. reported no usable denial count for Mississippi, so these dates are the part of this page that is certain. 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](/appeal-kit) date each step and write the claim-file and external-review requests.

Oscar Health Plan, Inc. operates 9 plans in Mississippi.

By [Axion Labs](/about) · August 19, 2026, updated November 4, 2026

Further down this page, after the free steps: the paid next step .

Insurance got denied, what to do next?

We hear this most. [r/HealthInsurance, thread title](https://www.reddit.com/r/HealthInsurance/comments/1rdxwvi/insurance_got_denied_what_to_do_next/) , read September 3, 2026.

The number nobody else publishes, and here it is missing. CMS publishes no external-review figure for Oscar Health Plan, Inc. in Mississippi, so nobody, including the regulator, can say whether anyone ever got that far. We print no number rather than reading an absence as a zero. Nationally, 4,918 of 83,907,852 denials reached that stage, one in every 17,061, and 22.2% (1,092 of 4,918; interval 22.2-23.8% for counts CMS withheld; 32.6% without SelectHealth) of those were overturned.

The clock your letter has to describe, in actual dates

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](https://www.ecfr.gov/current/title-29/section-2560.503-1) ( [PDF](https://www.govinfo.gov/content/pkg/CFR-2024-title29-vol9/pdf/CFR-2024-title29-vol9-sec2560-503-1.pdf) ) and [45 CFR 147.136](https://www.ecfr.gov/current/title-45/section-147.136) ( [PDF](https://www.govinfo.gov/content/pkg/CFR-2024-title45-vol2/pdf/CFR-2024-title45-vol2-sec147-136.pdf) ), in plain English at [HealthCare.gov](https://www.healthcare.gov/appeal-insurance-company-decision/internal-appeals/) , 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.

Data verified November 4, 2026 · CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain

You are not alone, and here is the measured version of that sentence, for Mississippi rather than for Oscar Health Plan, Inc., because the file left this company's rows empty: insurers in Mississippi denied 1,141,675 in-network claims in a single plan year, 11.2% of everything submitted, across 3 reporting insurers. How many of those came from Oscar Health Plan, Inc. is not on the record; that it happened to a great many people in Mississippi is.

- In Mississippi, Oscar Health Plan, Inc.'s rate was not reported at all, and the same company files in 9 other states in this file, where the rate is not the same in any of them: 18.7% in Tennessee, 18.4% in Missouri, 18.2% in Michigan, down to 15.3% in Texas. Which state the plan was bought in moves the odds more than the brand on the card does.

What to do tonight

- Find the reason code on your denial letter. The federal file records no denial-reason breakdown for Oscar Health Plan, Inc. in Mississippi, so this page cannot tell you which of the 9 categories yours will be, your letter can, and it has to. Copy the exact wording and the code off it tonight: that sentence is what your appeal has to answer.

- Ask Oscar Health Plan, Inc. in Mississippi for the clinical criteria they judged you against. Under [29 CFR 2560.503-1](https://www.ecfr.gov/current/title-29/section-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. Nationally only 1 in 17,061 denials ever reaches the second stage, and none of the Oscar Health Plan, Inc. denials in Mississippi are in that count either way, the file records no figure for them. The date on your letter is the part that is certain.

None of those three steps costs anything. Anyone charging you to do them is selling you something you can do yourself in twenty minutes.

not reported

In-network denial rate

not reported

Claims denied

9

Plans in Mississippi

not reported

Internal appeals filed

not reported

Internal overturn rate

## What happened to appeals

| Stage | Filed | Overturned |
| --- | --- | --- |
| Internal appeal (to Oscar Health Plan, Inc.) | not reported | not reported |
| External review (independent) | not reported | not reported |

What that record means for your own Oscar Health Plan, Inc. letter, and by when. Oscar Health Plan, Inc. recorded no separately reported denials in Mississippi and no separately reported appeal outcome, so this page cannot tell you how its Mississippi appeals went, the Oscar Health Plan, Inc. rows in the plan-year 2027 release of the CMS Transparency in Coverage file, read November 4, 2026 ( [data.healthcare.gov](https://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)](https://www.govinfo.gov/content/pkg/CFR-2024-title29-vol9/pdf/CFR-2024-title29-vol9-sec2560-503-1.pdf) , carried onto individual-market coverage by [45 CFR 147.136(b)(3)(i)](https://www.govinfo.gov/content/pkg/CFR-2024-title45-vol2/pdf/CFR-2024-title45-vol2-sec147-136.pdf) ), while Medicare Advantage gives you 65 calendar days from the date of its notice ( [CMS](https://www.cms.gov/medicare/appeals-grievances/managed-care/reconsideration-advantage-health-plan-part-c) , [42 CFR 422.582(b)](https://www.ecfr.gov/current/title-42/section-422.582) ) and Medicaid managed care 60 calendar days from the date on the notice ( [42 CFR 438.402(c)(2)(ii)](https://www.ecfr.gov/current/title-42/section-438.402) ), both stages free, and the three steps above are the whole of what to do tonight, so take the date printed on your Oscar Health Plan, Inc. notice and file well inside whichever of those windows is yours. The free steps are above; the [$29 kit](/appeal-kit) is the same clock with the letters pre-filled for Oscar Health Plan, Inc. in Mississippi. One payment. No subscription. No cut of your claim.

## Oscar Health Plan, 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%. Oscar Health Plan, 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 Oscar Health Plan, Inc. did inside it.

- Mississippi recorded 1,357 internal appeals against those denials: one appeal for every 841 claims the state's insurers refused.

- Not one denial in Mississippi reached independent external review in the reported year, not Oscar Health Plan, 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](/denial-reasons/other) , 217,893 claims, 18.9% of the state's categorized denials.

- Every Mississippi figure in this section is that state's own row in the same federal file Oscar Health Plan, Inc.'s numbers above come from, [CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain](https://data.healthcare.gov/) , and the full Mississippi page is free at [/states/mississippi](/states/mississippi) .

## What the file does record for Mississippi

The federal file carries no usable figures for Oscar Health Plan, Inc. in Mississippi, so nothing on this page can tell you how often this company denies or how many of its denials were appealed. What it can tell you is the market that denial happened in: Mississippi's own row, and the 2 other insurers reporting alongside Oscar Health Plan, Inc. there. Every number below is Mississippi's, not Oscar Health Plan, Inc.'s, and it is labelled that way because an absent figure must never be filled in from a neighbor.

- 2 insurers in Mississippi reported a denial rate where Oscar Health Plan, Inc. reported none, from UnitedHealthcare of Mississippi, Inc. at 21.7% down to Ambetter of Magnolia Inc. at 10.7%. [The whole Mississippi table is published free](/states/mississippi) .

- The largest single source of denials in Mississippi in this release was Ambetter of Magnolia Inc., with 1,048,108, [its record is here](/insurers/ambetter-of-magnolia-inc--ms) . Oscar Health Plan, Inc.'s own share of that total is unknown, because its rows are the ones the file left empty.

- 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, 11.2%. None of that total is attributable to Oscar Health Plan, Inc.: an absent row is not a zero row, and we will not add one to make the arithmetic tidy.

- The reason Mississippi's insurers recorded most often is [other reasons](/denial-reasons/other) , 217,893 claims, 18.9% of the state's categorized denials against 32.4% nationally. Whether it is the reason Oscar Health Plan, Inc. recorded most often is not on the record; your own letter names yours.

- Behind it in Mississippi: [service excluded from the plan](/denial-reasons/service-excluded) at 182,275 claims, then [administrative reason](/denial-reasons/administrative) at 181,184. Each of those pages says plainly whether external review reaches that category at all, which is the question a Oscar Health Plan, Inc. letter is going to raise next.

- Mississippi's insurers denied 1,141,675 in-network claims in this release, 11.2% of everything submitted, against 15.7% nationally.

- 1,357 internal appeals were filed in Mississippi against those denials, one for every 841 claims refused.

- Not one Mississippi denial in this release reached independent external review, an explicit zero in the state's own row, against one in 17,061 nationally.

- Your deadlines do not depend on any of it: 180 days from the date on your Oscar Health Plan, Inc. notice for the internal appeal, then four months from the final internal denial for external review, the same in Mississippi as in every other state.

- What does depend on Mississippi is who decides your case at the end, Mississippi runs its own external review process meeting the federal standards, so an insured plan there goes through the state program.

Work out your two deadlines

Put the date from your notice in and get the two calendar dates, with the days remaining.

Date on your denial notice

Which denial is this?

First denial (I have not appealed yet)

Final internal denial (my appeal was refused)

Show my deadlines

Runs entirely in your browser, the date you type is never sent to us and never stored. [Open the full calculator →](/appeal-deadline-calculator)

Or let the [$29 Appeal Kit](/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](/how-to-appeal) .

## Questions

##### Is Oscar Health Plan, Inc.'s denial rate in Mississippi high?

Not separately reported for Oscar Health Plan, Inc. in Mississippi in this release, so this page prints no rate for it. The Mississippi market as a whole denied 11.2% of in-network claims, 1,141,675 of them, against 15.7% nationally, that is the state, not this insurer. A denial rate describes the insurer, not the merits of your claim.

##### How many people appealed an Oscar Health Plan, Inc. denial in Mississippi, and how many won?

Appeal volumes were not separately reported for Oscar Health Plan, Inc. in Mississippi. Across Mississippi as a whole 1,357 internal appeals were filed against 1,141,675 denials, one for every 841 refused, and that is the state figure, not this company's. Nationally, 26.8% of internal appeals and 22.2% of external reviews are overturned.

##### How does Oscar Health Plan, Inc. compare with other insurers in Mississippi?

Oscar Health Plan, Inc.'s denial rate was not separately reported, so it cannot be ranked against the other insurers in Mississippi. The full Mississippi table is published free at /states/mississippi.

##### What does Oscar Health Plan, Inc. deny most often in Mississippi?

No denial-reason breakdown was reported for Oscar Health Plan, Inc. in Mississippi. The reason Mississippi's insurers recorded most often is other reasons, 217,893 claims, and that is the state's mix, not this company's.

##### How long do I have to appeal an Oscar Health Plan, 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, Oscar Health Plan, 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 an Oscar Health Plan, Inc. denial in Mississippi cost anything?

The internal appeal to Oscar Health Plan, 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 Oscar Health Plan, 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. The count is the one this page names as absent for Oscar Health Plan, Inc. in Mississippi, so none is printed for it, an absent figure is not a count of none.

The federal file reports no separate figures for Oscar Health Plan, Inc. in Mississippi, so this page gives you the rights and the dates instead of a number it does not have. 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.com

[Get my Appeal Kit, $29](/appeal-kit)
Everything you need for your Oscar Health Plan, 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.

Where these numbers come from The Oscar Health Plan, Inc. figures on this page, the not reported denials, are this issuer’s own reported rows in that file. CMS did not report an external-review figure for Oscar Health Plan, Inc. in Mississippi in the plan-year 2027 release of the Transparency in Coverage file, which is why no external-review count appears above.

Counts: [CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain](https://data.healthcare.gov/) . Rights and timeframes: [29 CFR 2560.503-1](https://www.ecfr.gov/current/title-29/section-2560.503-1) (180 days, and your free right to the claim file) and [45 CFR 147.136](https://www.ecfr.gov/current/title-45/section-147.136) (4 months, and what qualifies), explained at [HealthCare.gov](https://www.healthcare.gov/appeal-insurance-company-decision/external-review/) . 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)](https://www.govinfo.gov/content/pkg/CFR-2024-title29-vol9/pdf/CFR-2024-title29-vol9-sec2560-503-1.pdf) and [govinfo.gov (45 CFR 147.136)](https://www.govinfo.gov/content/pkg/CFR-2024-title45-vol2/pdf/CFR-2024-title45-vol2-sec147-136.pdf) .

This page presents federal statistics and a general description of appeal rights created by federal law. It is not legal, medical, or insurance advice, and no outcome is guaranteed. Your denial letter and plan documents govern your specific case. Free help is available from your state's Consumer Assistance Program and from the federal Marketplace at HealthCare.gov.

Problem solved: You have both dates for your Oscar Health Plan, Inc. notice, you know that Mississippi runs the external review itself, and you have the letter, free, on this screen, tonight.

## The pages that answer the next question

- [Every insurer reporting in Mississippi](/states/mississippi) , the state's own row, the 3 companies filing there, and the Mississippi insurance department's consumer number, read at source.

- [Oscar Health denial rate](/company/oscar) , Oscar Health Plan, Inc. is the Mississippi one; the brand's national rate is 16.8% across 12,378,781 claims in 15 states, and it is not the same in any two of them.

- [Oscar Health Plan, Inc. in South Carolina](/insurers/oscar-health-plan-inc--sc) , the neighboring record in this file; CMS reported no usable denial count for it.

- [Oscar Health Plan of North Carolina, Inc in North Carolina](/insurers/oscar-health-plan-of-north-carolina-inc--nc) , 12.8% of in-network claims denied, 25,387 of them, the neighboring record in this file.

- [Oscar Insurance Company in Alabama](/insurers/oscar-insurance-company--al) , the neighboring record in this file; CMS reported no usable denial count for it.

- [If your employer pays the claims itself](/self-funded-denial) , then Oscar Health Plan, Inc. is only administering the plan, your state's external review has no power over the denial, and the route is federal. It is the first question our own calculator asks. 3 insurers report in Mississippi; whether your plan is one of theirs at all is what that page settles.

- [If it was refused before the treatment](/prior-authorization-denied) , a prior-authorization refusal from Oscar Health Plan, Inc. runs on the same two federal clocks as a denied claim, and it can be appealed while the treatment is still ahead of you. 1,141,675 in-network claims were denied in Mississippi in this release; a refusal before the treatment is not counted among them and is appealed the same way.

- [Before you pay a lawyer](/before-you-call-a-lawyer) , two free appeals run before anyone bills you by the hour, and Oscar Health Plan, Inc. has to hand you the claim file for nothing under 29 CFR 2560.503-1. Free help in Mississippi starts with the state consumer line printed on that state's page.

- [All 152 insurer-state records](/insurers) , the whole table, ranked, with Oscar Health Plan, Inc. in it and the 3 that file in Mississippi beside it.

Your dates are ready. [Write the letter, free](/appeal-letter)

## The two federal clocks

The clock your letter has to describe, in actual dates Whatever else is on the page, these two dates are the page. 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.

## How rare the second appeal is

You are not alone, measured rather than said: 83,907,852 in-network claims were denied in a single plan year, and only 4,918 of them, one in 17,061, ever reached the independent review stage. Of the ones that did, 22.2% (1,092 of 4,918; interval 22.2-23.8% for counts CMS withheld; 32.6% without SelectHealth) were overturned.

## What is free here, and what the one paid thing costs

Denied a claim? Insurers upheld 165,863 of the 262,982 internal appeals counted in 2024, 63.1% ( KFF ). The win is at independent external review, and the only way to arrive there is to run the internal stage on time, in the right order, with the record intact. That sequence is what the Appeal Kit is. Get my Appeal Kit, $29 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. Get my Appeal Kit, $29 Everything you need for your appeal: 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.

## What we will not pretend

What we will not pretend. We cannot overturn your denial. Only your plan, or an independent reviewer, can do that. We cannot make your plan cover a service it genuinely excludes. We cannot guarantee external review applies to your denial. It covers medical judgment, experimental or investigational determinations, and rescission, a purely administrative denial may not qualify, and we say so on those pages rather than selling you past it. We have no customer testimonials and publish none. Our evidence is the federal dataset and the regulation cites, both of which you can check.

## Every page on this site

Home Start here Insurers By company States Denial reasons Use cases How to appeal Ranked by denial rate The external-review gap Write the letter, free Deadline calculator Self-funded plan? Prior authorization denied Medicare WISeR denial Denial code CO-50 Before you call a lawyer Attorney for a denied claim Your denial letter United Healthcare denying claims Time limits on a claim Appeal a Medicare denial About Editorial policy How we compare Privacy Terms For machines: llms.txt openapi.json changes.json the composed answer this page as markdown

## Which release these figures are

Which release these figures are Every number on this page is the plan-year 2027 Transparency in Coverage file, issued October 22, 2026, covering plan-year 2025 claims. This is the newest plan year CMS has published: there is no Transparency in Coverage file for a plan year after 2027. The dataset list is at data.healthcare.gov . A test in this site’s build fetches that list on every run and fails if CMS publishes a plan year we have not acknowledged here. Every earlier release, plan-year 2024, plan-year 2025, plan-year 2026, is kept alongside it so the record is visible rather than a single year’s snapshot; /about says what changed between them. From the plan-year 2024 release to the plan-year 2026 release, external reviews filed went from 2,336 to 5,881. Overturned reviews went from 32.8% in the plan-year 2026 release to 22.2% in plan-year 2027, or from 32.6% to 32.6% without SelectHealth. We do not compare filed or overturned counts across plan-years 2026 and 2027. Some issuers may have counted pre-service appeals in their 2026 cells.

## Where these numbers come from

Where these numbers come from 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) .

## Who publishes this

Denial Facts publishes federal data about health insurance claim denials. We are independent: not affiliated with, endorsed by, or acting for any insurer, government agency, or review organization. We are not a law firm, a medical provider, or an insurance producer, and nothing here is legal, medical, or insurance advice. Data: CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain. Figures cover individual-market Qualified Health Plans on the federal Exchange and come from the plan-year 2027 release, issued October 22, 2026, covering plan-year 2025 claims. This is the newest plan year CMS has published: there is no Transparency in Coverage file for a plan year after 2027. See where the data comes from .

## Sources

- CMS Transparency in Coverage Public Use File (PY2027 release, PY2025 claims), data.healthcare.gov — US Government public domain: https://data.healthcare.gov/
- 29 CFR 2560.503-1 (180 days, and your free right to the claim file): https://www.ecfr.gov/current/title-29/section-2560.503-1
- 45 CFR 147.136 (4 months, and what qualifies): https://www.ecfr.gov/current/title-45/section-147.136
- HealthCare.gov on external review: https://www.healthcare.gov/appeal-insurance-company-decision/external-review/

Cite: Axion Labs — Denial Facts, "Oscar MS appeal form and deadline", https://denialfacts.com/insurers/oscar-health-plan-inc--ms (checked 2026-11-04). free to quote with the URL.