Ambetter skilled nursing denied: how to appeal

Quick answer

If Centene / Ambetter denied your skilled nursing facility, you can appeal, and the plan must give you its file and the criteria it used. Filing windows by plan type: at least 180 days (insured and Marketplace plans); 60 days from the notice (Medicaid managed care); 65 days from the notice (Medicare Advantage). The date printed on your denial notice controls; it can only be later than these floors, never earlier.

Why Centene / Ambetter denies skilled nursing facility

Centene operates one of the largest Medicaid footprints in the U.S. and sells ACA marketplace coverage under the Ambetter brand. Marketplace plans drew elevated regulator and journalist scrutiny in 2024 for higher-than-average denial rates on in-network claims, and Centene-managed Medicaid lines vary plan-by-plan by state.

For skilled nursing facility specifically: Skilled nursing facility (SNF) coverage is denied at admission or, more often, ended mid-stay with a Notice of Medicare Non-Coverage. The clock on these denials is measured in hours, and the appeal runs through the Quality Improvement Organization, not the plan.

The law that controls this appeal

Medicare covers SNF care when the patient needs daily skilled nursing or skilled rehabilitation that can practically be provided only in a SNF (42 CFR 409.31 to 409.35). Coverage does not depend on the patient improving: skilled care to maintain function or prevent decline qualifies (Jimmo v. Sebelius settlement, 2013, and the Medicare Benefit Policy Manual, Chapter 8). Traditional Medicare requires a prior 3-day inpatient hospital stay; many Medicare Advantage plans waive it but must otherwise follow Medicare coverage rules (42 CFR 422.101(b)).

At a glance

Centene / Ambetter appeals: the rule, the deadline and the next level, by plan type

Which row applies depends on the plan you hold, not on Centene / Ambetter's brand. Your ID card, the Summary Plan Description and the denial letter say which.

Plan type	Rule that governs	File your appeal within	The plan must answer	If the plan says no again
Fully insured employer, individual or Marketplace plan The carrier holds the risk and is licensed in your state. Small employers and almost all individual and HealthCare.gov plans.	45 CFR 147.136 (Public Health Service Act § 2719), which applies the 29 CFR 2560.503-1 procedures and adds state external review; state insurance law on top.	At least 180 days from the denial (45 CFR 147.136(b); 29 CFR 2560.503-1(h)(3)(i)).	Urgent care: 72 hours. Pre-service: 30 days. Post-service: 60 days. Prior-authorization decisions by Marketplace issuers from 2026: 72 hours expedited, 7 calendar days standard (CMS-0057-F).	External review through your state's process, or the federal process where the state has none, generally within 4 months of the final internal denial (45 CFR 147.136(c), (d)). The state insurance department and its Consumer Assistance Program take complaints.
Medicaid managed care plan A Medicaid plan run by the carrier under a state contract. The card says Medicaid, Medi-Cal, STAR, HealthChoice or your state's programme name.	42 CFR Part 438, Subpart F (plan appeals) and 42 CFR Part 431, Subpart E (state fair hearings).	60 calendar days from the date on the notice of adverse benefit determination to request the plan's appeal (42 CFR 438.402(c)(2)(ii)). State fair hearing: within 120 calendar days of the plan's appeal decision (§ 438.408(f)(2)).	Standard appeal: 30 calendar days. Expedited: 72 hours (42 CFR 438.408(b)).	A state fair hearing after the plan's single level of appeal (§ 438.402(b)); some states add an external medical review. Benefits continue during the appeal if you ask within 10 calendar days of the notice (§ 438.420).
Medicare Advantage (Part C) A private plan that replaces Original Medicare. The card says Medicare Advantage, HMO, PPO or PFFS.	42 CFR Part 422, Subpart M (§§ 422.560 to 422.634). Coverage decisions must follow Original Medicare rules (42 CFR 422.101).	65 calendar days from the date on the denial notice to request the plan's reconsideration (42 CFR 422.582, as amended effective 1 January 2025).	Expedited: 72 hours. Standard pre-service: 30 days (7 days for Part B drugs). Payment: 60 days (42 CFR 422.590).	If the plan does not fully reverse itself it must send the case to the Independent Review Entity on its own (42 CFR 422.592); then an ALJ hearing when the amount in controversy meets the annual threshold, the Medicare Appeals Council and federal court. State external review does not apply.

Fully insured employer, individual or Marketplace plan

What you can demand. The plan must give you the claim file, the criteria it applied and any new evidence or rationale before the final decision, free of charge (45 CFR 147.136(b)(2)(ii)(C); 29 CFR 2560.503-1(h)(2)(iii)).

How to open the appeal. Cite 45 CFR 147.136 and 29 CFR 2560.503-1: request the claim file and the criteria, note the decision clocks, and name the state external-review right.

Medicaid managed care plan

What you can demand. Free copies of the case file, medical records and the criteria used, before and during the appeal (42 CFR 438.406(b)(5)). Children under 21 have EPSDT rights to medically necessary care (42 U.S.C. 1396d(r)(5)).

How to open the appeal. Cite 42 CFR 438.402 and 438.406(b)(5): request the case file and the criteria, ask for continued benefits within 10 days, and reserve the state fair hearing.

Medicare Advantage (Part C)

What you can demand. The plan may not apply internal criteria that are more restrictive than Medicare's national and local coverage determinations, and must decide medical necessity on your individual circumstances (42 CFR 422.101(b), (c)). You can ask for the case file and the criteria used.

How to open the appeal. Cite 42 CFR 422.582 and 422.101(c): the plan must decide on your individual circumstances under Medicare coverage rules, and must forward an unfavorable reconsideration to the IRE itself.

Reported denial rates

In the CMS Transparency in Coverage data for plan year 2026 (2024 claims), the 27 Centene / Ambetter-family Marketplace issuer filings across 21 states reported in-network claim denial rates from 13.7% to 36.3% (median 18.8%). Issuer-level, self-reported, HealthCare.gov plans only; a denial includes duplicate and administrative denials.

Centene / Ambetter denial rate: every state, three years →

Primary sources for this table

Windows are federal floors or the rule as written; the denial notice controls. Reviewed 13 September 2026. General information, not legal advice; Apellica is not a law firm.

What Centene / Ambetter denies for skilled nursing facility

The skilled nursing facility services most often denied:

SNF admission after a hospital stay for surgery, stroke, fracture, or infection
Continued coverage after the first one to two weeks of a stay
Stays where the plan says the patient has 'plateaued' or 'reached maximum benefit'
Admissions denied because the hospital stay was classed as observation rather than inpatient

Why skilled nursing facility claims get denied

A typical Centene / Ambetter skilled nursing facility denial almost always cites one of these reasons. Each one maps to a specific rebuttal in the appeal:

Plan says the patient no longer needs daily skilled care
Plan says care is 'custodial' or 'maintenance' only
No qualifying 3-day inpatient stay (traditional Medicare, or plans that keep the rule)
Medicare Advantage plan applied an internal algorithm or criteria beyond the Medicare rule
Documentation from the facility does not describe the skilled tasks being performed

The Centene / Ambetter appeal process

Appeal levels: Marketplace: internal appeal then federal external review (IRO). Medicaid: plan appeal then state fair hearing. Medicare Advantage: federal 5-level ladder.

Carrier timing: 180 days from denial for marketplace internal appeals; 4 months / 120 days for federal external review. Medicaid fair-hearing deadlines vary by state, often as short as 90-120 days.

Skilled nursing timing: Notice of Medicare Non-Coverage: contact the QIO no later than noon of the day before the effective date on the notice for fast-track review (42 CFR 405.1200 to 405.1204 for traditional Medicare; 42 CFR 422.626 for Medicare Advantage). If that window is missed, a standard appeal remains available (65 days for Medicare Advantage reconsideration, 42 CFR 422.582). Commercial plans: at least 180 days to file an internal appeal.

What we know about Centene / Ambetter: We confirm the specific Centene subsidiary (Ambetter, Sunshine Health, Wellcare, etc.) before filing, because procedural rules and the supervising regulator change with the line of business.

Common Centene / Ambetter denial patterns for skilled nursing facility

ACA marketplace in-network denials. Ambetter marketplace plans have been documented denying in-network medical claims at rates above the marketplace average. Federal ACA rules guarantee internal appeal plus external review via an Independent Review Organization (IRO), both are no-cost to the member.
Narrow networks driving care-access denials. Ambetter HMO products often run narrower networks than the local competition. Network-adequacy challenges (state DOI complaints citing inadequate specialist access) can convert an out-of-network denial into in-network coverage.
Medicaid managed care fair hearings. Centene-managed Medicaid plans (Sunshine Health, Buckeye, Peach State, etc.) operate under each state's Medicaid rules. After plan-level appeal, members have the right to a state fair hearing, a binding administrative process with strong reversal history.

How to win your Centene / Ambetter skilled nursing facility appeal

Strategy for skilled nursing facility: For a mid-stay cutoff, call the QIO before the deadline on the notice; coverage continues while the QIO decides. Ask the facility for the Detailed Explanation of Non-Coverage and the therapy and nursing notes. Show the specific skilled services being delivered (wound care, IV therapy, therapy that requires a licensed clinician) and, where the plan cites lack of progress, cite the maintenance-coverage standard. For Medicare Advantage denials, cite 42 CFR 422.101(b)(2): the plan may not use criteria more restrictive than Medicare's.

Filed against Centene / Ambetter, that strategy rides on this procedural spine:

Procedural-rights anchor. Cite 45 CFR 147.136 and 29 CFR 2560.503-1: request the claim file and the criteria, note the decision clocks, and name the state external-review right. If your Centene / Ambetter coverage is a different plan type (Medicaid managed care plan, Medicare Advantage), use that row of the table above instead; the rule and the deadline change with the plan, not the carrier.
Criteria-disclosure demand. Centene / Ambetter frequently denies on "not medically necessary" without disclosing the clinical criteria applied. Once disclosed, those criteria become the rebuttal map.
Controlling-standard citation. Medicare covers SNF care when the patient needs daily skilled nursing or skilled rehabilitation that can practically be provided only in a SNF (42 CFR 409.31 to 409.35). Coverage does not depend on the patient improving: skilled care to maintain function or prevent decline qualifies (Jimmo v. Sebelius settlement, 2013, and the Medicare Benefit Policy Manual, Chapter 8). Traditional Medicare requires a prior 3-day inpatient hospital stay; many Medicare Advantage plans waive it but must otherwise follow Medicare coverage rules (42 CFR 422.101(b)).
Treating-provider attestation. A letter from the treating physician addressing each criterion in Centene / Ambetter's own policy language. This is the single strongest evidentiary element.
Requested action. A specific demand to reverse the skilled nursing facility denial and approve the service, not a general "please reconsider."

Documents you'll need for your Centene / Ambetter skilled nursing facility appeal

Notice of Medicare Non-Coverage (or the plan's denial) with the effective date
Detailed Explanation of Non-Coverage from the facility
Nursing notes and therapy notes for the disputed days
Hospital discharge summary and the inpatient admission order
Physician's certification of the need for skilled care

What a skilled nursing facility appeal can recover

Typical recovery for skilled nursing facility cases runs SNF care is billed per day; a denied stay of a few weeks is commonly a five-figure sum in billed charges. The amount at stake depends on the days denied and the plan's rates.. The exact figure depends on the specific service and your plan's contracted rates.

Centene / Ambetter skilled nursing facility appeals: frequently asked questions

The notice says coverage ends tomorrow. Is it too late to appeal Centene / Ambetter?

Not if you call the QIO listed on the notice by noon of the day before the effective date. Ask for a fast-track appeal. Coverage generally continues until the QIO decides.

Centene / Ambetter says my mother is not improving, so coverage stops. Is that right?

Improvement is not the standard. Medicare covers skilled care that maintains function or slows decline when the care itself requires a skilled professional. Ask the facility to document the skilled tasks and cite the maintenance-coverage standard from the Jimmo settlement.

What is the 3-day rule and does it apply to Centene / Ambetter?

Traditional Medicare requires a 3-day inpatient hospital stay before SNF coverage. Observation days do not count. Many Medicare Advantage plans waive the rule; check the Evidence of Coverage. If the hospital stay was classed as observation, that classification can itself be disputed.

Who decides the appeal, Centene / Ambetter or someone independent?

For a fast-track appeal, the Quality Improvement Organization, which is independent of the plan. For a standard Medicare Advantage appeal, the plan decides first and an adverse decision goes automatically to the Independent Review Entity.

What Apellica does for Centene / Ambetter skilled nursing facility appeals

We file appeals against Centene / Ambetter specifically configured to its internal review process. Every skilled nursing facility appeal embeds the criteria-disclosure demand, the procedural-rights anchor, the controlling-standard citation above, treating-provider attestation language, and the peer-reviewed evidence relevant to the denied service.

Cost: $0 upfront. We work on contingency for Centene / Ambetter appeals, if the appeal succeeds, we collect a percentage of the recovered claim value. If it fails, you owe nothing.

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Centene / Ambetter denied your skilled nursing facility? Here is what to do next