Aetna denied your inpatient rehab? What to do next

Why Aetna (CVS Health) denies inpatient rehabilitation

Aetna, owned by CVS Health since 2018, runs commercial group plans, Medicare Advantage, and a large pharmacy benefit footprint via Caremark. GLP-1, specialty drug, and behavioral health denials are the highest-volume categories.

For inpatient rehabilitation specifically: Inpatient rehabilitation facility (IRF) stays are denied at admission or cut short mid-stay, usually on the argument that a lower level of care such as a skilled nursing facility would do. The appeal turns on the medical record showing why intensive, physician-supervised rehabilitation is required.

The law that controls this appeal

For Medicare and Medicare Advantage, the IRF coverage criteria at 42 CFR 412.622(a)(3): a need for active and ongoing therapy in at least two disciplines (one being PT or OT), an intensive program (generally 3 hours a day at least 5 days a week), close physician supervision, and a reasonable expectation of measurable improvement. Medicare Advantage plans may not apply stricter internal criteria than traditional Medicare (42 CFR 422.101(b)). Commercial plans apply their own level-of-care criteria (often MCG or InterQual), which must be disclosed on request under 29 CFR 2560.503-1 and 45 CFR 147.136.

What Aetna (CVS Health) denies for inpatient rehabilitation

The inpatient rehabilitation services most often denied:

IRF admission after stroke, brain injury, spinal cord injury, hip fracture, or major joint replacement
Continued-stay days once the plan decides goals can be met at a lower level of care
Transfer from an acute hospital to IRF instead of a skilled nursing facility
Rehab after cardiac surgery, transplant, or prolonged ICU stay (deconditioning)

Why inpatient rehabilitation claims get denied

A typical Aetna (CVS Health) inpatient rehabilitation denial almost always cites one of these reasons. Each one maps to a specific rebuttal in the appeal:

Plan says a skilled nursing facility or home health is 'the appropriate level of care'
Therapy intensity (3 hours a day) is judged not tolerable or not required
No documented need for daily physician supervision
Pre-admission screening or physician certification missing from the record
Medicare Advantage plan applied internal criteria beyond the IRF rule

The Aetna (CVS Health) appeal process

Appeal levels: Internal level 1 (30 days standard / 72h urgent), then external IRO review (45 days standard).

Carrier timing: 180 days from denial for internal appeal; generally at least 4 months (120 days) from the final internal denial for federal external review (exact window varies by plan and state — check your denial letter).

Inpatient rehab timing: Medicare Advantage: request reconsideration within 65 days of the notice; expedited decisions within 72 hours (42 CFR 422.582, 422.584). When an IRF stay is being ended, the facility issues a Notice of Medicare Non-Coverage and the patient can ask the QIO for fast-track review by noon of the day before coverage ends (42 CFR 422.626). Commercial and employer plans: at least 180 days to file an internal appeal; urgent pre-service decisions within 72 hours (29 CFR 2560.503-1; 45 CFR 147.136).

What we know about Aetna (CVS Health): Aetna's internal appeals respond well to peer-to-peer review requests filed alongside the written appeal.

Common Aetna (CVS Health) denial patterns for inpatient rehabilitation

GLP-1 / Wegovy denials citing BMI. Aetna denies most weight-loss GLP-1 prescriptions citing BMI thresholds or 'lifestyle modification first' criteria. When a patient has documented comorbidities (such as type 2 diabetes) and the treating clinician determines a diabetes-indicated GLP-1 is medically appropriate, an appeal built on that documented clinical picture is often reversed quickly — the medication and indication remain the clinician's decision, never a path chosen simply to obtain coverage.
Caremark formulary denials. Aetna's pharmacy benefit (Caremark) issues formulary denials separate from medical benefit denials. Each requires its own appeal track, confusing the two costs weeks.
Internal appeal then external review. Aetna's first appeal is internal and is generally filed within 180 days of the denial. After a final internal denial, external review by an Independent Review Organization (IRO) is a separately strong reversal lane; under the federal ACA standard members generally have at least 4 months (120 days) to request it, though the exact window varies by plan and state — confirm the deadline printed on your denial letter.

How to win your Aetna (CVS Health) inpatient rehabilitation appeal

Strategy for inpatient rehabilitation: Get the rehabilitation physician's admission note, the pre-admission screening, and the therapy evaluations. Map each element of the IRF criteria to a page in the record: multiple disciplines, intensity, medical supervision, expected improvement. For Medicare Advantage, cite 42 CFR 422.101(b)(2), which binds the plan to traditional Medicare coverage rules. If the patient is already admitted and the plan is ending coverage, use the fast-track review (see Timing) before the effective date so services continue during review.

Filed against Aetna (CVS Health), that strategy rides on this procedural spine:

Procedural-rights anchor. Every Aetna (CVS Health) denial triggers ERISA § 503 or 45 C.F.R. § 147.136 procedural rights. The cover letter invokes these in the opening paragraph to lock the timeline and force criteria disclosure.
Criteria-disclosure demand. Aetna (CVS Health) frequently denies on "not medically necessary" without disclosing the clinical criteria applied. Once disclosed, those criteria become the rebuttal map.
Controlling-standard citation. For Medicare and Medicare Advantage, the IRF coverage criteria at 42 CFR 412.622(a)(3): a need for active and ongoing therapy in at least two disciplines (one being PT or OT), an intensive program (generally 3 hours a day at least 5 days a week), close physician supervision, and a reasonable expectation of measurable improvement. Medicare Advantage plans may not apply stricter internal criteria than traditional Medicare (42 CFR 422.101(b)). Commercial plans apply their own level-of-care criteria (often MCG or InterQual), which must be disclosed on request under 29 CFR 2560.503-1 and 45 CFR 147.136.
Treating-provider attestation. A letter from the treating physician addressing each criterion in Aetna (CVS Health)'s own policy language. This is the single strongest evidentiary element.
Requested action. A specific demand to reverse the inpatient rehabilitation denial and approve the service, not a general "please reconsider."

Documents you'll need for your Aetna (CVS Health) inpatient rehabilitation appeal

The denial or non-coverage notice with its effective date
Rehabilitation physician admission note and pre-admission screening
PT, OT and speech therapy evaluations and daily notes
Acute hospital discharge summary
Any plan-issued clinical criteria (request them in writing)

What a inpatient rehabilitation appeal can recover

Typical recovery for inpatient rehabilitation cases runs An IRF stay is billed per day at rates that make even a short denied stay a significant sum; the amount at stake depends on the length of stay and the plan's allowed amount.. The exact figure depends on the specific service and your plan's contracted rates.

Aetna (CVS Health) inpatient rehabilitation appeals: frequently asked questions

Can Aetna (CVS Health) send me to a nursing home instead of inpatient rehab?

The plan can propose it, and you can appeal it. The question the reviewer must answer is whether the record shows a need for intensive, multidisciplinary, physician-supervised rehabilitation. If it does, a skilled nursing facility is not an equivalent level of care.

How fast does a Aetna (CVS Health) inpatient rehab appeal move?

Pre-admission and continued-stay disputes qualify as urgent because delay can jeopardize recovery. Urgent decisions are due within 72 hours. For Medicare Advantage, a fast-track QIO review requested before the effective date keeps coverage in place during the review.

Does the three-hour rule mean I have to do three hours of therapy every day?

The Medicare IRF criteria describe an intensive program that generally means 3 hours a day at least 5 days a week, but the rule allows the intensity to be measured over a 7-day period in individual cases and does not require it from day one for every patient. The physician's documentation of why the patient needs and can participate in the program is what matters.

What if Aetna (CVS Health) already cut off my stay?

Appeal anyway. A retrospective appeal can recover days the plan refused to cover, and the medical record from those days is the evidence.

What Apellica does for Aetna (CVS Health) inpatient rehabilitation appeals

We file appeals against Aetna (CVS Health) specifically configured to its internal review process. Every inpatient rehabilitation 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 Aetna (CVS Health) appeals, if the appeal succeeds, we collect a percentage of the recovered claim value. If it fails, you owe nothing.

Start your Aetna (CVS Health) inpatient rehabilitation appeal

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Aetna (CVS Health) denied your inpatient rehabilitation? Here is what to do next