Does United Healthcare Cover Inpatient Rehab? Costs, Plans, and Approval

Yes, UnitedHealthcare does cover inpatient rehab, both for physical recovery (after a stroke, surgery, or serious injury) and for substance use disorder or mental health treatment. Coverage requires that the stay be medically necessary, nearly every admission needs prior authorization, and the specific days, copays, and facility rules depend on which UnitedHealthcare plan you hold.

Physical Rehab: Two Different Facility Types, Two Different Rules

UnitedHealthcare pays for stays at inpatient rehabilitation facilities (sometimes called acute rehab hospitals) and at skilled nursing facilities. They are not interchangeable, and the admission bar is higher for one than the other.

For an inpatient rehabilitation facility, a physician has to certify that you need intensive rehab, ongoing medical supervision, and coordinated therapy from more than one discipline. UnitedHealthcare’s medical policy requires active therapeutic intervention from at least two disciplines, one of which must be physical therapy or occupational therapy. The rehab program generally has to involve at least three hours of therapy per day, five days a week, and a rehabilitation physician must see you face-to-face at least three days per week to track progress.¹ You must be expected to make measurable functional improvement, though full recovery is not required.

Skilled nursing facility coverage runs on different rules. A stay is covered for up to 100 days per benefit period, but you first need to have spent at least three consecutive days as a hospital inpatient (the “3-day rule”), the facility must be Medicare-certified, and the care you need must be the kind that can only be delivered in that setting.²

The consistent thread for both settings is skilled care. UnitedHealthcare’s policy states that therapy services must require the skill of a trained therapist. If an unskilled person could safely perform the task, it isn’t considered skilled care, even when a licensed professional happens to deliver it.¹

What You’ll Pay Under Medicare and Medicare Advantage

For members on Original Medicare, which UnitedHealthcare supplements or administers through Medicare Advantage, inpatient rehab facility cost-sharing in 2026 tiers like this: after a Part A deductible of $1,736, days 1 through 60 carry no additional daily cost. Days 61 through 90 cost $434 per day. Beyond 90 days, you can draw on 60 lifetime reserve days at $868 per day; once those run out, you pay the full cost.³ If you’re transferred directly from an acute care hospital to rehab, or admitted within 60 days of a hospital discharge in the same benefit period, you generally won’t owe a second deductible.²

For skilled nursing under Original Medicare, days 1 through 20 are fully covered after the deductible, days 21 through 100 have a daily coinsurance, and day 101 onward is on you.³

UnitedHealthcare Medicare Advantage plans can structure these costs differently. Some dual-eligible plans charge $0 copays for the full 100-day skilled nursing benefit when you use in-network facilities.⁴ The reliable way to know your exact cost-sharing is to read your plan’s Evidence of Coverage or call the number on your member ID card.¹

Inpatient Rehab for Substance Use and Mental Health

UnitedHealthcare also covers inpatient treatment for substance use disorders and mental health conditions, and the approval path works differently than physical rehab. Under the Affordable Care Act, all marketplace plans must include substance use disorder treatment as an essential health benefit, with no annual or lifetime dollar caps. The Mental Health Parity and Addiction Equity Act requires that financial and treatment limits on mental health and addiction services cannot be more restrictive than those for medical and surgical care.⁵

Behavioral health benefits are managed by Optum (operating as United Behavioral Health). Optum handles prior authorizations and medical necessity decisions across UnitedHealthcare’s commercial, marketplace, Medicare Advantage, and Medicaid plans.⁶⁷⁸ For adult mental health placements, it uses the Level of Care Utilization System (LOCUS).

Unlike skilled nursing, UnitedHealthcare does not publish a fixed cap on covered days for inpatient addiction treatment. Coverage duration is tied to ongoing medical necessity reviews, so authorizations are granted in increments and extended as long as the clinical picture supports continued inpatient care. Benefits and cost-sharing vary by plan and state, and UnitedHealthcare directs members to the 24-hour Substance Use Helpline at 1-855-780-5955 for specifics.⁹

Prior Authorization Is Almost Always Required

Whether the rehab is for a physical condition or a substance use disorder, UnitedHealthcare requires prior authorization for essentially every inpatient rehab admission. On the physical side, this applies to acute inpatient rehab, skilled nursing, and long-term acute care hospitals.¹⁰ For Medicare Advantage, post-acute care requests are routed through naviHealth under UnitedHealthcare’s Continued Care program.¹¹ Behavioral health admissions go through Optum’s Provider Express portal, where the treating provider submits clinical documentation.⁶

Emergency admissions are generally exempt from prior authorization, but notification is still expected within 24 hours of admission.¹²

How Coverage Differs by Plan

There is no single UnitedHealthcare answer on inpatient rehab. Benefits turn on which plan you hold:

Employer-sponsored plans. Benefits follow the employer’s plan document. Most cover inpatient rehab and skilled nursing when medically necessary, but copays, coinsurance, deductibles, and day limits vary widely. PPO plans allow more flexibility in choosing a facility; HMO plans restrict you to in-network providers.
Individual and marketplace (ACA) plans. These must cover substance use and mental health inpatient services as essential health benefits and must comply with parity. Cost-sharing depends on your plan’s metal tier and state.
Medicare Advantage. Must cover everything Original Medicare covers, but can structure cost-sharing differently. Some dual-eligible plans drop copays to zero for in-network stays.⁴
Medicaid managed care (Community Plans). Covered services and limits follow the state Medicaid program. Behavioral health runs through Optum, and a PCP referral generally isn’t required to access behavioral care.¹³

How to Confirm Your Own Benefits

Before a planned inpatient rehab stay, verify what your plan actually covers. UnitedHealthcare offers a few routes:

Sign in at member.uhc.com or through the UnitedHealthcare app to view benefit details any time.¹⁴
Call the number on the back of your member ID card. For general employer-sponsored plans, the line is 1-866-801-4409; for Medicare Supplement plans, 1-800-523-5800. Marketplace numbers vary by state.¹⁴
For addiction treatment, call the Substance Use Helpline at 1-855-780-5955. Recovery advocates can explain coverage, locate in-network providers, and walk through treatment options. The call is free, confidential, and anonymous.⁹

When you call, have your ID card handy and ask specifically about prior authorization, in-network facilities, the number of covered days, and the deductible, copay, and coinsurance that apply.

If Your Rehab Coverage Is Denied

Denials happen, and you have appeal rights. For Medicare Advantage members, the appeal must be filed within 65 calendar days of the denial notice. You can submit it in writing using UnitedHealthcare’s appeals and grievance form or call the number on your ID card. Standard appeals are decided within 30 days. If the standard timeline could jeopardize your health or recovery, you can request an expedited appeal, which must be decided within 72 hours. If UnitedHealthcare upholds the denial on internal review, the case is automatically referred to an independent external reviewer.¹⁵

Appeals can also be filed online through UnitedHealthcare’s Medicare appeals portal, which accepts supporting documents like medical records, letters from treating physicians, and the original denial letter.¹⁶ A family member, physician, or other representative can file on your behalf with proper authorization.

What’s Included During a Covered Stay

Across plan types, a covered inpatient rehab stay generally includes physical therapy, occupational therapy, speech-language pathology, a semi-private room, meals, nursing services, prescription drugs administered during the stay, and hospital supplies.³ Items typically not covered include a private room (unless medically necessary), private-duty nursing, separately billed televisions and telephones, and personal items like toiletries.² Coverage does not hinge on whether you’re expected to recover fully; it hinges on whether you need skilled care to treat the illness or injury.

1
UHCProvider.com. Skilled Nursing Facility, Rehabilitation, Long-Term Acute Care Hospital, and Private Duty Nursing Medical Policy
2
UHC.com. Medicare Coverage for Inpatient Rehabilitation
3
Medicare.gov. Inpatient Rehabilitation Care
4
UHC.com. UHC Dual Complete MT-S001 Summary of Benefits
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Healthcare.gov. Mental Health and Substance Abuse Coverage
6
Provider Express. Prior Authorization Information
7
Provider Express. Guidelines and Policies
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Optum Alaska. SUD Level of Care Training
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UHC.com. Substance Use Resources
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UHCProvider.com. Commercial Advance Notification and Prior Authorization Requirements
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UHCProvider.com. TX UHC Connected Medicare-Medicaid Prior Authorization Requirements
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Optum. Colorado Prior Authorization List
13
UHCProvider.com. FL Care Provider Manual Statewide Medicaid Managed Care
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UHC.com. Contact Us
15
UHC.com. Medicare Appeal
16
UnitedHealthcare Member Forms. Medicare Plan Appeals and Grievances