Yes, Medicare covers in-home care after knee replacement, but only if you meet specific eligibility requirements. The two big ones: you must need skilled medical services (like physical therapy or wound care), and you must qualify as “homebound.” If both conditions are met, Medicare pays 100% of covered home health services with no copay or deductible. That’s a detail many people miss, and it makes home health one of the more generous parts of the Medicare benefit.
Who Qualifies as Homebound
Medicare’s homebound requirement trips up a lot of people because it sounds stricter than it actually is. After a knee replacement, most patients qualify for at least the first several weeks of recovery. You’re considered homebound if leaving your home is a major effort because of your condition, if it’s not recommended by your doctor, or if you need help getting around (using a walker, crutches, wheelchair, or another person’s assistance).
You don’t have to be completely bedridden. Medicare allows occasional trips outside the home for medical appointments, religious services, or infrequent short outings. The key is that leaving home takes considerable effort. If you’re hobbling around on a walker six days post-op, that counts. Once you’re comfortably driving to the grocery store, it likely doesn’t.
What Services Medicare Covers at Home
The covered services fall into a few categories, and after knee replacement, you’ll likely use more than one. Skilled nursing visits cover wound care, monitoring for infection, managing pain medications, and checking for blood clots. Physical therapy, which is the backbone of knee replacement recovery, is covered when a therapist comes to your home to guide you through range-of-motion exercises, strengthening, and safe movement patterns. Occupational therapy is also covered and focuses on helping you handle daily tasks like bathing, dressing, and navigating stairs while your knee heals.
Home health aides can assist with personal care like bathing, grooming, and getting in and out of bed, but only when you’re also receiving a skilled service like physical therapy or nursing. The aide visits are an add-on, not a standalone benefit. Medicare won’t cover an aide who simply helps around the house without a skilled care component in place.
All of these services must be ordered by a physician and delivered by a Medicare-certified home health agency. Your doctor also needs to establish a plan of care that outlines what services you need and how often.
The Face-to-Face Requirement
Before home health can begin, your doctor (or a qualifying nurse practitioner or physician assistant) must have a face-to-face encounter with you and document it. This can happen during your hospital stay before discharge, during a follow-up visit, or even via telehealth in some cases. The physician then certifies that you’re homebound and need skilled care. Without this certification and the supporting clinical documentation, Medicare won’t approve the benefit.
If you’re having a planned knee replacement, this is worth discussing with your surgeon before the operation. Most orthopedic practices handle the referral and certification routinely, but confirming the plan in advance helps avoid delays in getting a home health agency set up for the day you come home.
What Medicare Does Not Cover
Medicare draws a clear line between skilled medical care and help with daily living. Services whose sole purpose is to help you stay comfortable at home, like cooking, cleaning, laundry, grocery shopping, and meal delivery, are explicitly excluded. If you need that kind of support, you’ll pay out of pocket or look into other programs.
Full-time or around-the-clock care is also not covered. Medicare defines “part-time or intermittent” as fewer than 8 hours per day and 28 or fewer hours per week (up to 35 hours in some cases, subject to review). A patient who needs continuous skilled nursing over an extended period generally doesn’t qualify for the home health benefit and would more likely need a skilled nursing facility. For most knee replacement patients, though, the intermittent visits are sufficient. Typical home health after joint replacement involves a few therapy sessions per week plus periodic nursing check-ins.
Equipment for Home Recovery
Separately from home health services, Medicare Part B covers durable medical equipment prescribed for use in your home. After knee replacement, this commonly includes a walker, cane, or crutches. Part B pays 80% of the Medicare-approved amount after you meet your annual deductible, leaving you responsible for the remaining 20%. If your equipment supplier accepts Medicare assignment, they can only charge you that 20% coinsurance. If the supplier doesn’t accept assignment, you could face higher charges, so it’s worth confirming before you rent or buy.
Some patients also use a continuous passive motion (CPM) machine at home, though its use has become less standard in recent years. If your surgeon prescribes one, the same 80/20 cost-sharing applies.
Medicare Advantage Plans Work Differently
If you have a Medicare Advantage plan (Part C) instead of Original Medicare, your home health benefit may look different in practice. Medicare Advantage plans are required to cover at least the same services as Original Medicare, but they can add requirements that affect your access. Many plans require prior authorization before home health services begin, and some charge copayments for home health visits that Original Medicare does not.
Research published in Medical Care found that Medicare Advantage enrollees in plans with cost-sharing and prior authorization requirements had a lower probability of receiving home health care compared to those in Original Medicare. Some enrollees even switched plans after encountering unexpected copayments. If you’re on a Medicare Advantage plan, call your plan before surgery to ask specifically about prior authorization timelines and any out-of-pocket costs for home health. Getting caught off guard after you’re already home and recovering is the last thing you need.
How Long Coverage Typically Lasts
Medicare doesn’t set a fixed number of home health visits or a hard cutoff date. Coverage continues as long as you remain homebound, still need skilled care, and your doctor recertifies the plan of care (usually every 60 days). For knee replacement patients, home health physical therapy commonly lasts 3 to 6 weeks before transitioning to outpatient therapy at a clinic. Some patients with complications or slower recoveries stay on home health longer.
The transition point usually comes naturally. Once you’re mobile enough to leave home without significant difficulty, you no longer meet the homebound definition, and home health coverage ends. At that point, outpatient physical therapy picks up under Medicare Part B, with the standard 20% coinsurance after your deductible.