Knee replacement cost in 2026: total vs partial, inpatient vs outpatient.

A total knee replacement (TKR, or total knee arthroplasty) is one of the most common major orthopedic surgeries in the United States — roughly 790,000 are performed each year, per the American Academy of Orthopaedic Surgeons. The all-in cost varies enormously by setting and approach: $30,000–$60,000 for an inpatient total knee, $20,000–$35,000 done outpatient at an ambulatory surgery center, and $20,000–$30,000 for a partial (unicompartmental) knee. The number that actually matters, though, is your out-of-pocket — and for most insured patients that lands at their plan's annual out-of-pocket maximum, not the full sticker price. Here's how the pricing works and what you'll really pay.

The full price range by type and setting

"Cost" of a knee replacement can mean the hospital's gross charge (inflated list price), the negotiated/allowed amount your insurer actually pays, or your share. The figures below are typical total billed/allowed amounts — the all-in episode including surgeon, facility, anesthesia, implant, and the standard short rehab.

• Total knee replacement, inpatient (hospital): $30,000–$60,000. High-cost metros and academic centers push the top of this range; the gross "chargemaster" price can exceed $70,000 before any discount.
• Total knee replacement, outpatient (ASC): $20,000–$35,000. Same implant and surgeon work, lower facility overhead. Now the default for healthy patients.
• Partial (unicompartmental) knee replacement: $20,000–$30,000. Less invasive, faster recovery, but only suitable when arthritis is confined to one compartment of the knee.
• Bilateral (both knees at once): $50,000–$100,000+. Higher complication risk; insurers scrutinize medical necessity.
• Revision knee replacement (replacing a worn or failed prior implant): $40,000–$75,000+. More complex than a primary replacement.

What's inside the bill

The total episode is a stack of separate charges that often arrive as separate bills — a leading cause of "surprise" amounts:

• Facility fee (hospital or ASC operating room, recovery, supplies) — usually the single largest line, often 50%–65% of the total.
• Surgeon's fee — $3,000–$8,000 for the orthopedic surgeon.
• Anesthesiology — $1,000–$2,500.
• The implant itself — $3,000–$8,000 for the prosthetic components; robotic-assisted systems can add to this.
• Imaging and pre-op labs — X-rays, possibly an MRI, blood work, EKG.
• Inpatient room and board (inpatient only) — $2,000–$3,000+ per night for the typical 1–2 night stay.
• Physical therapy — weeks of post-op rehab, billed separately, often $75–$350 per session.

Because these come from different providers, confirm each is in-network. The surgeon being in-network doesn't guarantee the anesthesiologist or the facility is. Where they aren't, the No Surprises Act can protect you from balance billing for certain non-network providers at an in-network facility.

Inpatient vs outpatient: why the setting moves the price so much

Until recently, knee replacement was almost always an inpatient procedure with a multi-night hospital stay. Two things changed that:

1. Medicare removed total knee replacement from its "inpatient-only" list in 2018, and removed total hip in 2020, opening the door to outpatient and ASC procedures.
2. Better pain control, minimally invasive techniques, and "rapid recovery" protocols now let many healthy patients go home the same day.

Outpatient at an ambulatory surgery center typically runs $10,000–$25,000 less than the same surgery inpatient, almost entirely because the facility fee is lower. For a patient who's a good candidate (generally healthier, fewer comorbidities, good home support), outpatient is both cheaper and associated with comparable or better recovery outcomes in the orthopedic literature. Ask your surgeon whether you qualify — it can meaningfully cut your facility-fee exposure.

One nuance worth understanding: the words "inpatient" and "outpatient" describe a billing status, not how many nights you sleep in a bed. A patient can stay overnight and still be classified as outpatient under "observation" status, which is billed through Part B rather than Part A on Medicare. That distinction changes your cost share, and it's set by the hospital's coding, not by you. If you're on Original Medicare, ask the admitting staff in plain language whether you are being admitted as inpatient or kept under observation, and get the answer in writing before surgery. The same physical care can produce two different bills depending on that single label.

Outpatient candidacy isn't only about cost. Surgeons screen for body-mass index, heart and lung conditions, diabetes control, and whether someone at home can help during the first few days. A patient who lives alone, uses blood thinners, or has sleep apnea may be steered toward an overnight stay for safety reasons, and that's a clinical call, not a billing trick. Push for the cheaper setting where it's appropriate, but don't argue your way out of an admission your surgeon thinks you need.

Robotic-assisted knee replacement: worth the premium?

Robotic-assisted systems (Stryker Mako, Zimmer ROSA, and others) use a pre-op CT to plan and a robotic arm to improve implant-positioning precision. They can add $1,000–$5,000 to the bill. The evidence on whether they improve long-term outcomes versus conventional technique is still mixed; some studies show better early alignment and slightly faster early recovery, but long-term implant survival data is comparable. If your insurer covers it at no added cost-share, there's little downside; if it triggers extra out-of-pocket, weigh it carefully and ask your surgeon for their specific outcome data.

What insurance actually pays

Knee replacement is a covered, medically-necessary procedure under essentially all commercial plans, Medicare, and Medicaid — once conservative treatment (physical therapy, injections, weight management, anti-inflammatories) has been tried and documented. Most plans require prior authorization. Here's how the money flows on a typical commercial PPO:

• The hospital bills its gross charge (say, $55,000).
• Your insurer's allowed amount (the negotiated rate) might be $30,000.
• You pay your deductible, then coinsurance (commonly 10%–30%) on the allowed amount, until you hit your out-of-pocket maximum.
• Because a knee replacement is so expensive, you almost always blow straight through your deductible and hit your out-of-pocket max in the same procedure.

Your realistic out-of-pocket

This is the figure to plan around. For an insured patient, your knee-replacement out-of-pocket is effectively capped at your plan's annual out-of-pocket maximum — for 2026, the ACA caps in-network out-of-pocket at $9,200 for an individual and $18,400 for a family (employer and marketplace plans set their own limits at or below these federal caps).

• Typical commercial PPO/HDHP: $3,000–$9,200, landing at your out-of-pocket max in most cases.
• Original Medicare (Part A + B): The Part A hospital deductible is $1,676 per benefit period in 2026 for an inpatient stay; outpatient falls under Part B (20% coinsurance after the Part B deductible, with no annual cap unless you have Medigap or a Medicare Advantage out-of-pocket limit).
• Medicare Advantage: Subject to the plan's annual out-of-pocket maximum (federally capped, often $6,000–$9,000 in-network).
• Uninsured / cash-pay: The full $20,000–$60,000 — but cash patients can frequently negotiate bundled rates well below the gross charge. Some surgery centers publish all-in cash prices.

To model your specific number, plug your deductible, coinsurance, and out-of-pocket max into our out-of-pocket cost calculator. If you're choosing between an HDHP and a PPO for a year you know you'll have surgery, the deductible-vs-pay calculator shows which plan design costs less overall.

Why two people pay wildly different amounts for the same surgery

Patients are sometimes shocked to learn that the person in the next recovery bay paid a third of what they did for the identical implant and surgeon. A handful of factors explain most of that gap:

• Plan design. A patient with a $1,500 deductible and a $4,000 out-of-pocket max pays far less than someone on a high-deductible plan with a $9,200 max. Same surgery, different ceiling.
• Where in the plan year it happens. Surgery in November, after a year of doctor visits and prescriptions, often lands on a deductible that's already partly or fully met. The same operation in January starts from zero.
• Network status of every provider. One out-of-network anesthesiologist or pathology lab can pull a chunk of the bill outside the negotiated rate.
• The negotiated rate itself. Insurers strike different prices with different hospitals. A large system in a competitive market may have a lower allowed amount than a sole-community hospital with no nearby rival.
• Whether the patient asked. People who request itemized bills, dispute coding errors, and apply for financial assistance routinely end up paying less than people who pay the first statement that arrives.

None of these are luck. They're levers, and most are at least partly in your control if you start before the surgery is scheduled rather than after the bills land.

Regional variation: geography moves the price

The same total knee replacement can cost noticeably more in one metro than another, and the difference isn't about quality. Facility fees and negotiated rates track local labor costs, hospital market concentration, and real estate. High-cost coastal metros and major academic medical centers sit at the top of every range quoted above; smaller cities, the South, and parts of the Midwest tend to run lower. Hospital-owned outpatient departments often charge more than freestanding ambulatory surgery centers performing the identical procedure a few miles away, purely because of how the facility is licensed and how its fees are structured.

For insured patients, geography matters less than it looks, because your out-of-pocket is still capped by your plan. It matters most to cash-pay patients and to anyone on a plan with coinsurance that hasn't hit its ceiling yet. Hospitals now publish machine-readable price files and a consumer-friendly shoppable-services list under federal price-transparency rules; the negotiated rates are public, even if the files are clunky to read. If you have flexibility on where you have surgery, comparing the published rates at two or three in-network facilities can surface a meaningful spread.

Frequently asked questions

How long does a knee replacement implant last?

Modern total knee implants are commonly cited as lasting 15 to 20 years or longer for most patients, with the majority still functioning well at 15 years in long-term registry data. Younger and more active patients wear implants faster and are statistically more likely to need a revision down the line, which is one reason surgeons sometimes encourage delaying surgery in patients under 60 when symptoms allow.

Does Medicare cover knee replacement?

Yes. It's a covered, medically necessary procedure once conservative treatment has been tried. An inpatient stay falls under Part A; an outpatient or observation procedure falls under Part B. Original Medicare has no annual out-of-pocket cap on its own, which is why many enrollees carry a Medigap policy or choose Medicare Advantage, both of which limit total exposure.

Will I need to meet my deductible twice if pre-op and surgery cross January 1?

If the pre-op workup lands in December and the surgery in January, the two events fall in different plan years, and yes, you'd face a fresh deductible in the new year. Where the timing is flexible, keeping the whole episode inside one plan year usually saves money. The exception is if you've met nothing yet this year and have already met your deductible for next year for some other reason, which is rare.

Can I use HSA or FSA money for a knee replacement?

Yes. The procedure, the implant, the anesthesia, the physical therapy, and related prescriptions are all qualified medical expenses. Paying with pre-tax HSA or FSA dollars effectively discounts the bill by your marginal tax rate. See our FSA-eligible items guide for what else counts, and the HSA tax calculator to estimate the savings.

What should I ask before scheduling?

Ask whether you qualify for outpatient surgery, whether the facility, surgeon, anesthesiologist, and rehab provider are all in-network, what the plan's prior-authorization requirements are, and for a written Good Faith Estimate if you're uninsured. Those four questions surface most of the avoidable costs.

How to lower a knee-replacement bill

1. Choose an ASC over a hospital if you're a candidate — the single biggest lever, often $10K–$25K off the total.
2. Time it within one plan year. If you've already met your deductible from earlier care, scheduling before year-end means surgery happens after you've absorbed the deductible, not on top of a fresh one. Don't split pre-op and surgery across two plan years if you can avoid resetting your deductible.
3. Confirm every provider is in-network — facility, surgeon, anesthesiologist, and the PT group.
4. Request a Good Faith Estimate. Uninsured and self-pay patients are entitled to one under the No Surprises Act; if the final bill exceeds it by $400+, you can dispute it.
5. Ask for the cash/prompt-pay rate if uninsured — it's often a fraction of the chargemaster price.
6. Apply for hospital charity care if your income qualifies; non-profit hospitals are required to have a financial-assistance policy.
7. Negotiate and set up a payment plan for the balance. See our medical-bill negotiation guide for the step-by-step script.

Paying the out-of-pocket portion

Even capped at the out-of-pocket max, a $3,000–$9,200 share is real money. Options:

• HSA/FSA dollars — a knee replacement is unquestionably a qualified medical expense, so pay with pre-tax funds if you have them.
• Hospital interest-free payment plan — ask first; many systems offer 12–24 month no-interest plans.
• Medical financing — if you use a card like CareCredit, understand the deferred-interest mechanics first; see our CareCredit promo-period strategy.

Bottom line

A knee replacement carries a $20,000–$60,000 sticker depending on whether it's partial or total and done outpatient or inpatient — but as an insured patient, your real exposure is your plan's out-of-pocket maximum, typically $3,000–$9,200 in 2026. The biggest cost lever you control is the setting: an ambulatory surgery center can save five figures over a hospital for the identical operation. Confirm every provider is in-network, request a Good Faith Estimate, time the surgery within a single deductible year, and pay the balance with pre-tax HSA/FSA dollars or an interest-free plan.

Shirley Chia — Researcher & Editor

Editor of HealthCostHub. Researches healthcare pricing, financing, and tax-advantaged accounts.

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Pricing reference only — not medical or financial advice. Actual costs vary by region, facility, surgeon, implant, and your specific insurance plan. Verify all figures with your provider and insurer. Last updated June 2026.