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.

Partial vs total: how surgeons decide, and why price shouldn't

A partial replacement resurfaces just one of the knee's three compartments, most often the inner (medial) side, and leaves your ligaments and the remaining healthy cartilage alone. Recovery is faster, the incision smaller, and the knee tends to feel more natural afterward. The catch is eligibility: only patients whose arthritis is genuinely confined to a single compartment qualify, and that's a minority of the people who walk into a surgeon's office with bone-on-bone pain. National joint-registry data also shows partials carry a higher lifetime revision rate than totals, partly because arthritis can keep progressing in the compartments left untouched. When a partial fails, the fix is usually conversion to a total knee — a second surgery with a second bill.

So while the partial's $20,000–$30,000 sticker undercuts the total's, don't pick the operation on price. Ask the surgeon which procedure your imaging actually supports, how many partials they do per year, and what their conversion rate has been. A well-chosen total that lasts 20 years is cheaper than a marginal partial that needs revision in eight.

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.

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 $10,600 for an individual and $21,200 for a family (employer and marketplace plans set their own limits at or below these federal caps).

• Typical commercial PPO/HDHP: $3,000–$10,600, landing at your out-of-pocket max in most cases.
• Original Medicare (Part A + B): The Part A hospital deductible is $1,736 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.

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–$10,600 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.

The recovery costs nobody quotes you up front

The surgery-day estimate rarely captures everything you'll spend over the following three months. Budget for these:

• Physical therapy volume. Most patients complete somewhere between 12 and 30 outpatient PT sessions over 6–12 weeks. At the $75–$350 per-session rates above, with a typical $20–$75 copay per visit on commercial plans, the copays alone can add $300–$1,500 even after you've hit your surgical out-of-pocket in a prior plan year.
• Durable medical equipment. A walker for the first weeks, then a cane; many patients also buy an ice-therapy machine, a raised toilet seat, and a shower chair. Insurance often covers a basic walker with a prescription, but the comfort items, usually $100–$300 combined, come out of pocket.
• Home health or skilled nursing. Most patients now go straight home with outpatient or in-home PT. If you need a short skilled-nursing stay instead, coverage rules get strict: Original Medicare pays for skilled nursing only after a qualifying inpatient hospital stay, and a same-day outpatient knee doesn't qualify. Check the discharge plan against your coverage before surgery, not after.
• Time off work. Desk workers commonly return in 4–6 weeks; jobs involving lifting, climbing, or long periods on your feet can take three months. If you lack paid leave or short-term disability coverage, lost wages can exceed every medical bill on this page.
• Follow-up visits and imaging. Expect several surgeon visits and X-rays across the first year, each carrying its own copay.

Common questions

How long does a knee implant last?

Longer than most people assume. A 2019 meta-analysis in The Lancet covering national joint registries found roughly 82% of total knee replacements still functioning at 25 years. Younger and more active patients wear implants faster and face higher revision odds, which is one reason surgeons sometimes ask patients in their 40s and early 50s to wait.

Will Medicare approve my knee replacement?

Yes, when it's medically necessary and your records document that conservative treatment was tried first. Inpatient stays fall under Part A and its deductible; outpatient procedures bill under Part B with 20% coinsurance after the Part B deductible, as covered above. Medicare Advantage plans cover the procedure too but nearly always require prior authorization, so build a few extra weeks into your scheduling.

Can I compare prices before I commit?

You can. Hospitals must publish payer-specific negotiated rates under the federal hospital price-transparency rule, and insurers are required to offer cost-estimator tools for scheduled care. The published data is messy, but comparing two or three in-network facilities in your area frequently reveals five-figure spreads for the identical operation with similarly credentialed surgeons.

Is it cheaper to put surgery off another year?

Usually not. Delay means more injections, more PT, more imaging, and often a stiffer knee that rehabs more slowly once you finally operate. If surgery is inevitable, the money questions worth asking are which plan year and which setting — not whether the operation itself will get cheaper. It won't.

What to do before you schedule

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–$10,600 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.