This is a patient demand report for joint replacement practice owners, surgery center operators and marketing leads. It shows what patients pay for knee replacement in a surgery center or a hospital, what Medicare pays your practice, what the evidence says, and what patients find when they search before they call. The practice-side facts come first; the patient detail below is the evidence behind them.
For practice owners: what this search looks like from your side
Some facts, side by side.
Surgery center knee replacements rose from 104,971 in 2018 to 539,175 in 2022, a 413.6% increase. The same study projects more than 2.1 million a year by 2040. (JAAOS, 2026)
For 2026, Medicare raised its surgery center rate for the operation by 1.5%, while the surgeon fee you bill fell 7.3% to about $1,165. (AAHKS summary)
On national rates, a Medicare patient’s facility share is about $140 higher in a surgery center than in a hospital outpatient department, even though Medicare pays the center about $3,700 less.
Three surgery centers I found publish a single cash price for a knee replacement, between $19,300 and $21,500 where the implant is included. The cost guides that rank for this comparison quote national ranges instead.
What those mean together for your practice is for you to work out. My guide to marketing total joint replacement in an ASC covers the owner side in more depth.
If you want to see how your joint replacement pages answer the setting and price question today, book a 30-minute call. I will look at your site and your market before we talk. You can also read what a page like this is worth to an orthopedic practice.
What patients pay
When I reviewed the pages that rank for this comparison, most were general knee replacement cost guides quoting national price ranges, plus clinic blogs on who qualifies for same-day surgery. None of the six I could read put Medicare’s 2026 surgery center and hospital rates side by side, or explained why a Medicare patient’s share can work out differently.
Patients are choosing between three settings:
- Ambulatory surgery center (ASC). A freestanding outpatient surgical facility. Medicare says that in most cases these centers release patients within 24 hours. (Medicare.gov, ambulatory surgical centers)
- Hospital outpatient department (HOPD). Surgery in a hospital, billed as outpatient care. The patient is not formally admitted, and Medicare notes that observation services may include an overnight stay. (Medicare.gov, outpatient hospital services)
- Hospital inpatient. The patient is admitted, and for Medicare patients the stay falls under Part A.
For patients under 65, the direction of the price gap is clear.
A Blue Cross Blue Shield Association review of 2017 claims found an average price of $30,249 for an inpatient knee replacement against $19,002 in an outpatient setting. (BCBS Association, January 2019)
Comparing the two outpatient settings, a study of 47,261 commercially insured patients from 2019 to 2021 found average 90-day costs of $35,634 after surgery center knee replacement against $38,096 after a hospital outpatient one. (JAAOS, 2024)
A hospital database study, limited to one implant system, matched 9,060 outpatient cases with 9,060 inpatient ones and found outpatient care cost $2,295 less at the time of surgery and $2,679 less across 90 days of all-cause care. (Journal of Orthopaedic Surgery and Research, 2023)
Some surgery centers publish a single cash price, and these are the figures self-pay patients compare:
- Specialists’ One-Day Surgery Center, Central New York: $19,300, covering the surgeon, the center, imaging, an overnight stay if needed, anesthesia, the implant and physical therapy at the center. (SOS Joint Replacement)
- ATX Orthopedics, Austin: $21,500 at Pinnacle Surgery Center, covering the surgeon, facility, implants, anesthesiologist and 90 days of follow-up. (ATX Orthopedics)
- The Orthopaedic Surgery Center, Youngstown, Ohio: $19,361, listed without the implant cost. (The Orthopaedic Surgery Center price list)
Commercially insured patients pay coinsurance as a percentage of the negotiated facility price, so a lower facility price usually means a lower bill for them until they reach their out-of-pocket maximum.
What Medicare pays your practice
Knee replacement only recently became an outpatient operation for Medicare. CMS took it off the inpatient-only list in 2018, and the American Association of Hip and Knee Surgeons (AAHKS) rate history shows Medicare’s first surgery center payment for it in 2020, at $8,609. (Journal of Arthroplasty, 2026; AAHKS summary of the 2026 final rules)
| Surgery center (ASC) | Hospital outpatient | Hospital inpatient | |
|---|---|---|---|
| Medicare facility payment, 2026 | About $9,393 | About $13,116 | $13,025 national base (MS-DRG 470), before each hospital’s adjustments |
| What Medicare says the patient pays the facility | 20% of the approved amount, after the Part B deductible | 20%, but in most cases no more than the Part A deductible | The Part A deductible, $1,736 per benefit period |
| Patient’s facility share on national rates (my arithmetic) | About $1,879 | About $1,736 | $1,736 |
| Typical stay | Home within 24 hours in most cases | Same day, or overnight under observation | Admitted |
The payment figures come from the AAHKS summary of the 2026 Medicare final rules, which notes that actual rates vary by region and facility. Medicare’s national surgeon fee for the operation is about $1,165 in 2026, the same in any setting. The Part A deductible for 2026 is $1,736 and the Part B deductible is $283. (CMS, 2026 premiums and deductibles)
Here is how the patient’s share works out. In a surgery center, Medicare.gov says the patient pays 20% of the approved amount to both the center and the doctors. Twenty percent of $9,393 is about $1,879.
In a hospital outpatient department, 20% of $13,116 would be about $2,623. But Medicare also says that in most cases the hospital outpatient copayment can’t be more than the Part A deductible for each service. That puts the cap at $1,736 in 2026, unless the hospital is a critical access hospital, where it can be higher.
So on national figures, Medicare pays the surgery center about $3,700 less, while the patient’s own facility share is about $140 higher there. The patient also owes 20% of the surgeon fee in any setting. (AAHKS summary)
Two things change this picture. A Medigap or Medicare Advantage plan may cover or reshape these amounts, and local rates differ from the national ones, so the number a patient can rely on is a written estimate from each facility.
What the evidence patients read says
Patients asking whether outpatient knee replacement is as safe find pooled evidence that mostly says yes for selected patients, with caveats.
- A 2025 meta-analysis of 12 prospective studies covering 2,470 patients found no significant difference in readmission or complication rates between outpatient and inpatient joint replacement, and lower costs for outpatients. (BMC Musculoskeletal Disorders, 2025)
- A review of 41 studies found no significant differences in complications, readmissions or patient-reported improvement. Outpatients were younger, with a lower BMI and ASA class, and outpatient pathways cut costs by an average of $6,797. The authors flagged a moderate to high risk of bias in most studies. (Archives of Orthopaedic and Trauma Surgery, 2022)
- A 2020 meta-analysis of 212,632 knee replacements found a higher complication rate after outpatient surgery, 16.1% against 10.5%, but similar readmissions, 4.9% against 5.9%, and rated the evidence quality very low. (Journal of Orthopaedic Surgery and Research, 2020)
Between the two outpatient settings, the 2024 commercial claims study found fewer 90-day hospital admissions after surgery center cases (2.5% against 4.8%) and fewer emergency visits (8.9% against 12.7%). Healthier patients tend to be chosen for surgery centers, which explains part of that gap.
Who patients are
There is no single national rule for who qualifies for a surgery center knee replacement. Each surgeon makes the call, and the research shows who tends to be selected.
A national study of knee replacements from 2019 to 2022 found hospital patients had higher rates of nearly all comorbidities than surgery center patients. (Journal of Arthroplasty, 2026)
A meta-analysis of 3,492 patients found the most common reason a planned same-day discharge failed was a drop in blood pressure on standing, followed by inadequate physical condition, nausea, pain and urinary retention. Risk factors included ASA class III or IV, smoking and general anesthesia, while spinal anesthesia was protective. (Scientific Reports, 2024)
Questions patients ask before they book
These are the questions your page and your front desk need to answer.
- Is the patient a candidate for a surgery center, and why or why not? A good page explains how the practice selects patients for each setting.
- What is the patient’s share in each setting? A good page shows the Medicare arithmetic and offers a written estimate from both facilities.
- If the patient needs to stay longer, where do they go? A good page explains how transfers to a hospital work.
- What does the price include? A good page lists surgeon, facility, anesthesia, implant, imaging and physical therapy, which are often billed separately.
- How many knee replacements does the surgeon do in each setting? A good page states the number.
For the procedure on its own, my page on knee replacement cost shows what patients find. The related comparisons are partial vs total knee replacement cost and robotic vs traditional knee replacement cost.
What a page that wins this search includes
- Medicare’s 2026 surgery center and hospital rates side by side, with the patient’s share worked out, because none of the ranking pages I could read did that.
- A posted bundled cash price that says whether the implant is included, the way the three centers above publish theirs.
- Medicare, commercial and self-pay explained separately.
- The surgeon’s volume in each setting, and how a transfer to a hospital works.
- The safety evidence linked, including the meta-analysis that found more complications, stated neutrally.
Frequently asked questions
Is outpatient knee replacement cheaper than a hospital stay? Usually, for insurers and self-pay patients. One insurer review found an average of $19,002 outpatient against $30,249 inpatient, and published surgery center cash prices run about $19,300 to $21,500 with the implant included.
How much does Medicare pay for a knee replacement in a surgery center in 2026? About $9,393, against about $13,116 in a hospital outpatient department, before regional adjustments.
Does a Medicare patient pay less at a surgery center? Not necessarily. On national rates the patient’s 20% share of the surgery center fee is about $1,879, while the hospital outpatient copayment is in most cases capped at the $1,736 Part A deductible. Supplemental coverage changes this.
Is same-day knee replacement safe? For selected patients, two meta-analyses found no significant difference in complications or readmissions, while a third found more complications after outpatient surgery and rated the evidence very low quality.
Who is a good candidate for outpatient knee replacement? Surgeons decide case by case. Studies show surgery center patients tend to have fewer health conditions, and ASA class III or IV, smoking and general anesthesia raised the risk of a failed same-day discharge.
