Hospital for Special Surgery (HSS) in New York City holds the number one ranking for orthopedics in the United States, scoring a perfect 100 out of 100 in the U.S. News & World Report 2024–2025 rankings. It also tops the Newsweek global list for orthopedic hospitals. But the “best” hospital for your knee replacement depends on more than rankings. Your surgeon’s experience, the hospital’s surgical volume, the technology available, and practical factors like location and insurance coverage all shape your outcome.
Top-Ranked Hospitals for Orthopedics
U.S. News & World Report evaluates hospitals using a weighted formula that includes 30-day survival rates (30% of the score), structural factors like staffing and technology (30%), physician reputation surveys (27.5%), patient experience scores (5%), and how often patients go home rather than to a rehab facility after surgery (7.5%). Here are the top 10 for orthopedics:
- Hospital for Special Surgery, New York City: 100/100
- NYU Langone Orthopedic Hospital, New York City: 95.9/100
- Mayo Clinic, Rochester, Minnesota: 94.4/100
- NewYork-Presbyterian Hospital, New York City: 93.0/100
- Cedars-Sinai Medical Center, Los Angeles: 90.6/100
- UCSF Medical Center, San Francisco: 86.4/100
- Stanford Hospital, Stanford, California: 81.6/100
- North Shore University Hospital at Northwell Health, Long Island, New York: 81.6/100
- Penn Presbyterian (University of Pennsylvania), Philadelphia: 80.1/100
- UCLA Medical Center and Orthopedic Hospital, Santa Monica, California: 79.6/100
Globally, the Newsweek 2025 rankings place HSS first as well, followed by Mayo Clinic in Rochester, Charité University Hospital in Berlin, Schulthess Klinik in Zurich, and Johns Hopkins Hospital in Baltimore. If you’re open to international options, those European centers are well regarded for joint surgery.
Why Surgical Volume Matters More Than You Think
One of the strongest predictors of how well your knee replacement will go is how many of these surgeries the hospital performs each year. Research published in Clinical Orthopaedics and Related Research compared outcomes across hospitals grouped by volume and found striking differences. Hospitals in the highest-volume tier (top 5%) had a 2% in-hospital complication rate, compared to 7% at the lowest-volume hospitals. At 90 days after surgery, the gap widened further: 7% complication rates at the busiest centers versus 17% at the lowest-volume ones.
Readmission rates followed the same pattern. Within 90 days of surgery, 12% of patients at the highest-volume hospitals were readmitted, compared to 21% at the lowest-volume facilities. That’s nearly double the risk. Interestingly, reoperation rates within 90 days were similar across all hospital volumes, sitting around 2%. So while going back to the operating room is equally uncommon everywhere, complications like infections, blood clots, and other issues are significantly less likely at hospitals that do these procedures routinely.
The takeaway: even if a top-10 nationally ranked hospital isn’t accessible to you, choosing a high-volume center in your region can meaningfully reduce your risk.
Robotic-Assisted Surgery and What It Offers
Many of the top-ranked hospitals now offer robotic-assisted knee replacement, and the data supporting it is substantial. A meta-analysis covering more than 2.5 million knee replacements found that robotic-assisted procedures reduced hospital stays by about 14% compared to conventional surgery. Patients who had robotic surgery were 74% more likely to be discharged directly home rather than to a rehabilitation facility, and they had a 17% lower chance of being readmitted within 90 days.
The precision advantages are well documented too. Robotic systems improve limb alignment and implant positioning, which matters because a well-aligned knee replacement moves more naturally and is less likely to wear unevenly over time. Long-term data on whether robotic surgery extends the lifespan of the implant itself is still accumulating, but the short-term recovery benefits are clear. If you’re comparing hospitals, asking whether they offer robotic-assisted knee replacement is a reasonable question, though it shouldn’t be the only factor in your decision.
What Recovery Looks Like Now
Knee replacement recovery has changed dramatically in recent years. In England, where large population-level data is available, the median hospital stay for a total knee replacement dropped from about 4.3 days in 2010 to just under 3 days in 2022. For partial knee replacement, the median fell to under 2 days. U.S. trends are similar, with many hospitals now offering outpatient or same-day knee replacement for appropriate candidates.
This shift is driven by better pain management strategies that reduce opioid use, improved anesthetic techniques, and protocols that get patients walking the same day as surgery. Some high-volume centers are actively moving toward “day-case” knee replacement, where you go home the same day. That said, same-day discharge works best for younger, healthier patients without significant other medical conditions. Most people still spend one to two nights in the hospital. The cost difference is real: 90-day total costs average about $35,600 for procedures done in ambulatory surgical centers versus $38,100 in traditional hospital outpatient departments.
How to Evaluate a Hospital Yourself
Rankings are a useful starting point, but they’re not the whole picture. Here’s what to look at when narrowing your choice:
- Joint Commission certification: The Joint Commission, in partnership with the American Academy of Orthopaedic Surgeons, offers an Advanced Certification for Total Hip and Total Knee Replacement. To earn it, a program must have treated at least 200 patients, follow evidence-based clinical guidelines, and submit quarterly performance data that meets specific quality thresholds. Hospitals with this certification have undergone on-site review and demonstrated standardized, high-quality care.
- Your surgeon’s individual volume: A skilled surgeon at a mid-ranked hospital may deliver better results than a less experienced surgeon at a top-ranked one. Ask how many knee replacements your specific surgeon performs per year. Surgeons doing more than 50 to 100 annually are generally considered high-volume.
- Technology and approach: Does the hospital offer robotic-assisted surgery? Do they use patient-specific implant sizing or 3D planning? These aren’t requirements for a good outcome, but they can improve precision.
- Discharge and rehab support: Find out whether the hospital has a structured rapid-recovery protocol, what physical therapy looks like in the first weeks, and whether they coordinate outpatient rehab after discharge.
Choosing Between a Top-Ranked Hospital and a Local One
Traveling to a nationally ranked center makes the most sense if your case is complex. If you’ve had a prior knee replacement that failed, if you have significant bone loss or deformity, or if you need a custom implant, a high-volume specialty hospital offers expertise that a community hospital may not. For straightforward primary knee replacement in an otherwise healthy person, a well-credentialed local hospital with high surgical volume and Joint Commission certification can deliver excellent results.
Consider the logistics of recovery too. You’ll need follow-up appointments in the weeks after surgery, and complications, while uncommon, are easier to manage when your surgical team is nearby. If you do travel for surgery, confirm in advance how follow-up care will be handled and whether the hospital partners with orthopedic practices closer to your home.