Price AtlasInteractive atlas · All states · techysurgeon.comSt Mary's Medical Center: what a joint replacement costs
San Francisco, CA 94117 · CMS Certification Number 050457. What Medicare pays this hospital for knee, hip and shoulder replacement, what it lists, how it compares, and what a surgery center nearby is paid.
Medicare prices at St Mary's Medical Center
| Operation | Inpatient avg total payment Medicare + patient share | List price | List ÷ total | Outpatient Medicare allowed |
|---|---|---|---|---|
| Hip or knee replacement | $26,469 | $132,780 | 5.0× | $18,419 |
| Shoulder replacement | — | — | — | — |
Commercial negotiated rates (beta)
| MS-DRG 470 | Median across insurers | × Medicare total payment | Lowest–highest insurer | Insurers |
|---|---|---|---|---|
| Hip or knee replacement | $31,888 | 1.2× | $27,476–$42,980 | 4 |
| Insurer | Median negotiated, MS-DRG 470 | × Medicare total payment | Plans |
|---|---|---|---|
| Blue Shield of California | $42,980 | 1.6× | 1 |
| Healthnet | $35,421 | 1.3× | 1 |
| Cigna | $28,355 | 1.1× | 1 |
| UnitedHealthcare | $27,476 | 1.0× | 1 |
From the hospital's price-transparency file (2026-04-01); commercial plans, dollar-amount contracts only.
From the hospital's price-transparency file (2026-04-01); commercial plans, dollar-amount contracts only.
Quality
Complications after hip or knee replacement: 3.2% (no different from the national rate). Readmissions: 4.5%. Overall Care Compare rating: 4 of 5 stars. Nonprofit · Acute · 275 beds
California has no certificate-of-need law.
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Questions
How much does Medicare pay St Mary's Medical Center for a knee or hip replacement?
In 2024 the average total payment to St Mary's Medical Center for an inpatient hip or knee replacement stay was $26,469 (MS-DRG 470, 46 Medicare stays; Medicare's payment plus the patient's deductible and coinsurance), and the Medicare allowed amount averaged $18,419 per outpatient case (APC 5115, 49 cases).
What is St Mary's Medical Center's list price for a joint replacement?
The hospital's average list (chargemaster) price for an inpatient hip or knee replacement was $132,780, 5.0× the average total payment for a Medicare stay. Almost nobody pays the list price; it matters for uninsured bills and percent-of-charge contracts.
Is a knee replacement cheaper at a surgery center near St Mary's Medical Center?
Yes for Medicare facility payments. Post Street Surgery Center, LLC, an orthopedic surgery center 1.2 mi away, is paid about $13,132 by Medicare for a knee replacement (CPT 27447), $13,337 less than an inpatient stay at St Mary's Medical Center. Not every patient is a surgery-center candidate.
How does St Mary's Medical Center compare with other California hospitals?
St Mary's Medical Center's average total payment per Medicare stay is higher than 90% of the 119 California hospitals that report inpatient hip or knee replacement.
What do commercial insurers pay St Mary's Medical Center for a hip or knee replacement?
From the hospital's own price-transparency file, commercial plans' negotiated rates for MS-DRG 470 have a median of $31,888 across 4 insurers, ranging from $27,476 to $42,980.