Price AtlasInteractive atlas · All states · techysurgeon.comMercy Hospital South: what a joint replacement costs
Saint Louis, MO 63128 · CMS Certification Number 260077. 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 Mercy Hospital South
| Operation | Inpatient avg total payment Medicare + patient share | List price | List ÷ total | Outpatient Medicare allowed |
|---|---|---|---|---|
| Hip or knee replacement | $14,296 | $36,756 | 2.6× | $11,332 |
| Shoulder replacement | — | — | — | $16,551 |
| Hip replacement after a fracture (DRG 522) | $14,867 | $39,809 | 2.7× | — |
Commercial negotiated rates (beta)
| MS-DRG 470 | Median across insurers | × Medicare total payment | Lowest–highest insurer | Insurers |
|---|---|---|---|---|
| Hip or knee replacement | $9,857 | 0.7× | — | 1 |
| Insurer | Median negotiated, MS-DRG 470 | × Medicare total payment | Plans |
|---|---|---|---|
| Humana | $9,857 | 0.7× | 1 |
From the hospital's price-transparency file (2026-06-10); commercial plans, dollar-amount contracts only.
From the hospital's price-transparency file (2026-06-10); commercial plans, dollar-amount contracts only.
Quality
Complications after hip or knee replacement: 3.7% (no different from the national rate). Readmissions: 6%. Overall Care Compare rating: 2 of 5 stars. Nonprofit · Acute · 767 beds
Missouri has a certificate-of-need program that does not cover surgery centers.
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Questions
How much does Medicare pay Mercy Hospital South for a knee or hip replacement?
In 2024 the average total payment to Mercy Hospital South for an inpatient hip or knee replacement stay was $14,296 (MS-DRG 470, 24 Medicare stays; Medicare's payment plus the patient's deductible and coinsurance), and the Medicare allowed amount averaged $11,332 per outpatient case (APC 5115, 165 cases).
What is Mercy Hospital South's list price for a joint replacement?
The hospital's average list (chargemaster) price for an inpatient hip or knee replacement was $36,756, 2.6× 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 Mercy Hospital South?
Yes for Medicare facility payments. Mercy Outpatient Surgery Center - West Bend, an orthopedic surgery center same ZIP away, is paid about $8,800 by Medicare for a knee replacement (CPT 27447), $5,496 less than an inpatient stay at Mercy Hospital South. Not every patient is a surgery-center candidate.
How does Mercy Hospital South compare with other Missouri hospitals?
Mercy Hospital South's average total payment per Medicare stay is higher than 53% of the 32 Missouri hospitals that report inpatient hip or knee replacement.
What do commercial insurers pay Mercy Hospital South 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 $9,857 across 1 insurer.