Missouri / Mercy Hospital St Louis
CMS certification 260020 · Saint Louis, MO · 4 entries in CMS's price-transparency list
Mercy Hospital St Louis: charges and Medicare payments
Mercy Hospital St Louis reported 6,014 Medicare inpatient stays across 164 DRGs in 2024. Across them it charged 3.8 times what it was paid — mid-range in Missouri, number 33 of 59 hospitals with at least 100 stays (state median 3.85×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 413 stays at an average charge of $63,530, 30% below the national average. It also billed 5,082 outpatient services, charging 5.18 times what Medicare paid.
- 1Medicare inpatient stays 6,014
- 2Charge ÷ paid, inpatient 3.8×
- 3Rank in MO (highest ratio = 1) 33 of 59
- 4CMS price-transparency actions 4
Inpatient stays
For the 164 DRGs that can be compared with the national average, Mercy Hospital St Louis charged more than the national average in 1 (1%). Payments follow Medicare's rates, so they usually vary far less than charges.
| DRG | Stays | Avg charge | vs US | Avg paid |
|---|---|---|---|---|
| 871 Septicemia or Severe Sepsis without MV >96 Hours with MCC | 413 | $63,530 | -30% | $15,279 |
| 291 Heart Failure and Shock with MCC | 332 | $44,868 | -20% | $10,507 |
| 177 Respiratory Infections and Inflammations with MCC | 208 | $51,390 | -27% | $13,222 |
| 690 Kidney and Urinary Tract Infections without MCC | 151 | $22,633 | -40% | $6,838 |
| 885 Psychoses | 142 | $18,825 | -57% | $10,948 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 130 | $25,389 | -37% | $6,781 |
| 689 Kidney and Urinary Tract Infections with MCC | 118 | $31,020 | -40% | $9,400 |
| 552 Medical Back Problems without MCC | 111 | $30,634 | -37% | $8,095 |
| 682 Renal Failure with MCC | 95 | $47,293 | -28% | $12,051 |
| 193 Simple Pneumonia and Pleurisy with MCC | 90 | $38,411 | -36% | $10,343 |
| 603 Cellulitis without MCC | 87 | $21,383 | -43% | $7,618 |
| 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 85 | $39,229 | -35% | $10,355 |
| 683 Renal Failure with CC | 85 | $28,815 | -29% | $7,749 |
| 853 Infectious and Parasitic Diseases with O.R. Procedures with... | 83 | $146,426 | -36% | $38,309 |
| 064 Intracranial Hemorrhage or Cerebral Infarction with MCC | 80 | $73,068 | -27% | $16,241 |
| 470 Major Hip and Knee Joint Replacement or Reattachment of... | 72 | $41,748 | -55% | $14,655 |
| 065 Intracranial Hemorrhage or Cerebral Infarction with CC or... | 66 | $36,203 | -35% | $8,617 |
| 481 Hip and Femur Procedures except Major Joint with CC | 64 | $62,212 | -38% | $15,899 |
| 698 Other Kidney and Urinary Tract Diagnoses with MCC | 64 | $43,063 | -41% | $12,987 |
| 189 Pulmonary Edema and Respiratory Failure | 63 | $43,409 | -25% | $10,527 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 61 | $39,650 | -19% | $8,717 |
| 274 Percutaneous and Other Intracardiac Procedures without MCC | 59 | $87,337 | -44% | $24,388 |
| 312 Syncope and Collapse | 59 | $30,732 | -33% | $7,201 |
| 378 Gastrointestinal Hemorrhage with CC | 59 | $38,788 | -20% | $8,548 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 56 | $23,480 | -37% | $6,681 |
| 267 Endovascular Cardiac Valve Replacement and Supplement... | 53 | $137,506 | -38% | $35,923 |
| 309 Cardiac Arrhythmia and Conduction Disorders with CC | 53 | $28,462 | -21% | $6,610 |
| 286 Circulatory Disorders except AMI, with Cardiac... | 51 | $78,164 | -30% | $17,534 |
| 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 51 | $42,030 | -31% | $10,539 |
| 551 Medical Back Problems with MCC | 49 | $59,688 | -24% | $13,112 |
| 057 Degenerative Nervous System Disorders without MCC | 44 | $30,210 | -47% | $10,494 |
| 287 Circulatory Disorders except AMI, with Cardiac... | 44 | $43,328 | -32% | $9,149 |
| 330 Major Small and Large Bowel Procedures with CC | 44 | $58,474 | -51% | $17,986 |
| 377 Gastrointestinal Hemorrhage with MCC | 44 | $58,662 | -31% | $13,959 |
| 480 Hip and Femur Procedures except Major Joint with MCC | 43 | $90,858 | -35% | $22,333 |
| 308 Cardiac Arrhythmia and Conduction Disorders with MCC | 42 | $45,093 | -20% | $10,098 |
| 322 Percutaneous Cardiovascular Procedures with Intraluminal... | 40 | $73,801 | -36% | $13,915 |
| 371 Major Gastrointestinal Disorders and Peritoneal Infections... | 40 | $40,948 | -48% | $13,238 |
| 194 Simple Pneumonia and Pleurisy with CC | 39 | $25,345 | -34% | $7,506 |
| 602 Cellulitis with MCC | 38 | $33,148 | -45% | $12,327 |
| 884 Organic Disturbances and Intellectual Disability | 38 | $31,510 | -50% | $12,702 |
| 025 Craniotomy and Endovascular Intracranial Procedures with MCC | 37 | $123,927 | -46% | $33,126 |
| 178 Respiratory Infections and Inflammations with CC | 37 | $28,206 | -38% | $8,025 |
| 236 Coronary Bypass without Cardiac Catheterization without MCC | 36 | $119,399 | -43% | $30,864 |
| 305 Hypertension without MCC | 36 | $21,309 | -47% | $6,451 |
| 637 Diabetes with MCC | 36 | $40,366 | -39% | $11,358 |
| 638 Diabetes with CC | 36 | $23,554 | -43% | $7,485 |
| 493 Lower Extremity and Humerus Procedures except Hip, Foot and... | 35 | $65,183 | -45% | $18,142 |
| 812 Red Blood Cell Disorders without MCC | 35 | $35,129 | -21% | $7,882 |
| 699 Other Kidney and Urinary Tract Diagnoses with CC | 34 | $21,903 | -54% | $8,303 |
| 542 Pathological Fractures and Musculoskeletal and Connective... | 33 | $42,102 | -47% | $13,988 |
| 543 Pathological Fractures and Musculoskeletal and Connective... | 33 | $28,758 | -41% | $8,784 |
| 314 Other Circulatory System Diagnoses with MCC | 32 | $70,153 | -26% | $17,835 |
| 329 Major Small and Large Bowel Procedures with MCC | 32 | $145,144 | -32% | $33,034 |
| 563 Fracture, Sprain, Strain and Dislocation except Femur, Hip,... | 32 | $24,200 | -43% | $7,329 |
| 605 Trauma To The Skin, Subcutaneous Tissue and Breast without... | 32 | $26,456 | -43% | $7,698 |
| 069 Transient Ischemia without Thrombolytic | 31 | $34,440 | -32% | $6,809 |
| 100 Seizures with MCC | 31 | $49,945 | -47% | $15,122 |
| 202 Bronchitis and Asthma with CC/MCC | 31 | $34,033 | -26% | $8,148 |
| 208 Respiratory System Diagnosis with Ventilator Support <=96... | 31 | $102,878 | -24% | $20,343 |
Showing the 60 most frequent of 164 DRGs.
Outpatient services
Against the Missouri average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), Mercy Hospital St Louis charged $63,530 on average, 13% less than the Missouri average of $72,886, and was paid $15,279 against a state average of $15,808. For Heart Failure and Shock with MCC (DRG 291), Mercy Hospital St Louis charged $44,868 on average, 3% less than the Missouri average of $46,468, and was paid $10,507 against a state average of $10,539. For Respiratory Infections and Inflammations with MCC (DRG 177), Mercy Hospital St Louis charged $51,390 on average, 12% less than the Missouri average of $58,162, and was paid $13,222 against a state average of $13,151. For Kidney and Urinary Tract Infections without MCC (DRG 690), Mercy Hospital St Louis charged $22,633 on average, 25% less than the Missouri average of $30,270, and was paid $6,838 against a state average of $6,812. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $16,702 was 19% below the state average of $20,571. For Level 5 Musculoskeletal Procedures (outpatient APC 5115), its average charge of $31,586 was 40% below the state average of $52,262. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $6,322 was 36% below the state average of $9,865. For Level 2 Upper GI Procedures (outpatient APC 5302), its average charge of $7,720 was 21% below the state average of $9,712.
Price-transparency record
CMS's enforcement list records these actions for a hospital named Mercy Hospital St Louis in Saint Louis, MO, under the federal hospital price-transparency rule (45 CFR part 180), which requires hospitals to post their standard charges online:
- Warning Notice — 2024-02-06 (CMS case 388)
- Closure Notice — 2024-05-10 (CMS case 388)
- Warning Notice — 2025-08-25 (CMS case 6356)
- Closure Notice — 2025-11-12 (CMS case 6356)
A warning notice or corrective-action request is not a finding of wrongdoing; "Met Requirements" and closure notices record that CMS's review ended. Matched to this hospital by exact name, city and state.
Charges are the hospital's list prices averaged over its 2024 Medicare cases; payments are what those cases actually brought in. Neither is what you will pay. For a planned procedure, ask the hospital for its price estimate or, if you are uninsured or self-paying, a good-faith estimate.
Sources: CMS Medicare Inpatient Hospitals — by Provider and Service / by Geography and Service, data year 2024; CMS Medicare Outpatient Hospitals — by Provider and Service / by Geography and Service, data year 2024; CMS Hospital Price Transparency Enforcement Activities and Outcomes, July 2026. Checked 2026-10-24. Methodology.