Missouri / Mercy Hospital South
CMS certification 260077 · Saint Louis, MO · 3 entries in CMS's price-transparency list
Mercy Hospital South: charges and Medicare payments
Mercy Hospital South reported 5,389 Medicare inpatient stays across 138 DRGs in 2024. Across them it charged 3.36 times what it was paid — among the lower ratios in Missouri, number 41 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: 515 stays at an average charge of $49,785, 45% below the national average. It also billed 3,140 outpatient services, charging 4.46 times what Medicare paid.
- 1Medicare inpatient stays 5,389
- 2Charge ÷ paid, inpatient 3.36×
- 3Rank in MO (highest ratio = 1) 41 of 59
- 4CMS price-transparency actions 3
Inpatient stays
For the 138 DRGs that can be compared with the national average, Mercy Hospital South 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 | 515 | $49,785 | -45% | $13,662 |
| 291 Heart Failure and Shock with MCC | 266 | $36,376 | -35% | $9,207 |
| 885 Psychoses | 240 | $19,958 | -55% | $9,777 |
| 177 Respiratory Infections and Inflammations with MCC | 167 | $39,208 | -44% | $11,610 |
| 689 Kidney and Urinary Tract Infections with MCC | 115 | $25,424 | -50% | $8,333 |
| 193 Simple Pneumonia and Pleurisy with MCC | 106 | $31,343 | -48% | $9,355 |
| 853 Infectious and Parasitic Diseases with O.R. Procedures with... | 98 | $104,336 | -54% | $33,464 |
| 690 Kidney and Urinary Tract Infections without MCC | 94 | $17,606 | -53% | $5,951 |
| 189 Pulmonary Edema and Respiratory Failure | 92 | $30,431 | -47% | $8,837 |
| 064 Intracranial Hemorrhage or Cerebral Infarction with MCC | 87 | $52,398 | -48% | $14,204 |
| 552 Medical Back Problems without MCC | 87 | $21,857 | -55% | $7,112 |
| 682 Renal Failure with MCC | 87 | $33,630 | -49% | $10,308 |
| 065 Intracranial Hemorrhage or Cerebral Infarction with CC or... | 84 | $32,689 | -41% | $7,769 |
| 378 Gastrointestinal Hemorrhage with CC | 82 | $25,537 | -47% | $7,225 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 80 | $28,542 | -42% | $7,680 |
| 377 Gastrointestinal Hemorrhage with MCC | 79 | $44,901 | -47% | $12,638 |
| 683 Renal Failure with CC | 72 | $20,520 | -50% | $6,631 |
| 309 Cardiac Arrhythmia and Conduction Disorders with CC | 70 | $20,386 | -44% | $5,763 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 70 | $19,000 | -53% | $5,866 |
| 603 Cellulitis without MCC | 68 | $17,631 | -53% | $6,578 |
| 312 Syncope and Collapse | 66 | $24,764 | -46% | $6,445 |
| 274 Percutaneous and Other Intracardiac Procedures without MCC | 60 | $76,238 | -51% | $21,856 |
| 481 Hip and Femur Procedures except Major Joint with CC | 60 | $38,378 | -62% | $14,155 |
| 698 Other Kidney and Urinary Tract Diagnoses with MCC | 55 | $40,227 | -45% | $11,399 |
| 522 Hip Replacement with Principal Diagnosis of Hip Fracture... | 53 | $39,809 | -61% | $14,867 |
| 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 49 | $24,003 | -60% | $9,422 |
| 178 Respiratory Infections and Inflammations with CC | 48 | $24,584 | -46% | $7,130 |
| 280 Acute Myocardial Infarction, Discharged Alive with MCC | 48 | $43,573 | -43% | $10,987 |
| 057 Degenerative Nervous System Disorders without MCC | 47 | $23,034 | -59% | $9,409 |
| 308 Cardiac Arrhythmia and Conduction Disorders with MCC | 47 | $29,197 | -48% | $8,874 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 45 | $18,958 | -49% | $5,818 |
| 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 41 | $25,485 | -58% | $9,549 |
| 543 Pathological Fractures and Musculoskeletal and Connective... | 41 | $18,856 | -62% | $7,894 |
| 480 Hip and Femur Procedures except Major Joint with MCC | 38 | $63,753 | -54% | $19,352 |
| 660 Kidney and Ureter Procedures for Non-Neoplasm with CC | 38 | $24,777 | -63% | $9,759 |
| 100 Seizures with MCC | 37 | $68,647 | -27% | $15,528 |
| 322 Percutaneous Cardiovascular Procedures with Intraluminal... | 37 | $74,865 | -35% | $12,789 |
| 521 Hip Replacement with Principal Diagnosis of Hip Fracture... | 37 | $67,683 | -50% | $20,353 |
| 602 Cellulitis with MCC | 37 | $34,770 | -42% | $10,189 |
| 884 Organic Disturbances and Intellectual Disability | 37 | $26,289 | -58% | $11,321 |
| 287 Circulatory Disorders except AMI, with Cardiac... | 34 | $35,666 | -44% | $8,013 |
| 394 Other Digestive System Diagnoses with CC | 34 | $18,877 | -60% | $7,070 |
| 082 Traumatic Stupor and Coma >1 Hour with MCC | 33 | $57,675 | -50% | $15,728 |
| 056 Degenerative Nervous System Disorders with MCC | 32 | $30,492 | -68% | $16,149 |
| 069 Transient Ischemia without Thrombolytic | 32 | $23,347 | -54% | $5,943 |
| 372 Major Gastrointestinal Disorders and Peritoneal Infections... | 32 | $24,799 | -48% | $7,811 |
| 605 Trauma To The Skin, Subcutaneous Tissue and Breast without... | 32 | $23,729 | -49% | $7,540 |
| 267 Endovascular Cardiac Valve Replacement and Supplement... | 31 | $107,329 | -51% | $32,551 |
| 637 Diabetes with MCC | 31 | $27,734 | -58% | $10,294 |
| 299 Peripheral Vascular Disorders with MCC | 30 | $33,994 | -55% | $10,994 |
| 321 Percutaneous Cardiovascular Procedures with Intraluminal... | 29 | $106,552 | -35% | $20,821 |
| 389 Gastrointestinal Obstruction with CC | 29 | $17,814 | -54% | $6,104 |
| 418 Laparoscopic Cholecystectomy without C.D.E. with CC | 29 | $37,904 | -59% | $12,074 |
| 101 Seizures without MCC | 28 | $26,940 | -45% | $6,743 |
| 393 Other Digestive System Diagnoses with MCC | 28 | $27,197 | -65% | $11,420 |
| 699 Other Kidney and Urinary Tract Diagnoses with CC | 28 | $17,409 | -63% | $7,872 |
| 190 Chronic Obstructive Pulmonary Disease with MCC | 27 | $31,374 | -38% | $8,361 |
| 202 Bronchitis and Asthma with CC/MCC | 27 | $23,275 | -50% | $7,003 |
| 563 Fracture, Sprain, Strain and Dislocation except Femur, Hip,... | 27 | $15,736 | -63% | $6,481 |
| 917 Poisoning and Toxic Effects of Drugs with MCC | 27 | $43,589 | -42% | $10,950 |
Showing the 60 most frequent of 138 DRGs.
Outpatient services
Against the Missouri average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), Mercy Hospital South charged $49,785 on average, 32% less than the Missouri average of $72,886, and was paid $13,662 against a state average of $15,808. For Heart Failure and Shock with MCC (DRG 291), Mercy Hospital South charged $36,376 on average, 22% less than the Missouri average of $46,468, and was paid $9,207 against a state average of $10,539. For Psychoses (DRG 885), Mercy Hospital South charged $19,958 on average, 35% less than the Missouri average of $30,825, and was paid $9,777 against a state average of $12,977. For Respiratory Infections and Inflammations with MCC (DRG 177), Mercy Hospital South charged $39,208 on average, 33% less than the Missouri average of $58,162, and was paid $11,610 against a state average of $13,151. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $14,134 was 31% below the state average of $20,571. For Level 2 Upper GI Procedures (outpatient APC 5302), its average charge of $6,066 was 38% below the state average of $9,712. For Level 1 Nerve Procedures (outpatient APC 5431), its average charge of $8,056 was 24% below the state average of $10,541. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $7,211 was 27% below the state average of $9,865.
Price-transparency record
CMS's enforcement list records these actions for a hospital named Mercy Hospital South in Saint Louis, MO, under the federal hospital price-transparency rule (45 CFR part 180), which requires hospitals to post their standard charges online:
- Met Requirements — 2025-04-16 (CMS case 3884)
- Warning Notice — 2026-06-03 (CMS case 7868)
- Closure Notice — 2026-07-09 (CMS case 7868)
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.