Wisconsin / Ascension Columbia St Mary's Hospital Milwaukee Ca
CMS certification 520051 · Milwaukee, WI
Ascension Columbia St Mary's Hospital Milwaukee Ca: charges and Medicare payments
Ascension Columbia St Mary's Hospital Milwaukee Ca reported 1,226 Medicare inpatient stays across 48 DRGs in 2024. Across them it charged 4.32 times what it was paid — among the higher ratios in Wisconsin, number 12 of 55 hospitals with at least 100 stays (state median 3.47×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 124 stays at an average charge of $77,924, 14% below the national average. It also billed 1,944 outpatient services, charging 8.09 times what Medicare paid.
- 1Medicare inpatient stays 1,226
- 2Charge ÷ paid, inpatient 4.32×
- 3Rank in WI (highest ratio = 1) 12 of 55
- 4CMS price-transparency actions 0
Inpatient stays
For the 48 DRGs that can be compared with the national average, Ascension Columbia St Mary's Hospital Milwaukee Ca charged more than the national average in 5 (10%). 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 | 124 | $77,924 | -14% | $16,640 |
| 291 Heart Failure and Shock with MCC | 84 | $44,422 | -21% | $11,555 |
| 193 Simple Pneumonia and Pleurisy with MCC | 61 | $47,754 | -20% | $11,773 |
| 177 Respiratory Infections and Inflammations with MCC | 56 | $50,051 | -29% | $14,000 |
| 280 Acute Myocardial Infarction, Discharged Alive with MCC | 46 | $52,998 | -30% | $13,950 |
| 885 Psychoses | 44 | $33,542 | -24% | $11,757 |
| 189 Pulmonary Edema and Respiratory Failure | 41 | $54,012 | -6% | $11,111 |
| 274 Percutaneous and Other Intracardiac Procedures without MCC | 37 | $122,056 | -22% | $25,851 |
| 690 Kidney and Urinary Tract Infections without MCC | 33 | $31,588 | -16% | $7,383 |
| 309 Cardiac Arrhythmia and Conduction Disorders with CC | 31 | $31,363 | -13% | $7,024 |
| 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 30 | $46,241 | -23% | $11,200 |
| 683 Renal Failure with CC | 30 | $31,749 | -22% | $8,029 |
| 064 Intracranial Hemorrhage or Cerebral Infarction with MCC | 29 | $81,858 | -18% | $17,082 |
| 603 Cellulitis without MCC | 29 | $27,319 | -27% | $7,949 |
| 853 Infectious and Parasitic Diseases with O.R. Procedures with... | 27 | $189,817 | -17% | $40,824 |
| 065 Intracranial Hemorrhage or Cerebral Infarction with CC or... | 24 | $46,397 | -17% | $9,301 |
| 266 Endovascular Cardiac Valve Replacement and Supplement... | 23 | $236,918 | -17% | $52,716 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 23 | $34,642 | -14% | $7,437 |
| 682 Renal Failure with MCC | 23 | $51,295 | -22% | $13,045 |
| 689 Kidney and Urinary Tract Infections with MCC | 23 | $42,564 | -17% | $10,453 |
| 377 Gastrointestinal Hemorrhage with MCC | 22 | $82,852 | -3% | $14,526 |
| 308 Cardiac Arrhythmia and Conduction Disorders with MCC | 21 | $38,541 | -32% | $11,173 |
| 194 Simple Pneumonia and Pleurisy with CC | 18 | $32,854 | -14% | $7,638 |
| 310 Cardiac Arrhythmia and Conduction Disorders without CC/MCC | 18 | $18,570 | -35% | $5,987 |
| 378 Gastrointestinal Hemorrhage with CC | 18 | $30,356 | -37% | $9,444 |
| 481 Hip and Femur Procedures except Major Joint with CC | 18 | $80,269 | -20% | $17,197 |
| 322 Percutaneous Cardiovascular Procedures with Intraluminal... | 17 | $115,142 | +1% | $15,097 |
| 552 Medical Back Problems without MCC | 17 | $37,618 | -23% | $8,769 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 16 | $22,068 | -40% | $7,205 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 16 | $30,714 | -37% | $7,963 |
| 389 Gastrointestinal Obstruction with CC | 15 | $41,526 | +7% | $7,692 |
| 637 Diabetes with MCC | 15 | $69,290 | +4% | $13,055 |
| 025 Craniotomy and Endovascular Intracranial Procedures with MCC | 14 | $169,500 | -27% | $40,397 |
| 082 Traumatic Stupor and Coma >1 Hour with MCC | 14 | $68,199 | -41% | $19,268 |
| 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 14 | $39,238 | -36% | $11,176 |
| 069 Transient Ischemia without Thrombolytic | 13 | $34,262 | -32% | $7,521 |
| 305 Hypertension without MCC | 13 | $30,382 | -24% | $7,215 |
| 312 Syncope and Collapse | 13 | $29,368 | -36% | $7,878 |
| 812 Red Blood Cell Disorders without MCC | 13 | $34,094 | -23% | $8,154 |
| 330 Major Small and Large Bowel Procedures with CC | 12 | $122,226 | +3% | $22,921 |
| 394 Other Digestive System Diagnoses with CC | 12 | $38,129 | -19% | $8,641 |
| 522 Hip Replacement with Principal Diagnosis of Hip Fracture... | 12 | $69,487 | -32% | $17,433 |
| 811 Red Blood Cell Disorders with MCC | 12 | $48,610 | -29% | $12,103 |
| 178 Respiratory Infections and Inflammations with CC | 11 | $43,085 | -5% | $9,141 |
| 236 Coronary Bypass without Cardiac Catheterization without MCC | 11 | $131,179 | -38% | $38,586 |
| 281 Acute Myocardial Infarction, Discharged Alive with CC | 11 | $54,103 | +7% | $8,247 |
| 536 Fractures of Hip and Pelvis without MCC | 11 | $20,756 | -45% | $6,845 |
| 602 Cellulitis with MCC | 11 | $54,341 | -10% | $12,098 |
Outpatient services
Against the Wisconsin average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), Ascension Columbia St Mary's Hospital Milwaukee Ca charged $77,924 on average, 31% more than the Wisconsin average of $59,481, and was paid $16,640 against a state average of $16,719. For Heart Failure and Shock with MCC (DRG 291), Ascension Columbia St Mary's Hospital Milwaukee Ca charged $44,422 on average, 12% more than the Wisconsin average of $39,564, and was paid $11,555 against a state average of $10,862. For Simple Pneumonia and Pleurisy with MCC (DRG 193), Ascension Columbia St Mary's Hospital Milwaukee Ca charged $47,754 on average, 19% more than the Wisconsin average of $40,070, and was paid $11,773 against a state average of $11,231. For Respiratory Infections and Inflammations with MCC (DRG 177), Ascension Columbia St Mary's Hospital Milwaukee Ca charged $50,051 on average, 4% less than the Wisconsin average of $52,035, and was paid $14,000 against a state average of $14,345. For Level 1 Intraocular Procedures (outpatient APC 5491), its average charge of $11,900 was 4% above the state average of $11,485. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $11,706 was 31% above the state average of $8,908. For Level 2 Upper GI Procedures (outpatient APC 5302), its average charge of $13,114 was 13% above the state average of $11,645. For Level 3 Urology and Related Services (outpatient APC 5373), its average charge of $15,430 was 78% above the state average of $8,646.
Price-transparency record
No action in CMS's price-transparency enforcement list (July 2026) matches this hospital's exact name, city and state. That can mean CMS has not reviewed it, or that it is listed under a different name.
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.