Arizona / St. Mary's Hospital
CMS certification 030010 · Tucson, AZ · 1 entry in CMS's price-transparency list
St. Mary's Hospital: charges and Medicare payments
St. Mary's Hospital reported 892 Medicare inpatient stays across 40 DRGs in 2024. Across them it charged 10.14 times what it was paid — among the higher ratios in Arizona, number 4 of 53 hospitals with at least 100 stays (state median 5×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 140 stays at an average charge of $134,226, 49% above the national average. It also billed 654 outpatient services, charging 13.65 times what Medicare paid.
- 1Medicare inpatient stays 892
- 2Charge ÷ paid, inpatient 10.14×
- 3Rank in AZ (highest ratio = 1) 4 of 53
- 4CMS price-transparency actions 1
Inpatient stays
For the 40 DRGs that can be compared with the national average, St. Mary's Hospital charged more than the national average in 37 (93%). 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 | 140 | $134,226 | +49% | $14,997 |
| 280 Acute Myocardial Infarction, Discharged Alive with MCC | 50 | $101,097 | +33% | $12,004 |
| 291 Heart Failure and Shock with MCC | 50 | $92,187 | +64% | $9,928 |
| 281 Acute Myocardial Infarction, Discharged Alive with CC | 31 | $74,890 | +48% | $7,221 |
| 274 Percutaneous and Other Intracardiac Procedures without MCC | 29 | $238,575 | +52% | $24,642 |
| 193 Simple Pneumonia and Pleurisy with MCC | 28 | $77,881 | +30% | $10,243 |
| 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 27 | $81,797 | +36% | $10,233 |
| 267 Endovascular Cardiac Valve Replacement and Supplement... | 25 | $394,179 | +78% | $37,085 |
| 322 Percutaneous Cardiovascular Procedures with Intraluminal... | 24 | $205,535 | +79% | $14,116 |
| 853 Infectious and Parasitic Diseases with O.R. Procedures with... | 22 | $324,853 | +42% | $35,005 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 22 | $91,529 | +87% | $8,097 |
| 065 Intracranial Hemorrhage or Cerebral Infarction with CC or... | 21 | $120,959 | +117% | $8,471 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 21 | $59,333 | +48% | $6,340 |
| 266 Endovascular Cardiac Valve Replacement and Supplement... | 20 | $456,025 | +60% | $46,088 |
| 069 Transient Ischemia without Thrombolytic | 19 | $83,188 | +65% | $6,473 |
| 312 Syncope and Collapse | 19 | $65,289 | +43% | $6,972 |
| 039 Extracranial Procedures without CC/MCC | 18 | $122,014 | +91% | $9,698 |
| 682 Renal Failure with MCC | 18 | $105,638 | +60% | $13,025 |
| 177 Respiratory Infections and Inflammations with MCC | 17 | $104,550 | +48% | $12,632 |
| 189 Pulmonary Edema and Respiratory Failure | 17 | $82,699 | +44% | $9,687 |
| 698 Other Kidney and Urinary Tract Diagnoses with MCC | 17 | $69,979 | -5% | $11,532 |
| 064 Intracranial Hemorrhage or Cerebral Infarction with MCC | 16 | $90,131 | -10% | $15,178 |
| 321 Percutaneous Cardiovascular Procedures with Intraluminal... | 16 | $276,941 | +69% | $21,904 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 16 | $59,883 | +62% | $6,119 |
| 660 Kidney and Ureter Procedures for Non-Neoplasm with CC | 16 | $71,773 | +6% | $11,002 |
| 287 Circulatory Disorders except AMI, with Cardiac... | 15 | $101,737 | +59% | $8,548 |
| 377 Gastrointestinal Hemorrhage with MCC | 15 | $106,853 | +25% | $12,218 |
| 690 Kidney and Urinary Tract Infections without MCC | 15 | $60,253 | +59% | $6,516 |
| 309 Cardiac Arrhythmia and Conduction Disorders with CC | 14 | $64,222 | +78% | $6,020 |
| 070 Other Cerebrovascular Disorders with MCC | 13 | $112,522 | +48% | $13,200 |
| 163 Major Chest Procedures with MCC | 13 | $220,269 | +5% | $32,015 |
| 235 Coronary Bypass without Cardiac Catheterization with MCC | 13 | $1,283,747 | +338% | $66,264 |
| 313 Chest Pain | 13 | $83,760 | +110% | $5,877 |
| 389 Gastrointestinal Obstruction with CC | 13 | $74,483 | +91% | $9,695 |
| 194 Simple Pneumonia and Pleurisy with CC | 12 | $58,790 | +53% | $6,478 |
| 603 Cellulitis without MCC | 12 | $75,277 | +102% | $7,063 |
| 683 Renal Failure with CC | 12 | $47,338 | +16% | $7,841 |
| 269 Aortic and Heart Assist Procedures except Pulsation Balloon... | 11 | $369,317 | +92% | $32,111 |
| 308 Cardiac Arrhythmia and Conduction Disorders with MCC | 11 | $48,858 | -14% | $9,356 |
| 378 Gastrointestinal Hemorrhage with CC | 11 | $75,937 | +56% | $7,953 |
Outpatient services
| Service (APC) | Services | Avg charge | Medicare allowed |
|---|---|---|---|
| Level 1 Endovascular Procedures | 75 | $46,977 | $3,152 |
| Comprehensive Observation Services | 74 | $38,946 | $2,669 |
| Level 1 Abdominal/Peritoneal/Biliary and Related Procedures | 59 | $77,845 | $3,289 |
| Level 5 Neurostimulator and Related Procedures | 52 | $269,282 | $30,189 |
| Level 3 Endovascular Procedures | 48 | $148,979 | $10,717 |
| Level 3 Vascular Procedures | 42 | $34,225 | $3,108 |
| Level 1 Laparoscopy and Related Services | 41 | $62,515 | $5,408 |
| Level 2 Excision/ Biopsy/ Incision and Drainage | 39 | $25,220 | $1,581 |
| Level 5 Musculoskeletal Procedures | 35 | $177,371 | $12,814 |
| Level 3 Excision/ Biopsy/ Incision and Drainage | 33 | $30,898 | $2,771 |
| Level 5 Urology and Related Services | 29 | $36,812 | $5,046 |
| Level 4 Endovascular Procedures | 25 | $230,224 | $17,062 |
| Level 4 Urology and Related Services | 24 | $42,043 | $3,399 |
| Level 3 Musculoskeletal Procedures | 19 | $39,562 | $3,024 |
| Level 3 Urology and Related Services | 19 | $36,277 | $1,986 |
| Level 2 Vascular Procedures | 15 | $10,819 | $1,562 |
| Level 3 Electrophysiologic Procedures | 13 | $188,393 | $23,098 |
| Level 2 Upper GI Procedures | 12 | $33,067 | $1,693 |
Against the Arizona average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), St. Mary's Hospital charged $134,226 on average, 53% more than the Arizona average of $87,638, and was paid $14,997 against a state average of $17,455. For Acute Myocardial Infarction, Discharged Alive with MCC (DRG 280), St. Mary's Hospital charged $101,097 on average, 21% more than the Arizona average of $83,334, and was paid $12,004 against a state average of $13,989. For Heart Failure and Shock with MCC (DRG 291), St. Mary's Hospital charged $92,187 on average, 54% more than the Arizona average of $59,877, and was paid $9,928 against a state average of $11,479. For Acute Myocardial Infarction, Discharged Alive with CC (DRG 281), St. Mary's Hospital charged $74,890 on average, 26% more than the Arizona average of $59,502, and was paid $7,221 against a state average of $8,377. For Level 1 Endovascular Procedures (outpatient APC 5191), its average charge of $46,977 was 38% above the state average of $34,042. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $38,946 was 61% above the state average of $24,129. For Level 1 Abdominal/Peritoneal/Biliary and Related Procedures (outpatient APC 5341), its average charge of $77,845 was 102% above the state average of $38,454. For Level 5 Neurostimulator and Related Procedures (outpatient APC 5465), its average charge of $269,282 was 55% above the state average of $174,272.
Price-transparency record
CMS's enforcement list records these actions for a hospital named St. Mary's Hospital in Tucson, AZ, under the federal hospital price-transparency rule (45 CFR part 180), which requires hospitals to post their standard charges online:
- Met Requirements — 2025-03-12 (CMS case 3229)
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.