Illinois / SSM Health St Mary's Hospital -Centralia
CMS certification 140034 · Centralia, IL
SSM Health St Mary's Hospital -Centralia: charges and Medicare payments
SSM Health St Mary's Hospital -Centralia reported 712 Medicare inpatient stays across 21 DRGs in 2024. Across them it charged 2.66 times what it was paid — among the lower ratios in Illinois, number 91 of 106 hospitals with at least 100 stays (state median 4.06×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 181 stays at an average charge of $38,789, 57% below the national average. It also billed 322 outpatient services, charging 8.53 times what Medicare paid.
- 1Medicare inpatient stays 712
- 2Charge ÷ paid, inpatient 2.66×
- 3Rank in IL (highest ratio = 1) 91 of 106
- 4CMS price-transparency actions 0
Inpatient stays
For the 21 DRGs that can be compared with the national average, SSM Health St Mary's Hospital -Centralia charged more than the national average in 0 (0%). 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 | 181 | $38,789 | -57% | $15,798 |
| 193 Simple Pneumonia and Pleurisy with MCC | 68 | $26,585 | -56% | $10,887 |
| 291 Heart Failure and Shock with MCC | 53 | $29,434 | -48% | $10,636 |
| 689 Kidney and Urinary Tract Infections with MCC | 42 | $25,783 | -50% | $9,349 |
| 177 Respiratory Infections and Inflammations with MCC | 39 | $30,326 | -57% | $13,383 |
| 189 Pulmonary Edema and Respiratory Failure | 38 | $28,922 | -50% | $9,905 |
| 603 Cellulitis without MCC | 35 | $17,204 | -54% | $7,144 |
| 690 Kidney and Urinary Tract Infections without MCC | 34 | $22,296 | -41% | $6,682 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 29 | $22,265 | -45% | $6,646 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 29 | $30,139 | -39% | $8,245 |
| 683 Renal Failure with CC | 21 | $24,990 | -39% | $7,238 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 20 | $14,457 | -61% | $6,196 |
| 682 Renal Failure with MCC | 18 | $28,840 | -56% | $11,868 |
| 194 Simple Pneumonia and Pleurisy with CC | 16 | $27,309 | -29% | $6,669 |
| 698 Other Kidney and Urinary Tract Diagnoses with MCC | 15 | $32,529 | -56% | $13,289 |
| 100 Seizures with MCC | 14 | $27,196 | -71% | $15,790 |
| 309 Cardiac Arrhythmia and Conduction Disorders with CC | 14 | $24,744 | -31% | $5,993 |
| 312 Syncope and Collapse | 12 | $28,048 | -38% | $7,005 |
| 638 Diabetes with CC | 12 | $21,898 | -47% | $7,257 |
| 178 Respiratory Infections and Inflammations with CC | 11 | $25,219 | -44% | $8,088 |
| 308 Cardiac Arrhythmia and Conduction Disorders with MCC | 11 | $29,113 | -49% | $9,452 |
Outpatient services
| Service (APC) | Services | Avg charge | Medicare allowed |
|---|---|---|---|
| Comprehensive Observation Services | 160 | $15,791 | $2,479 |
| Level 4 Musculoskeletal Procedures | 39 | $46,936 | $6,341 |
| Level 3 Musculoskeletal Procedures | 37 | $22,585 | $2,927 |
| Level 2 Excision/ Biopsy/ Incision and Drainage | 32 | $10,626 | $1,461 |
| Level 3 Excision/ Biopsy/ Incision and Drainage | 26 | $19,017 | $2,525 |
| Level 2 Neurostimulator and Related Procedures | 15 | $26,321 | $5,899 |
| Level 1 Laparoscopy and Related Services | 13 | $37,462 | $5,332 |
Against the Illinois average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), SSM Health St Mary's Hospital -Centralia charged $38,789 on average, 48% less than the Illinois average of $73,987, and was paid $15,798 against a state average of $17,651. For Simple Pneumonia and Pleurisy with MCC (DRG 193), SSM Health St Mary's Hospital -Centralia charged $26,585 on average, 46% less than the Illinois average of $49,081, and was paid $10,887 against a state average of $11,857. For Heart Failure and Shock with MCC (DRG 291), SSM Health St Mary's Hospital -Centralia charged $29,434 on average, 36% less than the Illinois average of $46,293, and was paid $10,636 against a state average of $11,813. For Kidney and Urinary Tract Infections with MCC (DRG 689), SSM Health St Mary's Hospital -Centralia charged $25,783 on average, 36% less than the Illinois average of $40,075, and was paid $9,349 against a state average of $10,117. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $15,791 was 27% below the state average of $21,498. For Level 4 Musculoskeletal Procedures (outpatient APC 5114), its average charge of $46,936 was 4% above the state average of $45,012. For Level 3 Musculoskeletal Procedures (outpatient APC 5113), its average charge of $22,585 was 4% below the state average of $23,572. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $10,626 was 10% below the state average of $11,818.
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.