Texas / Ascension Seton Williamson
CMS certification 670041 · Round Rock, TX · 2 entries in CMS's price-transparency list
Ascension Seton Williamson: charges and Medicare payments
Ascension Seton Williamson reported 1,391 Medicare inpatient stays across 52 DRGs in 2024. Across them it charged 8.83 times what it was paid — among the higher ratios in Texas, number 48 of 190 hospitals with at least 100 stays (state median 5.35×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 206 stays at an average charge of $122,155, 35% above the national average. It also billed 920 outpatient services, charging 16.24 times what Medicare paid.
- 1Medicare inpatient stays 1,391
- 2Charge ÷ paid, inpatient 8.83×
- 3Rank in TX (highest ratio = 1) 48 of 190
- 4CMS price-transparency actions 2
Inpatient stays
For the 52 DRGs that can be compared with the national average, Ascension Seton Williamson charged more than the national average in 51 (98%). 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 | 206 | $122,155 | +35% | $14,549 |
| 291 Heart Failure and Shock with MCC | 74 | $81,189 | +44% | $10,097 |
| 177 Respiratory Infections and Inflammations with MCC | 63 | $119,742 | +70% | $13,162 |
| 280 Acute Myocardial Infarction, Discharged Alive with MCC | 57 | $113,451 | +50% | $12,533 |
| 193 Simple Pneumonia and Pleurisy with MCC | 55 | $83,730 | +40% | $11,245 |
| 481 Hip and Femur Procedures except Major Joint with CC | 40 | $154,256 | +53% | $15,138 |
| 189 Pulmonary Edema and Respiratory Failure | 39 | $83,893 | +46% | $9,772 |
| 065 Intracranial Hemorrhage or Cerebral Infarction with CC or... | 34 | $77,293 | +39% | $8,337 |
| 682 Renal Failure with MCC | 33 | $106,441 | +61% | $12,159 |
| 690 Kidney and Urinary Tract Infections without MCC | 33 | $57,450 | +52% | $6,996 |
| 064 Intracranial Hemorrhage or Cerebral Infarction with MCC | 32 | $118,225 | +18% | $13,842 |
| 853 Infectious and Parasitic Diseases with O.R. Procedures with... | 31 | $305,564 | +33% | $34,214 |
| 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 30 | $60,786 | +1% | $10,193 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 29 | $48,908 | +22% | $6,850 |
| 312 Syncope and Collapse | 27 | $59,611 | +31% | $7,366 |
| 522 Hip Replacement with Principal Diagnosis of Hip Fracture... | 27 | $172,681 | +69% | $15,644 |
| 552 Medical Back Problems without MCC | 26 | $59,263 | +21% | $8,064 |
| 689 Kidney and Urinary Tract Infections with MCC | 26 | $67,211 | +31% | $9,328 |
| 698 Other Kidney and Urinary Tract Diagnoses with MCC | 26 | $107,098 | +46% | $12,574 |
| 101 Seizures without MCC | 22 | $76,541 | +57% | $7,600 |
| 683 Renal Failure with CC | 22 | $51,619 | +27% | $7,578 |
| 208 Respiratory System Diagnosis with Ventilator Support <=96... | 20 | $161,569 | +19% | $19,306 |
| 378 Gastrointestinal Hemorrhage with CC | 20 | $63,793 | +31% | $8,158 |
| 603 Cellulitis without MCC | 20 | $59,345 | +59% | $7,473 |
| 281 Acute Myocardial Infarction, Discharged Alive with CC | 19 | $75,526 | +50% | $8,478 |
| 322 Percutaneous Cardiovascular Procedures with Intraluminal... | 19 | $258,100 | +125% | $14,473 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 19 | $54,588 | +47% | $6,801 |
| 377 Gastrointestinal Hemorrhage with MCC | 18 | $103,276 | +21% | $13,494 |
| 480 Hip and Femur Procedures except Major Joint with MCC | 18 | $192,432 | +39% | $19,190 |
| 460 Spinal Fusion except Cervical without MCC | 17 | $316,950 | +86% | $36,987 |
| 194 Simple Pneumonia and Pleurisy with CC | 16 | $58,418 | +52% | $7,080 |
| 470 Major Hip and Knee Joint Replacement or Reattachment of... | 16 | $216,831 | +133% | $14,421 |
| 100 Seizures with MCC | 15 | $141,433 | +50% | $23,580 |
| 310 Cardiac Arrhythmia and Conduction Disorders without CC/MCC | 15 | $38,016 | +32% | $5,288 |
| 321 Percutaneous Cardiovascular Procedures with Intraluminal... | 15 | $308,890 | +89% | $21,079 |
| 025 Craniotomy and Endovascular Intracranial Procedures with MCC | 14 | $346,944 | +50% | $32,411 |
| 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 14 | $61,234 | 0% | $10,149 |
| 493 Lower Extremity and Humerus Procedures except Hip, Foot and... | 14 | $189,241 | +59% | $17,873 |
| 563 Fracture, Sprain, Strain and Dislocation except Femur, Hip,... | 14 | $65,675 | +54% | $7,433 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 14 | $65,957 | +34% | $9,460 |
| 023 Craniotomy with Major Device Implant or Acute Complex Cns... | 13 | $304,493 | +8% | $36,788 |
| 482 Hip and Femur Procedures except Major Joint without CC/MCC | 13 | $100,596 | +29% | $12,078 |
| 551 Medical Back Problems with MCC | 13 | $85,383 | +8% | $12,899 |
| 870 Septicemia or Severe Sepsis with MV >96 Hours | 13 | $365,135 | +13% | $41,163 |
| 066 Intracranial Hemorrhage or Cerebral Infarction without... | 12 | $48,356 | +14% | $6,215 |
| 330 Major Small and Large Bowel Procedures with CC | 12 | $178,057 | +50% | $20,841 |
| 057 Degenerative Nervous System Disorders without MCC | 11 | $88,012 | +55% | $9,641 |
| 082 Traumatic Stupor and Coma >1 Hour with MCC | 11 | $126,414 | +10% | $17,100 |
| 190 Chronic Obstructive Pulmonary Disease with MCC | 11 | $55,808 | +10% | $8,911 |
| 605 Trauma To The Skin, Subcutaneous Tissue and Breast without... | 11 | $49,929 | +8% | $7,586 |
| 637 Diabetes with MCC | 11 | $97,313 | +46% | $11,264 |
| 812 Red Blood Cell Disorders without MCC | 11 | $63,686 | +43% | $7,700 |
Outpatient services
| Service (APC) | Services | Avg charge | Medicare allowed |
|---|---|---|---|
| Comprehensive Observation Services | 384 | $35,507 | $2,459 |
| Level 5 Musculoskeletal Procedures | 114 | $193,551 | $11,833 |
| Level 1 Endovascular Procedures | 76 | $36,921 | $2,910 |
| Level 4 Musculoskeletal Procedures | 55 | $79,311 | $6,440 |
| Level 1 Laparoscopy and Related Services | 45 | $61,318 | $5,194 |
| Level 2 Excision/ Biopsy/ Incision and Drainage | 34 | $11,186 | $1,425 |
| Level 3 Excision/ Biopsy/ Incision and Drainage | 32 | $22,821 | $2,506 |
| Level 3 Vascular Procedures | 30 | $26,829 | $2,870 |
| Level 3 Electrophysiologic Procedures | 26 | $224,152 | $21,327 |
| Level 3 Musculoskeletal Procedures | 22 | $32,617 | $2,914 |
| Level 2 Laparoscopy and Related Services | 20 | $80,951 | $8,880 |
| Level 3 Endovascular Procedures | 18 | $185,598 | $9,896 |
| Level 6 Musculoskeletal Procedures | 14 | $194,835 | $16,742 |
| Level 2 Musculoskeletal Procedures | 13 | $25,809 | $1,447 |
| Level 2 Upper GI Procedures | 13 | $10,737 | $1,713 |
| Level 5 ENT Procedures | 12 | $44,755 | $5,272 |
| Level 2 Pacemaker and Similar Procedures | 12 | $94,246 | $7,648 |
Against the Texas average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), Ascension Seton Williamson charged $122,155 on average, 10% more than the Texas average of $111,133, and was paid $14,549 against a state average of $16,694. For Heart Failure and Shock with MCC (DRG 291), Ascension Seton Williamson charged $81,189 on average, 19% more than the Texas average of $67,944, and was paid $10,097 against a state average of $11,820. For Respiratory Infections and Inflammations with MCC (DRG 177), Ascension Seton Williamson charged $119,742 on average, 47% more than the Texas average of $81,715, and was paid $13,162 against a state average of $13,815. For Acute Myocardial Infarction, Discharged Alive with MCC (DRG 280), Ascension Seton Williamson charged $113,451 on average, 22% more than the Texas average of $92,713, and was paid $12,533 against a state average of $13,694. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $35,507 was 27% above the state average of $27,955. For Level 5 Musculoskeletal Procedures (outpatient APC 5115), its average charge of $193,551 was 96% above the state average of $98,771. For Level 1 Endovascular Procedures (outpatient APC 5191), its average charge of $36,921 was 2% above the state average of $36,220. For Level 4 Musculoskeletal Procedures (outpatient APC 5114), its average charge of $79,311 was 35% above the state average of $58,833.
Price-transparency record
CMS's enforcement list records these actions for a hospital named Ascension Seton Williamson in Round Rock, TX, under the federal hospital price-transparency rule (45 CFR part 180), which requires hospitals to post their standard charges online:
- Met Requirements — 2025-04-03 (CMS case 3542)
- Met Requirements — 2026-05-07 (CMS case 7729)
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.