ASCENSION SETON WILLIAMSON
ROUND ROCK, TX 78664 · Acute Care Hospitals
50 procedures with CMS pricing data · Source: CMS IPPS Provider Summary, FY2024
By BillRazor Research · Last updated March 27, 2026 · Methodology
Procedures Analyzed
50
With CMS pricing data
Avg Charge-to-Medicare Ratio
11.9x
Chargemaster ÷ Medicare
CMS Quality Rating
Patient experience & outcomes
Hospital Type
Acute Care Hospitals
Voluntary non-profit - Private
Above 90th Percentile
26%
Compared to TX hospitals
Understanding Your Costs
When you receive a bill from ASCENSION SETON WILLIAMSON, you are typically seeing the hospital's “chargemaster” rate — its published list price for each service. According to CMS data, ASCENSION SETON WILLIAMSON lists chargemaster rates that average 11.9x the corresponding Medicare reimbursement amount across 50 procedures with publicly available pricing data (Source: CMS IPPS Provider Summary, FY2024).
The median hospital in TX has a chargemaster-to-Medicare ratio of 6.0x, with ratios across the state ranging from 0.3x to 16.9x. At 11.9x, this facility’s average ratio is above the state median. 237 hospitals in TX report pricing data to CMS (Source: CMS IPPS Provider Summary).
The procedure with the largest gap between the listed price and Medicare reimbursement at ASCENSION SETON WILLIAMSON is RED BLOOD CELL DISORDERS WITHOUT MCC (DRG 812). The listed chargemaster rate is $84,759, while Medicare reimburses $3,860 for the same procedure — a ratio of 22.0x (Source: CMS IPPS Provider Summary, FY2024).
What does this actually mean for your bill? Chargemaster rates are rarely what patients pay. If you have insurance, your insurer has negotiated a separate rate — often 40–60% less than the listed price. If you are uninsured, you may be able to negotiate directly with the hospital or request financial assistance. The chargemaster-to-Medicare ratio is a useful reference point for understanding listed pricing, but it does not represent what most patients will owe out of pocket.
13 of 50 procedures (26%) at this facility have listed rates above the 90th percentile compared to other TX hospitals reporting the same procedure data to CMS (Source: CMS IPPS Provider Summary).
ASCENSION SETON WILLIAMSON is a voluntary non-profit - private acute care hospitals facility with a CMS quality rating of 4/5 stars. Note: CMS quality ratings measure patient outcomes and experience, not pricing. A hospital with high listed prices may provide excellent care, and pricing data alone should not be used to evaluate the quality of a healthcare provider.
Listed Chargemaster Rates vs Medicare Reimbursement — Top Procedures by Ratio
Source: CMS IPPS Provider Summary, FY2024. Chargemaster rates are list prices and may not reflect actual patient costs.
Procedure Pricing Lookup
Search for a specific procedure or DRG code to see listed chargemaster rates and Medicare reimbursement amounts.
| Procedure | DRG | Listed Charge | Medicare Reimb. | Ratio | State Position | |
|---|---|---|---|---|---|---|
| RED BLOOD CELL DISORDERS WITHOUT MCC | 812 | $84,759 | $3,860 | 22.0x | 1th | Compare your bill |
| CERVICAL SPINAL FUSION WITH CC | 472 | $316,316 | $18,500 | 17.1x | 1th | Compare your bill |
| ESOPHAGITIS, GASTROENTERITIS AND MISCELLANEOUS DIGESTIVE DISORDERS WITHOUT MCC | 392 | $70,953 | $4,656 | 15.2x | 1th | Compare your bill |
| HIP REPLACEMENT WITH PRINCIPAL DIAGNOSIS OF HIP FRACTURE WITHOUT MCC | 522 | $209,744 | $13,889 | 15.1x | 1th | Compare your bill |
| CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITH MCC | 308 | $92,069 | $6,117 | 15.1x | 1th | Compare your bill |
| COMBINED ANTERIOR AND POSTERIOR SPINAL FUSION WITHOUT CC/MCC | 455 | $500,400 | $33,619 | 14.9x | 1th | Compare your bill |
| SPINAL FUSION EXCEPT CERVICAL WITHOUT MCC | 460 | $327,446 | $22,119 | 14.8x | 1th | Compare your bill |
| GASTROINTESTINAL HEMORRHAGE WITH MCC | 377 | $159,614 | $11,125 | 14.3x | 1th | Compare your bill |
| FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITHOUT MCC | 563 | $63,464 | $4,486 | 14.2x | 1th | Compare your bill |
| KIDNEY AND URINARY TRACT INFECTIONS WITHOUT MCC | 690 | $66,158 | $4,842 | 13.7x | 1th | Compare your bill |
| MISCELLANEOUS DISORDERS OF NUTRITION, METABOLISM, FLUIDS AND ELECTROLYTES WITHOUT MCC | 641 | $59,937 | $4,404 | 13.6x | 1th | Compare your bill |
| INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH CC OR TPA IN 24 HOURS | 065 | $78,662 | $5,876 | 13.4x | 1th | Compare your bill |
| RESPIRATORY SYSTEM DIAGNOSIS WITH VENTILATOR SUPPORT <=96 HOURS | 208 | $201,152 | $15,756 | 12.8x | 1th | Compare your bill |
| SEIZURES WITHOUT MCC | 101 | $53,699 | $4,231 | 12.7x | 1th | Compare your bill |
| ACUTE MYOCARDIAL INFARCTION, DISCHARGED ALIVE WITH CC | 281 | $60,382 | $4,777 | 12.6x | 1th | Compare your bill |
| GASTROINTESTINAL HEMORRHAGE WITH CC | 378 | $64,306 | $5,136 | 12.5x | 1th | Compare your bill |
| SEPTICEMIA OR SEVERE SEPSIS WITHOUT MV >96 HOURS WITHOUT MCC | 872 | $71,469 | $5,748 | 12.4x | 1th | Compare your bill |
| CARDIAC ARRHYTHMIA AND CONDUCTION DISORDERS WITH CC | 309 | $50,503 | $4,099 | 12.3x | 1th | Compare your bill |
| MAJOR SMALL AND LARGE BOWEL PROCEDURES WITH CC | 330 | $137,376 | $11,182 | 12.3x | 1th | Compare your bill |
| INTRACRANIAL HEMORRHAGE OR CEREBRAL INFARCTION WITH MCC | 064 | $141,532 | $11,526 | 12.3x | 1th | Compare your bill |
| KIDNEY AND URINARY TRACT INFECTIONS WITH MCC | 689 | $85,086 | $7,028 | 12.1x | 1th | Compare your bill |
| MEDICAL BACK PROBLEMS WITHOUT MCC | 552 | $70,798 | $5,884 | 12.0x | 1th | Compare your bill |
| MEDICAL BACK PROBLEMS WITH MCC | 551 | $124,647 | $10,429 | 11.9x | 1th | Compare your bill |
| SEIZURES WITH MCC | 100 | $146,277 | $12,315 | 11.9x | 1th | Compare your bill |
| SYNCOPE AND COLLAPSE | 312 | $58,397 | $4,936 | 11.8x | 1th | Compare your bill |
| HIP AND FEMUR PROCEDURES EXCEPT MAJOR JOINT WITHOUT CC/MCC | 482 | $112,192 | $9,687 | 11.6x | 1th | Compare your bill |
| HEART FAILURE AND SHOCK WITH MCC | 291 | $89,059 | $7,698 | 11.6x | 1th | Compare your bill |
| HIP AND FEMUR PROCEDURES EXCEPT MAJOR JOINT WITH CC | 481 | $139,763 | $12,241 | 11.4x | 1th | Compare your bill |
| RENAL FAILURE WITH CC | 683 | $60,724 | $5,318 | 11.4x | 1th | Compare your bill |
| CRANIOTOMY AND ENDOVASCULAR INTRACRANIAL PROCEDURES WITH MCC | 025 | $318,599 | $28,607 | 11.1x | 1th | Compare your bill |
| ACUTE MYOCARDIAL INFARCTION, DISCHARGED ALIVE WITH MCC | 280 | $110,863 | $10,043 | 11.0x | 1th | Compare your bill |
| BIOPSIES OF MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH CC | 478 | $159,634 | $14,531 | 11.0x | 1th | Compare your bill |
| HIP AND FEMUR PROCEDURES EXCEPT MAJOR JOINT WITH MCC | 480 | $192,101 | $17,772 | 10.8x | 1th | Compare your bill |
| MAJOR SMALL AND LARGE BOWEL PROCEDURES WITH MCC | 329 | $252,350 | $23,413 | 10.8x | 1th | Compare your bill |
| LIMB REATTACHMENT, HIP AND FEMUR PROCEDURES FOR MULTIPLE SIGNIFICANT TRAUMA | 956 | $283,076 | $26,319 | 10.8x | 1th | Compare your bill |
| INFECTIOUS AND PARASITIC DISEASES WITH O.R. PROCEDURES WITH MCC | 853 | $301,885 | $28,047 | 10.8x | 1th | Compare your bill |
| OTHER KIDNEY AND URINARY TRACT DIAGNOSES WITH MCC | 698 | $104,376 | $9,960 | 10.5x | 1th | Compare your bill |
| SEPTICEMIA OR SEVERE SEPSIS WITHOUT MV >96 HOURS WITH MCC | 871 | $118,628 | $11,613 | 10.2x | 1th | Compare your bill |
| O.R. PROCEDURES FOR OBESITY WITHOUT CC/MCC | 621 | $84,269 | $8,318 | 10.1x | 1th | Compare your bill |
| SIMPLE PNEUMONIA AND PLEURISY WITH MCC | 193 | $74,088 | $7,534 | 9.8x | 1th | Compare your bill |
| CIRCULATORY DISORDERS EXCEPT AMI, WITH CARDIAC CATHETERIZATION WITH MCC | 286 | $124,026 | $13,099 | 9.5x | 1th | Compare your bill |
| PULMONARY EDEMA AND RESPIRATORY FAILURE | 189 | $73,163 | $7,740 | 9.4x | 1th | Compare your bill |
| TRAUMATIC STUPOR AND COMA <1 HOUR WITH CC | 086 | $71,276 | $7,565 | 9.4x | 1th | Compare your bill |
| DIABETES WITH MCC | 637 | $77,776 | $8,261 | 9.4x | 1th | Compare your bill |
| RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH MCC | 177 | $108,674 | $11,590 | 9.4x | 1th | Compare your bill |
| CELLULITIS WITHOUT MCC | 603 | $43,258 | $4,736 | 9.1x | 1th | Compare your bill |
| RENAL FAILURE WITH MCC | 682 | $83,537 | $9,175 | 9.1x | 1th | Compare your bill |
| ESOPHAGITIS, GASTROENTERITIS AND MISCELLANEOUS DIGESTIVE DISORDERS WITH MCC | 391 | $66,469 | $7,798 | 8.5x | 1th | Compare your bill |
| MISCELLANEOUS DISORDERS OF NUTRITION, METABOLISM, FLUIDS AND ELECTROLYTES WITH MCC | 640 | $62,771 | $7,523 | 8.3x | 1th | Compare your bill |
| DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITH MCC | 441 | $56,779 | $10,788 | 5.3x | 0th | Compare your bill |
Showing 50 of 50 procedures
All data from CMS IPPS Provider Summary, FY2024. Chargemaster rates are list prices and may not reflect actual patient costs.
Statewide Context
Charge-to-Medicare ratio range across TX hospitals
237 hospitals in TX report pricing data to CMS. This facility's average ratio of 11.9x places it at the upper-middle range of the state range (Source: CMS IPPS Provider Summary).
What You Can Do
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How it worksData: CMS Inpatient Prospective Payment System (IPPS) Provider Summary, FY2024. All data is publicly available under federal law (45 CFR Part 180).
Important: Listed chargemaster rates are not what most insured patients pay. Actual costs depend on your insurance plan's negotiated rates, deductibles, and coverage terms. This information is for educational purposes only and does not constitute medical, legal, or financial advice.
Frequently Asked Questions About ASCENSION SETON WILLIAMSON
How much does ASCENSION SETON WILLIAMSON charge compared to Medicare?
According to CMS IPPS data, ASCENSION SETON WILLIAMSON's listed chargemaster rates average 11.9x the Medicare reimbursement amount across 50 procedures. Chargemaster rates are list prices and are not what most insured patients pay — actual costs depend on insurance negotiations and coverage terms.
What is the most expensive procedure at ASCENSION SETON WILLIAMSON?
The procedure with the highest chargemaster-to-Medicare ratio at ASCENSION SETON WILLIAMSON is RED BLOOD CELL DISORDERS WITHOUT MCC (DRG 812), with a listed charge of $84,759 compared to Medicare reimbursement of $3,860 — a ratio of 22.0x. Source: CMS IPPS Provider Summary.
Is ASCENSION SETON WILLIAMSON expensive compared to other TX hospitals?
ASCENSION SETON WILLIAMSON's average chargemaster-to-Medicare ratio is 11.9x. Ratios vary significantly across TX hospitals. This ratio reflects listed chargemaster prices, not what patients actually pay. CMS quality ratings, which measure patient outcomes and experience, are separate from pricing data.
Where does the pricing data for ASCENSION SETON WILLIAMSON come from?
All pricing data comes from the Centers for Medicare & Medicaid Services (CMS) Inpatient Prospective Payment System (IPPS) Provider Summary, published under federal price transparency law (45 CFR Part 180). This data is publicly available and updated annually.
How can I check if my bill from ASCENSION SETON WILLIAMSON is correct?
You can upload your bill to BillRazor for a free comparison against publicly available Medicare reimbursement data. Our system analyzes every line item in 60 seconds. Research suggests 49-80% of hospital bills contain errors, including duplicate charges, incorrect procedure codes, and unbundling.
Does ASCENSION SETON WILLIAMSON in ROUND ROCK, TX accept Medicare?
ASCENSION SETON WILLIAMSON is included in the CMS IPPS Provider Summary, which covers Medicare-participating hospitals. For specific coverage questions, contact ASCENSION SETON WILLIAMSON directly or check with your insurance provider.
Data sourced from CMS IPPS Provider Summary, FY2024. All information is for educational purposes only.