Alta Bates Summit Medical Center: charges and Medicare payments

Alta Bates Summit Medical Center reported 3,163 Medicare inpatient stays across 90 DRGs in 2024. Across them it charged 4.5 times what it was paid — mid-range in California, number 161 of 247 hospitals with at least 100 stays (state median 5.18×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 605 stays at an average charge of $96,808, 7% above the national average. It also billed 1,984 outpatient services, charging 6.79 times what Medicare paid.

1Medicare inpatient stays 3,163
2Charge ÷ paid, inpatient 4.5×
3Rank in CA (highest ratio = 1) 161 of 247
4CMS price-transparency actions 0

Average charge per stay at Alta Bates Summit Medical Center, its 10 most frequent DRGs, bars to scale. Source: CMS DY2024.

Inpatient stays

For the 90 DRGs that can be compared with the national average, Alta Bates Summit Medical Center charged more than the national average in 63 (70%). 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	605	$96,808	+7%	$23,021
291 Heart Failure and Shock with MCC	179	$76,669	+36%	$15,026
872 Septicemia or Severe Sepsis without MV >96 Hours without MCC	103	$54,653	+11%	$13,212
280 Acute Myocardial Infarction, Discharged Alive with MCC	92	$90,248	+19%	$18,615
640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and...	73	$64,709	+7%	$14,729
470 Major Hip and Knee Joint Replacement or Reattachment of...	68	$128,716	+38%	$25,441
189 Pulmonary Edema and Respiratory Failure	63	$76,078	+32%	$14,505
853 Infectious and Parasitic Diseases with O.R. Procedures with...	63	$212,494	-7%	$52,915
065 Intracranial Hemorrhage or Cerebral Infarction with CC or...	62	$68,994	+24%	$11,958
698 Other Kidney and Urinary Tract Diagnoses with MCC	62	$67,793	-8%	$18,516
177 Respiratory Infections and Inflammations with MCC	61	$81,266	+15%	$18,259
683 Renal Failure with CC	56	$56,989	+40%	$10,533
267 Endovascular Cardiac Valve Replacement and Supplement...	52	$217,329	-2%	$57,433
274 Percutaneous and Other Intracardiac Procedures without MCC	52	$182,842	+17%	$37,924
064 Intracranial Hemorrhage or Cerebral Infarction with MCC	46	$106,853	+7%	$22,170
193 Simple Pneumonia and Pleurisy with MCC	46	$79,198	+33%	$16,360
682 Renal Failure with MCC	46	$69,464	+5%	$16,992
281 Acute Myocardial Infarction, Discharged Alive with CC	43	$58,887	+17%	$10,815
812 Red Blood Cell Disorders without MCC	43	$57,523	+30%	$10,596
308 Cardiac Arrhythmia and Conduction Disorders with MCC	42	$66,977	+18%	$14,657
312 Syncope and Collapse	42	$49,118	+8%	$10,258
322 Percutaneous Cardiovascular Procedures with Intraluminal...	41	$150,394	+31%	$22,750
309 Cardiac Arrhythmia and Conduction Disorders with CC	40	$43,535	+21%	$9,474
266 Endovascular Cardiac Valve Replacement and Supplement...	38	$340,381	+19%	$75,772
378 Gastrointestinal Hemorrhage with CC	34	$50,091	+3%	$11,661
377 Gastrointestinal Hemorrhage with MCC	33	$75,500	-12%	$19,315
641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and...	33	$53,536	+44%	$9,069
321 Percutaneous Cardiovascular Procedures with Intraluminal...	32	$232,267	+42%	$33,520
314 Other Circulatory System Diagnoses with MCC	30	$80,907	-15%	$22,382
811 Red Blood Cell Disorders with MCC	30	$66,161	-3%	$17,560
870 Septicemia or Severe Sepsis with MV >96 Hours	27	$391,524	+21%	$90,192
243 Permanent Cardiac Pacemaker Implant with CC	25	$117,292	+6%	$28,400
689 Kidney and Urinary Tract Infections with MCC	25	$49,340	-4%	$12,841
552 Medical Back Problems without MCC	24	$54,117	+11%	$10,688
229 Other Cardiothoracic Procedures without MCC	22	$217,495	+32%	$39,434
233 Coronary Bypass with Cardiac Catheterization or Open...	22	$354,867	-8%	$77,012
310 Cardiac Arrhythmia and Conduction Disorders without CC/MCC	21	$40,345	+40%	$7,199
330 Major Small and Large Bowel Procedures with CC	21	$147,127	+24%	$26,022
287 Circulatory Disorders except AMI, with Cardiac...	20	$75,694	+18%	$14,834
481 Hip and Femur Procedures except Major Joint with CC	20	$101,262	+1%	$26,107
981 Extensive O.R. Procedures Unrelated To Principal Diagnosis...	20	$253,012	+17%	$57,671
069 Transient Ischemia without Thrombolytic	19	$60,407	+20%	$9,394
252 Other Vascular Procedures with MCC	19	$170,983	0%	$40,937
270 Other Major Cardiovascular Procedures with MCC	19	$286,130	+10%	$65,029
091 Other Disorders of Nervous System with MCC	18	$56,322	-32%	$19,184
190 Chronic Obstructive Pulmonary Disease with MCC	18	$56,990	+13%	$12,225
854 Infectious and Parasitic Diseases with O.R. Procedures with...	18	$112,709	+15%	$23,300
062 Ischemic Stroke, Precerebral Occlusion or Transient Ischemia...	17	$111,568	+10%	$21,140
235 Coronary Bypass without Cardiac Catheterization with MCC	17	$328,903	+12%	$73,797
244 Permanent Cardiac Pacemaker Implant without CC/MCC	17	$97,861	+5%	$24,312
699 Other Kidney and Urinary Tract Diagnoses with CC	17	$45,166	-5%	$11,601
813 Coagulation Disorders	17	$60,534	-24%	$17,917
057 Degenerative Nervous System Disorders without MCC	16	$56,209	-1%	$14,455
175 Pulmonary Embolism with MCC or Acute Cor Pulmonale	16	$84,630	+30%	$15,934
180 Respiratory Neoplasms with MCC	16	$81,605	-7%	$20,004
286 Circulatory Disorders except AMI, with Cardiac...	16	$189,417	+69%	$28,355
522 Hip Replacement with Principal Diagnosis of Hip Fracture...	16	$124,767	+22%	$23,583
621 O.R. Procedures for Obesity without CC/MCC	16	$111,064	+48%	$17,662
092 Other Disorders of Nervous System with CC	15	$55,395	+7%	$11,746
101 Seizures without MCC	15	$58,913	+21%	$10,699

Showing the 60 most frequent of 90 DRGs.

Outpatient services

Service (APC)	Services	Avg charge	Medicare allowed
Level 2 Excision/ Biopsy/ Incision and Drainage	282	$9,124	$2,239
Comprehensive Observation Services	254	$32,967	$3,801
Level 1 Laparoscopy and Related Services	128	$48,394	$8,013
Level 3 Vascular Procedures	117	$23,363	$4,426
Level 5 Urology and Related Services	117	$40,170	$7,087
Level 1 Endovascular Procedures	114	$40,462	$4,504
Level 3 Electrophysiologic Procedures	111	$215,473	$32,879
Level 1 Breast/Lymphatic Surgery and Related Procedures	73	$26,949	$5,235
Level 4 Vascular Procedures	68	$40,652	$6,958
Level 3 Pacemaker and Similar Procedures	68	$56,417	$14,569
Level 2 Breast/Lymphatic Surgery and Related Procedures	63	$52,361	$9,051
Level 4 Urology and Related Services	59	$29,043	$4,841
Level 3 Endovascular Procedures	48	$99,095	$15,247
Level 3 Urology and Related Services	48	$19,129	$2,828
Level 2 Laparoscopy and Related Services	40	$87,800	$13,953
Level 2 Vascular Procedures	34	$10,076	$2,224
Level 1 Abdominal/Peritoneal/Biliary and Related Procedures	32	$36,835	$4,804
Level 2 Pacemaker and Similar Procedures	31	$42,012	$11,782
Level 6 Urology and Related Services	30	$54,537	$12,773
Level 2 Upper GI Procedures	28	$13,003	$2,642
Level 2 ICD and Similar Procedures	27	$195,249	$45,076
Level 5 Gynecologic Procedures	26	$35,732	$6,907
Level 4 Endovascular Procedures	23	$145,763	$24,284
Level 4 Gynecologic Procedures	23	$25,625	$4,341
Level 3 Excision/ Biopsy/ Incision and Drainage	22	$21,959	$3,946

Against the California average

For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), Alta Bates Summit Medical Center charged $96,808 on average, 32% less than the California average of $143,063, and was paid $23,021 against a state average of $23,020. For Heart Failure and Shock with MCC (DRG 291), Alta Bates Summit Medical Center charged $76,669 on average, 24% less than the California average of $100,739, and was paid $15,026 against a state average of $15,556. For Septicemia or Severe Sepsis without MV >96 Hours without MCC (DRG 872), Alta Bates Summit Medical Center charged $54,653 on average, 28% less than the California average of $76,120, and was paid $13,212 against a state average of $12,552. For Acute Myocardial Infarction, Discharged Alive with MCC (DRG 280), Alta Bates Summit Medical Center charged $90,248 on average, 27% less than the California average of $123,896, and was paid $18,615 against a state average of $19,122. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $9,124 was 38% below the state average of $14,749. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $32,967 was 21% below the state average of $41,628. For Level 1 Laparoscopy and Related Services (outpatient APC 5361), its average charge of $48,394 was 25% below the state average of $64,351. For Level 3 Vascular Procedures (outpatient APC 5183), its average charge of $23,363 was 23% below the state average of $30,190.

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.