Massachusetts / Mount Auburn Hospital
CMS certification 220002 · Cambridge, MA · 5 entries in CMS's price-transparency list
Mount Auburn Hospital: charges and Medicare payments
Mount Auburn Hospital reported 1,948 Medicare inpatient stays across 63 DRGs in 2024. Across them it charged 1.67 times what it was paid — among the lower ratios in Massachusetts, number 46 of 52 hospitals with at least 100 stays (state median 2×, national 4.15×). Its most frequent stay was DRG 871, Septicemia or Severe Sepsis without MV >96 Hours with MCC: 243 stays at an average charge of $33,071, 63% below the national average. It also billed 2,394 outpatient services, charging 2.66 times what Medicare paid.
- 1Medicare inpatient stays 1,948
- 2Charge ÷ paid, inpatient 1.67×
- 3Rank in MA (highest ratio = 1) 46 of 52
- 4CMS price-transparency actions 5
Inpatient stays
For the 63 DRGs that can be compared with the national average, Mount Auburn Hospital 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 | 243 | $33,071 | -63% | $20,674 |
| 291 Heart Failure and Shock with MCC | 124 | $23,642 | -58% | $13,643 |
| 280 Acute Myocardial Infarction, Discharged Alive with MCC | 99 | $27,034 | -64% | $17,080 |
| 177 Respiratory Infections and Inflammations with MCC | 93 | $23,765 | -66% | $17,409 |
| 193 Simple Pneumonia and Pleurisy with MCC | 79 | $20,704 | -65% | $13,695 |
| 378 Gastrointestinal Hemorrhage with CC | 56 | $24,099 | -50% | $10,522 |
| 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 56 | $16,085 | -60% | $8,673 |
| 689 Kidney and Urinary Tract Infections with MCC | 55 | $20,141 | -61% | $12,312 |
| 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 51 | $16,696 | -55% | $8,530 |
| 470 Major Hip and Knee Joint Replacement or Reattachment of... | 45 | $26,689 | -71% | $19,315 |
| 682 Renal Failure with MCC | 40 | $23,735 | -64% | $15,265 |
| 190 Chronic Obstructive Pulmonary Disease with MCC | 38 | $22,710 | -55% | $11,923 |
| 698 Other Kidney and Urinary Tract Diagnoses with MCC | 37 | $26,981 | -63% | $17,293 |
| 690 Kidney and Urinary Tract Infections without MCC | 32 | $16,163 | -57% | $8,764 |
| 377 Gastrointestinal Hemorrhage with MCC | 30 | $32,674 | -62% | $18,754 |
| 065 Intracranial Hemorrhage or Cerebral Infarction with CC or... | 28 | $20,385 | -63% | $10,998 |
| 322 Percutaneous Cardiovascular Procedures with Intraluminal... | 28 | $54,089 | -53% | $18,814 |
| 603 Cellulitis without MCC | 28 | $16,748 | -55% | $9,560 |
| 312 Syncope and Collapse | 27 | $23,821 | -48% | $12,576 |
| 481 Hip and Femur Procedures except Major Joint with CC | 27 | $33,177 | -67% | $21,714 |
| 683 Renal Failure with CC | 27 | $16,725 | -59% | $9,575 |
| 178 Respiratory Infections and Inflammations with CC | 26 | $17,171 | -62% | $10,347 |
| 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and... | 26 | $25,721 | -57% | $14,909 |
| 267 Endovascular Cardiac Valve Replacement and Supplement... | 24 | $111,020 | -50% | $49,231 |
| 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive... | 23 | $20,617 | -66% | $13,664 |
| 872 Septicemia or Severe Sepsis without MV >96 Hours without MCC | 23 | $18,941 | -61% | $11,142 |
| 309 Cardiac Arrhythmia and Conduction Disorders with CC | 22 | $13,652 | -62% | $8,167 |
| 812 Red Blood Cell Disorders without MCC | 22 | $22,100 | -50% | $9,945 |
| 064 Intracranial Hemorrhage or Cerebral Infarction with MCC | 21 | $25,654 | -74% | $17,493 |
| 330 Major Small and Large Bowel Procedures with CC | 20 | $34,082 | -71% | $24,317 |
| 897 Alcohol, Drug Abuse or Dependence without Rehabilitation... | 20 | $19,155 | -48% | $9,414 |
| 281 Acute Myocardial Infarction, Discharged Alive with CC | 19 | $18,578 | -63% | $9,729 |
| 552 Medical Back Problems without MCC | 19 | $20,548 | -58% | $10,717 |
| 853 Infectious and Parasitic Diseases with O.R. Procedures with... | 19 | $71,201 | -69% | $55,270 |
| 389 Gastrointestinal Obstruction with CC | 18 | $14,784 | -62% | $8,776 |
| 057 Degenerative Nervous System Disorders without MCC | 17 | $18,714 | -67% | $13,597 |
| 194 Simple Pneumonia and Pleurisy with CC | 17 | $20,693 | -46% | $9,199 |
| 287 Circulatory Disorders except AMI, with Cardiac... | 17 | $21,671 | -66% | $11,329 |
| 394 Other Digestive System Diagnoses with CC | 17 | $13,573 | -71% | $10,590 |
| 563 Fracture, Sprain, Strain and Dislocation except Femur, Hip,... | 17 | $16,936 | -60% | $9,831 |
| 637 Diabetes with MCC | 17 | $24,912 | -63% | $15,338 |
| 189 Pulmonary Edema and Respiratory Failure | 16 | $25,173 | -56% | $13,561 |
| 308 Cardiac Arrhythmia and Conduction Disorders with MCC | 16 | $22,544 | -60% | $13,077 |
| 321 Percutaneous Cardiovascular Procedures with Intraluminal... | 16 | $82,042 | -50% | $32,051 |
| 643 Endocrine Disorders with MCC | 16 | $31,319 | -58% | $17,958 |
| 644 Endocrine Disorders with CC | 16 | $14,157 | -71% | $11,328 |
| 699 Other Kidney and Urinary Tract Diagnoses with CC | 16 | $13,473 | -72% | $10,731 |
| 101 Seizures without MCC | 14 | $20,634 | -58% | $10,294 |
| 175 Pulmonary Embolism with MCC or Acute Cor Pulmonale | 14 | $33,699 | -48% | $16,005 |
| 202 Bronchitis and Asthma with CC/MCC | 14 | $18,638 | -60% | $10,351 |
| 234 Coronary Bypass with Cardiac Catheterization or Open... | 14 | $82,998 | -69% | $52,297 |
| 522 Hip Replacement with Principal Diagnosis of Hip Fracture... | 14 | $29,464 | -71% | $22,054 |
| 638 Diabetes with CC | 14 | $14,092 | -66% | $9,427 |
| 286 Circulatory Disorders except AMI, with Cardiac... | 13 | $33,667 | -70% | $22,645 |
| 536 Fractures of Hip and Pelvis without MCC | 13 | $15,095 | -60% | $8,670 |
| 543 Pathological Fractures and Musculoskeletal and Connective... | 13 | $17,400 | -65% | $11,380 |
| 981 Extensive O.R. Procedures Unrelated To Principal Diagnosis... | 13 | $76,453 | -65% | $49,609 |
| 236 Coronary Bypass without Cardiac Catheterization without MCC | 12 | $56,886 | -73% | $39,281 |
| 329 Major Small and Large Bowel Procedures with MCC | 12 | $56,345 | -74% | $42,060 |
| 870 Septicemia or Severe Sepsis with MV >96 Hours | 12 | $98,621 | -69% | $66,368 |
Showing the 60 most frequent of 63 DRGs.
Outpatient services
Against the Massachusetts average
For Septicemia or Severe Sepsis without MV >96 Hours with MCC (DRG 871), Mount Auburn Hospital charged $33,071 on average, 27% less than the Massachusetts average of $45,229, and was paid $20,674 against a state average of $19,536. For Heart Failure and Shock with MCC (DRG 291), Mount Auburn Hospital charged $23,642 on average, 22% less than the Massachusetts average of $30,373, and was paid $13,643 against a state average of $12,996. For Acute Myocardial Infarction, Discharged Alive with MCC (DRG 280), Mount Auburn Hospital charged $27,034 on average, 33% less than the Massachusetts average of $40,483, and was paid $17,080 against a state average of $16,045. For Respiratory Infections and Inflammations with MCC (DRG 177), Mount Auburn Hospital charged $23,765 on average, 36% less than the Massachusetts average of $37,072, and was paid $17,409 against a state average of $15,861. For Comprehensive Observation Services (outpatient APC 8011), its average charge of $8,177 was 42% below the state average of $14,010. For Level 2 Excision/ Biopsy/ Incision and Drainage (outpatient APC 5072), its average charge of $6,621 was 0% below the state average of $6,596. For Level 1 Endovascular Procedures (outpatient APC 5191), its average charge of $8,723 was 56% below the state average of $19,611. For Level 2 Upper GI Procedures (outpatient APC 5302), its average charge of $6,684 was 20% below the state average of $8,334.
Price-transparency record
CMS's enforcement list records these actions for a hospital named Mount Auburn Hospital in Cambridge, MA, under the federal hospital price-transparency rule (45 CFR part 180), which requires hospitals to post their standard charges online:
- Warning Notice — 2022-12-21 (CMS case 1205)
- Closure Notice — 2023-04-13 (CMS case 1205)
- CAP Request — 2025-02-27 (CMS case 3153)
- CAP Request — 2025-04-16 (CMS case 3153)
- Closure Notice — 2025-04-23 (CMS case 3153)
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.