CMS certification 230046
University of Michigan Health System
1500 E Medical Center Drive, Spc 5474, Ann Arbor, MI 48109
University of Michigan Health System has a CMS overall rating of 4 out of 5 stars. 82% of patients who answered CMS's national survey would definitely recommend it, against a US average of 71%. Of the 27 death, complication, infection and readmission measures CMS could compare, it does better than the nation on 8 and worse on 3. Emergency patients spend a median of 5 h 45 min in its emergency department before leaving (US median 2 h 42 min).
Every figure on this page is published by CMS; we arrange and explain it, and score nothing ourselves.
What patients said
Answers from patients who stayed here, collected by CMS in the national HCAHPS survey: 824 completed surveys, 25% response rate, Oct 2024 – Sep 2025.
Emergency department
How long emergency patients spent here and how some time-critical care went, from CMS's timely and effective care measures, Oct 2024 – Sep 2025. CMS classes this emergency department's patient volume as very high; busier departments tend to have longer times, so the national median for departments of the same volume is shown too. These are medians over a year of visits, not a live wait time.
| Measure | This hospital | MI | US |
|---|---|---|---|
| Median time in the emergency department before leaving Lower is better · 348 visits sampled · US median for EDs of the same volume: 3 h 21 min | 5 h 45 min | 2 h 39 min | 2 h 42 min |
| Median time for psychiatric and mental health patients Lower is better · 32 visits sampled | 5 h 56 min | 4 h 26 min | 4 h 17 min |
| Left before being seen Lower is better · 117,586 patients | 3% | 3% | 2% |
| Stroke symptoms: brain scan read within 45 minutes Higher is better · 16 patients | 38% | 72% | 69% |
| Severe sepsis and septic shock: all recommended care given Higher is better · 465 patients | 57% | 60% | 65% |
How University of Michigan Health System compares with nearby hospitals
The closest hospitals of the same kind that CMS rates or surveys - the same city first, then the same county and ZIP area. Every figure is CMS's: the overall star rating, the share of patients who would definitely recommend the hospital, the median time emergency patients spent before leaving, and how many death, complication, infection and readmission measures CMS found better or worse than the national rate.
| Hospital | CMS stars | Would recommend | ER median time | Vs the nation |
|---|---|---|---|---|
| University of Michigan Health SystemThis hospital | 4/5 | 82% | 5 h 45 min | 8 better 3 worse |
| Trinity Health Ann Arbor HospitalSame city | 4/5 | 77% | 4 h 1 min | 6 better 1 worse |
| VA Ann Arbor Healthcare SystemSame city | 5/5 | 89% | — | 4 better 1 worse |
| Chelsea HospitalSame county · Chelsea | 4/5 | 87% | 3 h 16 min | 2 better |
| Forest Health Medical CenterSame county · Ypsilanti | Not rated | 80% | — | No different |
| Beaumont Hospital - DearbornSame ZIP area · Dearborn | 2/5 | 49% | 3 h 22 min | 6 better 5 worse |
Hospitals differ in size and in how sick their patients are. CMS adjusts its outcome measures for that, but a star or a percentage is a starting point for questions, not a verdict. All hospitals in Ann Arbor.
Deaths
How many patients died within 30 days of admission, adjusted by CMS for how sick they were. Lower is better. Data from Jul 2022 – Jun 2025.
| Measure | CMS comparison | This hospital | National |
|---|---|---|---|
| All patients, hospital-wide 7,196 cases | Too few cases | 2.4% | 3.9% |
| Heart attack 165 cases | Too few cases | 9.9% | 11.9% |
| Heart failure 734 cases | Too few cases | 8.9% | 11.1% |
| Pneumonia 332 cases | Too few cases | 10.3% | 15.2% |
| Stroke 390 cases | Too few cases | 11.3% | 11.9% |
| COPD 138 cases | Too few cases | 10% | 8.6% |
| Heart bypass surgery (CABG) 108 cases | Too few cases | 2% | 2.4% |
Complications
How often patients had serious complications, most of them after surgery, adjusted for how sick they were. Lower is better. Data from Jul 2022 – Jun 2024.
| Measure | CMS comparison | This hospital | National |
|---|---|---|---|
| Serious complications, combined measure | No different | 0.92 likely 0.75 – 1.09 | 1 |
| After hip or knee replacement 99 cases | Too few cases | 4.9% | 4.1% |
| Deaths after a serious but treatable surgical complication 265 cases | Worse | 219.85 per 1,000 likely 183.61 per 1,000 – 256.09 per 1,000 | 173.3 per 1,000 |
| Pressure ulcers (bed sores) 14,078 cases | No different | 0.41 per 1,000 likely 0.03 per 1,000 – 0.8 per 1,000 | 0.63 per 1,000 |
| Collapsed lung caused by a procedure 14,473 cases | No different | 0.27 per 1,000 likely 0.1 per 1,000 – 0.43 per 1,000 | 0.21 per 1,000 |
| Broken bones from falls in the hospital 15,885 cases | No different | 0.26 per 1,000 likely 0.1 per 1,000 – 0.43 per 1,000 | 0.27 per 1,000 |
| Bleeding or hematoma after surgery 4,962 cases | Worse | 3.41 per 1,000 likely 2.49 per 1,000 – 4.33 per 1,000 | 2.34 per 1,000 |
| Kidney injury needing dialysis after surgery 3,139 cases | No different | 1.91 per 1,000 likely 1.03 per 1,000 – 2.78 per 1,000 | 1.67 per 1,000 |
| Breathing failure after surgery 3,010 cases | No different | 9.57 per 1,000 likely 6.92 per 1,000 – 12.21 per 1,000 | 9.42 per 1,000 |
| Blood clots in the lungs or legs after surgery 5,454 cases | No different | 2.78 per 1,000 likely 1.44 per 1,000 – 4.13 per 1,000 | 3.52 per 1,000 |
| Sepsis after surgery 3,258 cases | No different | 4.45 per 1,000 likely 2.57 per 1,000 – 6.33 per 1,000 | 5.27 per 1,000 |
| Surgical wound splitting open 1,414 cases | No different | 1.99 per 1,000 likely 0.77 per 1,000 – 3.2 per 1,000 | 1.77 per 1,000 |
| Accidental cut or tear during abdominal surgery 4,021 cases | No different | 1.16 per 1,000 likely 0.46 per 1,000 – 1.86 per 1,000 | 1.06 per 1,000 |
Infections caught in the hospital
Standardized infection ratio: 1.0 means as many infections as CMS predicted for a hospital like this one. Lower is better. Data from Oct 2024 – Sep 2025.
| Measure | CMS comparison | This hospital | National |
|---|---|---|---|
| Bloodstream infections from central lines (CLABSI) | Better | 0.41 likely 0.29 – 0.57 | 1 |
| Urinary tract infections from catheters (CAUTI) | Better | 0.53 likely 0.36 – 0.77 | 1 |
| Surgical site infections after colon surgery | No different | 1.12 likely 0.71 – 1.68 | 1 |
| Surgical site infections after abdominal hysterectomy | No different | 1.36 likely 0.43 – 3.27 | 1 |
| MRSA bloodstream infections | Better | 0.6 likely 0.35 – 0.96 | 1 |
| C. diff intestinal infections | Better | 0.5 likely 0.4 – 0.62 | 1 |
Readmissions and return visits
How often patients had to come back to a hospital after going home. Lower is better. Data from Jul 2023 – Jun 2025.
| Measure | CMS comparison | This hospital | National |
|---|---|---|---|
| Readmitted after a heart attack 241 cases | Too few cases | 14.6% | 14.4% |
| Readmitted after heart failure 1,425 cases | Too few cases | 19.2% | 21.3% |
| Readmitted after pneumonia 568 cases | Too few cases | 16.6% | 17.3% |
| Readmitted after COPD 280 cases | Too few cases | 19.3% | 20% |
| Readmitted after heart bypass surgery 158 cases | Too few cases | 9.4% | 11% |
| Readmitted after hip or knee replacement 111 cases | Too few cases | 5.3% | 5.8% |
| Days back in hospital after a heart attack 176 cases | Too few cases | 10.7 days per 100 | — |
| Days back in hospital after heart failure 871 cases | Too few cases | 0.8 days per 100 | — |
| Days back in hospital after pneumonia 344 cases | Too few cases | 85.5 days per 100 | — |
| Unplanned visits after an outpatient colonoscopy 4,556 cases | No different | 13.7 per 1,000 likely 11.2 per 1,000 – 16.5 per 1,000 | 13 per 1,000 |
| Hospital admissions during outpatient chemotherapy 1,530 cases | No different | 9.6 per 100 likely 8.2 per 100 – 11.1 per 100 | 10.7 per 100 |
| ER visits during outpatient chemotherapy 1,530 cases | No different | 5.3 per 100 likely 4.4 per 100 – 6.5 per 100 | 5.4 per 100 |
| Unplanned visits after outpatient surgery 2,376 cases | Better | 0.7 likely 0.6 – 0.9 | — |
1 more measure had too few cases here to report.
Clinicians registered at this address
5,419 clinicians give this hospital's street address as their practice location in NPPES, the federal provider registry, plus 750 residents and trainees. The same address can take in offices and clinics in the building, and a listing does not prove admitting privileges or current employment.
| Specialty | Clinicians |
|---|---|
| Nurse Practitioner | 557 |
| Physician Assistant | 461 |
| Nurse Anesthetist, Certified Registered | 343 |
| Anesthesiology | 332 |
| Internal Medicine | 291 |
| Diagnostic Radiology | 243 |
| Emergency Medicine | 192 |
| Physical Therapist | 154 |
| Psychiatry | 95 |
| Clinical | 94 |
| Gastroenterology | 94 |
| Obstetrics & Gynecology | 93 |
First 12 alphabetically
Money from drug and device companies
Drug and device makers have to report what they pay teaching hospitals to CMS's Open Payments program. At many teaching hospitals most of it is research funding, or royalties for inventions the hospital licensed to a company. A payment on its own does not show a conflict of interest.
- 2019 $42.6M
- 2020 $57.5M
- 2021 $63.4M
- 2022 $64.9M
- 2023 $65.4M
- 2024 $67.8M
- 2025 $73.3M
What the 2025 general payments were for
| Type of payment | Amount | Payments |
|---|---|---|
| Royalties and licensing fees | $26M | 25 |
| Grants | $1.7M | 66 |
| Speaking, teaching and other services | $1.4M | 121 |
| Consulting fees | $1.2M | 11 |
| Space rental and facility fees | $1M | 124 |
| Charitable contributions | $186,383 | 11 |
| Medical devices and supplies on long-term loan | $105,237 | 5 |
| Education | $47,916 | 8 |
| Gifts | $14,500 | 4 |
| Debt forgiveness | $543 | 3 |
Largest paying companies, 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $17.5M | 28 |
| Abbvie INC. | $5.1M | 169 |
| Takeda Pharmaceuticals U.S.A., Inc. | $5M | 119 |
| Janssen Research & Development, LLC | $4.3M | 204 |
| Merck Sharp & Dohme LLC | $4.1M | 46 |
| Genentech, Inc. | $3.2M | 152 |
| AstraZeneca AB | $2.8M | 3 |
| Novartis Pharmaceuticals Corporation | $2.4M | 38 |
Largest research studies funded here, 2025
| Study | Amount |
|---|---|
| ACUTE Trial: Acute severe ulcerative Colitis - Upadacitinib vs corticosteroid while Transitioning away from the Emergency setting ABBVIE INC. | $3.3M |
| A PHASE 1, TWO ARM, OPEN-LABEL, SINGLE-DOSE STUDY TO EVALUATE THE PHARMACOKINETICS AND LOCAL GI DRUG RELEASE/DISSOLUTION OF RIFAXIMIN SOLID SOLUBLE D… Bausch Health US, LLC | $1.8M |
| An Open Label, Multi-center Asciminib Roll-over Study to Assess Long-term Safety in Patients Who Have Completed a Novartis Sponsored Asciminib Study … Novartis Pharmaceuticals Corporation | $1.8M |
| Biology of Cancer Case-Control Study Genentech, Inc. | $1.6M |
| A Phase 1 , Dose-escalation Study to Evaluate Safety and Tolerability of Belzutifan MK-6482 in Participants With Advanced Clear Cell Renal Cell Carci… Merck Sharp & Dohme LLC | $751,980 |
| A Phase 2 Study to Evaluate the Efficacy and Safety of Belzutifan MK-6482, formerly PT2977 Monotherapy in Participants with Advanced Pheochromocytoma… Merck Sharp & Dohme LLC | $689,213 |
| A Phase 1, Multicenter, Open-Label Study Of CC-97540 (BMS-986353), CD19-Targeted Nex-T Chimeric Antigen Receptor (CAR) T Cells, in Participants with … Celgene Corporation | $683,259 |
| An Open-Label Phase 2 Study to Evaluate PT2977 For The Treatment of Von Hippel-Lindau Disease-Associated Renal Cell Carcinoma Merck Sharp & Dohme LLC | $599,208 |
Amounts are as the paying companies reported them to CMS; Open Payments data retrieved 13 Sep 2026. Full record on CMS Open Payments.
How to read this page
- Everything here is published by CMS on Care Compare. We arrange it and explain it; the star ratings and the better / worse verdicts are CMS's, not ours.
- “No different” is the most common result on most measures at most hospitals. CMS only calls a result better or worse when the difference from the national rate is statistically clear.
- Death, complication and readmission rates are adjusted by CMS for how sick patients were, so hospitals that treat sicker patients can be compared fairly.
- Infection results are ratios: 1.0 means as many infections as CMS predicted for a hospital like this one, below 1.0 is fewer.
- These are hospital-wide results. They do not rate an individual doctor, nurse or department, and they are not medical advice.
CMS Care Compare data retrieved 4 Oct 2026, refreshed weekly. Where this data comes from and how we handle it · Report an error
Common questions about University of Michigan Health System
Is University of Michigan Health System a good hospital?
University of Michigan Health System has a CMS overall rating of 4 out of 5 stars. Of the 27 death, complication, infection and readmission measures CMS could compare, it does better than the nation on 8 and worse on 3. These are hospital-wide results published by CMS; they do not rate individual doctors or departments.
Would patients recommend University of Michigan Health System?
82% of patients who answered CMS's national survey would definitely recommend it, against a US average of 71%. The figure comes from 824 completed HCAHPS surveys.
How long is the wait in the University of Michigan Health System emergency room?
Emergency patients spend a median of 5 h 45 min in its emergency department before leaving (US median 2 h 42 min). Among US emergency departments with very high patient volume, like this one, the median is 3 h 21 min. 3% of emergency patients left before being seen (US 2%). These are medians over a year of visits, not a live wait time.
Does University of Michigan Health System receive money from drug and device companies?
Drug and device makers reported $73.3M in payments to University of Michigan Health System for 2025, most of it research funding, under the federal Open Payments program. A payment on its own does not show a conflict of interest.