CMS certification 160067
Mercyone Waterloo Medical Center
3421 West Ninth Street, Waterloo, IA 50702
Mercyone Waterloo Medical Center has a CMS overall rating of 4 out of 5 stars. 65% of patients who answered CMS's national survey would definitely recommend it, against a US average of 71%. Of the 24 death, complication, infection and readmission measures CMS could compare, it does better than the nation on 4 and worse on none. Emergency patients spend a median of 3 h 43 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: 666 completed surveys, 23% 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 low; 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 | IA | US |
|---|---|---|---|
| Median time in the emergency department before leaving Lower is better · 363 visits sampled · US median for EDs of the same volume: 2 h 3 min | 3 h 43 min | 2 h 3 min | 2 h 42 min |
| Median time for psychiatric and mental health patients Lower is better · 30 visits sampled | 3 h 50 min | 3 h 37 min | 4 h 17 min |
| Left before being seen Lower is better · 15,611 patients | 10% | 3% | 2% |
| Stroke symptoms: brain scan read within 45 minutes Higher is better · 14 patients | 50% | 64% | 69% |
| Severe sepsis and septic shock: all recommended care given Higher is better · 196 patients | 57% | 63% | 65% |
How Mercyone Waterloo Medical Center 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 |
|---|---|---|---|---|
| Mercyone Waterloo Medical CenterThis hospital | 4/5 | 65% | 3 h 43 min | 4 better |
| Allen HospitalSame city | 3/5 | 70% | 2 h 43 min | 2 better 2 worse |
| Sartori Memorial Hospital, INCSame county · Cedar Falls | Not rated | 82% | 1 h 36 min | No different |
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 Waterloo.
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 1,169 cases | Too few cases | 4.4% | 3.9% |
| Heart attack 110 cases | Too few cases | 11.5% | 11.9% |
| Heart failure 143 cases | Too few cases | 8.5% | 11.1% |
| Pneumonia 155 cases | Too few cases | 19.4% | 15.2% |
| Stroke 86 cases | Too few cases | 10.2% | 11.9% |
| COPD 50 cases | Too few cases | 9.4% | 8.6% |
1 more measure had too few cases here to report.
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 | 0.98 likely 0.56 – 1.39 | 1 |
| After hip or knee replacement 165 cases | Too few cases | 4% | 4.1% |
| Deaths after a serious but treatable surgical complication 30 cases | No different | 176.67 per 1,000 likely 112.94 per 1,000 – 240.41 per 1,000 | 173.3 per 1,000 |
| Pressure ulcers (bed sores) 1,800 cases | No different | 0.32 per 1,000 likely 0 per 1,000 – 1.27 per 1,000 | 0.63 per 1,000 |
| Collapsed lung caused by a procedure 2,530 cases | No different | 0.25 per 1,000 likely 0.02 per 1,000 – 0.47 per 1,000 | 0.21 per 1,000 |
| Broken bones from falls in the hospital 2,477 cases | No different | 0.25 per 1,000 likely 0.04 per 1,000 – 0.46 per 1,000 | 0.27 per 1,000 |
| Bleeding or hematoma after surgery 652 cases | No different | 2.39 per 1,000 likely 0.75 per 1,000 – 4.03 per 1,000 | 2.34 per 1,000 |
| Kidney injury needing dialysis after surgery 278 cases | No different | 1.6 per 1,000 likely 0 per 1,000 – 3.29 per 1,000 | 1.67 per 1,000 |
| Breathing failure after surgery 279 cases | No different | 11.79 per 1,000 likely 2.84 per 1,000 – 20.74 per 1,000 | 9.42 per 1,000 |
| Blood clots in the lungs or legs after surgery 660 cases | No different | 3.18 per 1,000 likely 0.83 per 1,000 – 5.53 per 1,000 | 3.52 per 1,000 |
| Sepsis after surgery 257 cases | No different | 5.75 per 1,000 likely 1.56 per 1,000 – 9.94 per 1,000 | 5.27 per 1,000 |
| Surgical wound splitting open 97 cases | No different | 1.69 per 1,000 likely 0.19 per 1,000 – 3.19 per 1,000 | 1.77 per 1,000 |
| Accidental cut or tear during abdominal surgery 300 cases | No different | 1.26 per 1,000 likely 0.2 per 1,000 – 2.31 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) | No different | 1.01 likely 0.17 – 3.32 | 1 |
| Urinary tract infections from catheters (CAUTI) | No different | 0.21 likely 0.01 – 1.04 | 1 |
| Surgical site infections after colon surgery | No different | 0.79 likely 0.04 – 3.9 | 1 |
| MRSA bloodstream infections | No different | 0.45 likely 0.02 – 2.22 | 1 |
| C. diff intestinal infections | Better | 0.52 likely 0.27 – 0.93 | 1 |
1 more measure had too few cases here to report.
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 154 cases | Too few cases | 13.9% | 14.4% |
| Readmitted after heart failure 222 cases | Too few cases | 18.7% | 21.3% |
| Readmitted after pneumonia 221 cases | Too few cases | 15.2% | 17.3% |
| Readmitted after COPD 110 cases | Too few cases | 19.1% | 20% |
| Readmitted after hip or knee replacement 167 cases | Too few cases | 5% | 5.8% |
| Days back in hospital after a heart attack 139 cases | Too few cases | -16 days per 100 | — |
| Days back in hospital after heart failure 169 cases | Too few cases | -33.1 days per 100 | — |
| Days back in hospital after pneumonia 162 cases | Too few cases | -12 days per 100 | — |
| Unplanned visits after an outpatient colonoscopy 766 cases | No different | 13 per 1,000 likely 9.9 per 1,000 – 17.2 per 1,000 | 13 per 1,000 |
| Hospital admissions during outpatient chemotherapy 138 cases | No different | 9.2 per 100 likely 6.6 per 100 – 12.8 per 100 | 10.7 per 100 |
| ER visits during outpatient chemotherapy 138 cases | No different | 5.8 per 100 likely 3.9 per 100 – 8.5 per 100 | 5.4 per 100 |
| Unplanned visits after outpatient surgery 447 cases | No different | 1 likely 0.8 – 1.4 | — |
2 more measures had too few cases here to report.
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 $27,518
- 2020 $103,769
- 2021 $658,280
- 2022 $909,918
- 2023 $1.2M
- 2024 $1.1M
- 2025 $278,752
What the 2025 general payments were for
| Type of payment | Amount | Payments |
|---|---|---|
| Debt forgiveness | $748 | 2 |
Largest paying companies, 2025
| Company | Amount | Payments |
|---|---|---|
| Eli Lilly and Company | $179,525 | 6 |
| E.R. Squibb & Sons, L.L.C. | $92,315 | 2 |
| Novartis Pharmaceuticals Corporation | $6,164 | 1 |
| Siemens Medical Solutions USA, Inc. | $626 | 1 |
| Stryker Corporation | $122 | 1 |
Largest research studies funded here, 2025
| Study | Amount |
|---|---|
| A STUDY OF DONANEMAB VERSUS PLACEBO IN PARTICIPANTS AT RISK FOR COGNITIVE AND FUNCTIONAL DECLINE OF ALZHEIMER'S DISEASE Eli Lilly and Company · NCT05026866 | $92,131 |
| Connect MM: The Multiple Myeloma Disease Registry. The purpose of the Connect MM Registry is to explore the natural history and real world management… E.R. Squibb & Sons, L.L.C. | $91,565 |
| ASSESSMENT OF SAFETY, TOLERABILITY, AND EFFICACY MEASURED BY AMYLOID REDUCTION OF LY3372993 IN EARLY SYMPTOMATIC ALZHEIMER'S DISEASE Eli Lilly and Company · NCT05463731 | $56,457 |
| ASSESSMENT OF SAFETY, TOLERABILITY, AND EFFICACY OF DONANEMAB IN EARLY SYMPTOMATIC ALZHEIMERS DISEASE Eli Lilly and Company · NCT04437511 | $30,937 |
| Randomized, Double-blind, Placebo-controlled, Multicenter Trial, Assessing the Impact of Inclisiran on Major Adverse Cardiovascular Events in Partici… Novartis Pharmaceuticals Corporation | $6,164 |
| Connect MM: The Multiple Myeloma Disease Registry. The purpose of the Connect MM Registry is to explore the natural history and real world management… E.R. Squibb & Sons, L.L.C. · NCT01081028 | $750 |
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 Mercyone Waterloo Medical Center
Is Mercyone Waterloo Medical Center a good hospital?
Mercyone Waterloo Medical Center has a CMS overall rating of 4 out of 5 stars. Of the 24 death, complication, infection and readmission measures CMS could compare, it does better than the nation on 4 and worse on none. These are hospital-wide results published by CMS; they do not rate individual doctors or departments.
Would patients recommend Mercyone Waterloo Medical Center?
65% of patients who answered CMS's national survey would definitely recommend it, against a US average of 71%. The figure comes from 666 completed HCAHPS surveys.
How long is the wait in the Mercyone Waterloo Medical Center emergency room?
Emergency patients spend a median of 3 h 43 min in its emergency department before leaving (US median 2 h 42 min). Among US emergency departments with low patient volume, like this one, the median is 2 h 3 min. 10% of emergency patients left before being seen (US 2%). These are medians over a year of visits, not a live wait time.
Does Mercyone Waterloo Medical Center receive money from drug and device companies?
Drug and device makers reported $278,752 in payments to Mercyone Waterloo Medical Center 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.