Mary Greeley Medical Center in Ames, IA
In a medical emergency, call 911. This page is for information only.
About Mary Greeley Medical Center
Mary Greeley Medical Center is an acute care hospital in Ames, Story County, Iowa. It reports its ownership to Medicare as public (local government). It provides emergency services. It is listed as a Level III trauma center. Its CMS Overall Hospital Quality Star Rating is 4 out of 5. It has 220 licensed beds, according to state license data via HIFLD. CMS also lists an inpatient rehabilitation unit inside the hospital. It meets the CMS Birthing-Friendly designation criteria for maternity care. The nearest other listed hospital is Story County Hospital, about 9.2 mi away.
Quality ratings
How this hospital compares with the national rate on each measure group:
Source: Centers for Medicare & Medicaid Services, Hospital General Information. How star ratings work.
Emergency room times
Lower times are better. Reporting period ending September 2025. Source: CMS Timely and Effective Care. What these numbers mean.
Infections and sepsis care
- MRSA bloodstream infectionsNo different · SIR 0.86
- Catheter-associated urinary tract infections (CAUTI)No different · SIR 1.26
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.47
- Central line bloodstream infections (CLABSI)No different · SIR 0.00
- Surgical site infections after colon surgeryNo different · SIR 0.89
68% of patients with severe sepsis or septic shock received all the recommended early care steps (SEP-1). Higher is better.
SIR is the standardized infection ratio: below 1 means fewer infections than predicted for a hospital like this one. Period ending September 2025. Source: CMS Healthcare-Associated Infections and Timely and Effective Care.
What patients say
- Patient survey star rating
- Would definitely recommend82%
- Rated the hospital 9 or 1079%
- Completed surveys1,555
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
42.03220, -93.61068
Nearby hospitals
Frequently asked questions
Where is Mary Greeley Medical Center located?
Mary Greeley Medical Center is at 1111 Duff Avenue, Ames, IA 50010 in Story County.
Does Mary Greeley Medical Center have an emergency room?
Yes. Mary Greeley Medical Center reports emergency services to Medicare, and patients spent a median of 146 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of Mary Greeley Medical Center?
Mary Greeley Medical Center has a CMS Overall Hospital Quality Star Rating of 4 out of 5. The rating combines measures of mortality, safety of care, readmission, patient experience and timely and effective care, compared with hospitals nationwide.
Is Mary Greeley Medical Center a trauma center?
Yes. It is listed as a Level III trauma center in the HIFLD hospitals data, which is compiled from state trauma registries (source date April 2024). Trauma designations are renewed periodically, so confirm with the Iowa EMS or trauma program. In an emergency, call 911: paramedics take seriously injured patients to the right trauma center.
What is the phone number of Mary Greeley Medical Center?
The main phone number on record with Medicare is (515) 239-2011.
Would patients recommend Mary Greeley Medical Center?
In the most recent HCAHPS patient survey (1,555 completed surveys), 82% of patients said they would definitely recommend the hospital, and 79% rated it 9 or 10 out of 10.
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