Mercy Hospital Washington in Washington, MO
Also known as Saint John Mercy Hospital
In a medical emergency, call 911. This page is for information only.
About Mercy Hospital Washington
Mercy Hospital Washington is an acute care hospital in Washington, Franklin County, Missouri. It reports its ownership to Medicare as nonprofit (private). 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 140 licensed beds, according to state license data via HIFLD. It meets the CMS Birthing-Friendly designation criteria for maternity care. The nearest other listed hospital is SSM Health Saint Joseph Hospital, about 20 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 0.00
- Clostridioides difficile (C. diff) infectionsBetter than national · SIR 0.10
- Surgical site infections after colon surgeryNo different · SIR 1.43
83% 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 recommend69%
- Rated the hospital 9 or 1070%
- Completed surveys376
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
38.55218, -91.00195
Nearby hospitals
- SSM Health Saint Joseph Hospital500 Medical Drive, Wentzville, MO · Emergency roomHospital20 mi
- Progress West Hospital2 Progress Point Pkwy, O'Fallon, MO · Level II traumaAcute care hospital20 mi
- Centerpointe Hospital4801 Weldon Spring Parkway, Saint Charles, MOPsychiatric hospital21 mi
- SSM St Joseph Hospital West100 Medical Plaza, Lake Saint Louis, MO · Level III traumaAcute care hospital21 mi
Frequently asked questions
Where is Mercy Hospital Washington located?
Mercy Hospital Washington is at 901 East 5th Street, Washington, MO 63090 in Franklin County.
Does Mercy Hospital Washington have an emergency room?
Yes. Mercy Hospital Washington reports emergency services to Medicare, and patients spent a median of 159 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of Mercy Hospital Washington?
Mercy Hospital Washington 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 Mercy Hospital Washington 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 Missouri 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 Mercy Hospital Washington?
The main phone number on record with Medicare is (636) 239-8000.
Would patients recommend Mercy Hospital Washington?
In the most recent HCAHPS patient survey (376 completed surveys), 69% of patients said they would definitely recommend the hospital, and 70% rated it 9 or 10 out of 10.
Related guides
- How CMS Hospital Star Ratings WorkThe five measure groups behind the 1 to 5 star Overall Hospital Quality Star Rating, how it is calculated and what it leaves out.
- How to Choose a Hospital to Give BirthLevels of maternal and newborn care, the CMS Birthing-Friendly designation, quality data and questions to ask on a tour.
- How to Choose a HospitalA practical checklist for planned care: insurance networks, procedure volume, quality ratings, certifications and cost estimates.
- ER Wait Times ExplainedHow triage and the Emergency Severity Index decide who is seen first, why emergency rooms get crowded and where to find timing data.