Avera St Mary's Hospital in Pierre, SD
In a medical emergency, call 911. This page is for information only.
About Avera St Mary's Hospital
Avera St Mary's Hospital is an acute care hospital in Pierre, Hughes County, South Dakota. It reports its ownership to Medicare as nonprofit (private). It provides emergency services. It is listed as a Community Trauma Hospital under its state trauma system. Its CMS Overall Hospital Quality Star Rating is 2 out of 5. It has 50 licensed beds, according to state license data via HIFLD. It meets the CMS Birthing-Friendly designation criteria for maternity care.
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
- Clostridioides difficile (C. diff) infectionsNo different · SIR 0.00
81% 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 recommend64%
- Rated the hospital 9 or 1071%
- Completed surveys263
Survey period ending September 2025. Source: CMS HCAHPS Patient Survey.
Map
44.36117, -100.34218
Frequently asked questions
Where is Avera St Mary's Hospital located?
Avera St Mary's Hospital is at 801 E Sioux, Pierre, SD 57501 in Hughes County.
Does Avera St Mary's Hospital have an emergency room?
Yes. Avera St Mary's Hospital reports emergency services to Medicare, and patients spent a median of 127 minutes in its emergency department before leaving. In a life-threatening emergency, call 911.
What is the CMS star rating of Avera St Mary's Hospital?
Avera St Mary's Hospital has a CMS Overall Hospital Quality Star Rating of 2 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 Avera St Mary's Hospital a trauma center?
Yes. It is listed as a Community Trauma Hospital (state designation) 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 South Dakota 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 Avera St Mary's Hospital?
The main phone number on record with Medicare is (605) 224-3100.
Would patients recommend Avera St Mary's Hospital?
In the most recent HCAHPS patient survey (263 completed surveys), 64% of patients said they would definitely recommend the hospital, and 71% rated it 9 or 10 out of 10.
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