Acute Care Hospital

Avera St. Mary's Hospital

801 E Sioux, Pierre, SD 57501
24/7 Emergency Services Nonprofit
2 out of 5 Stars Why 2 stars? Avera St. Mary's Hospital's 2-star rating reflects above-average performance on Timely Care.

CMS Overall Hospital Quality Star Rating · Avera St. Mary's Hospital

How was Avera St. Mary's Hospital's 2-star rating calculated?

The CMS Overall Hospital Quality Star Rating applies to acute care hospitals like Avera St. Mary's Hospital. CMS standardizes every underlying measure against the national rate, computes a weighted score for each of five domains, sums them by the fixed weights below, and assigns 1–5 stars using k-means clustering across all reporting hospitals.

Domains that fed Avera St. Mary's Hospital's rating
Domain Weight Measures reported Hospital performance vs. national
Mortality 22% 5 of 7 0 better 4 same 1 worse
Safety of Care 22% 13 of 19 0 better 13 same 0 worse
Readmissions 22% 4 of 6 1 better 3 same 0 worse
Timely & Effective Care 12% 14 of 22 5 better 8 same 1 worse
Patient Experience 22% HCAHPS See HCAHPS detail below

How star meaning varies by hospital type. This CMS Overall Star Rating only applies to acute care hospitals. Children's hospitals (Pediatric Quality), psychiatric hospitals (IPFQR), inpatient rehabilitation facilities (IRF QRP), long-term acute care hospitals (LTACH QRP), and VA medical centers each use separate quality programs designed for their patient populations. Comparing star ratings across these facility types isn't meaningful — see the methodology page for the full mapping of which program applies to which facility.

How CareRanks computes ratings → · CMS official methodology ↗

Emergency & urgent care

How this emergency department performs on the measures that matter most when you need care fast.

129 min Typical ER visit before heading home Near the national median of 148 min
1% Walked out before being seen Better than ~75% of hospitals · national median 1%
81% Recommended sepsis care given Better than ~75% of hospitals · national median 64%

From CMS Timely & Effective Care reporting.

Quality measures

Mortality

Same as National Average

Measures the rate at which patients die within 30 days of hospital admission for specific conditions. A lower mortality rate indicates better outcomes.

Underlying measures: Hybrid Hospital-Wide All-Cause Risk Standardized Mortality Rate No Different Than the National Rate Hospital score: 4.10 95% interval: 3.20 – 5.00 Sample size: 262 Reporting period: 07/01/2023 – 06/30/2024 CMS measure id: Hybrid_HWM Death rate for COPD patients No Different Than the National Rate Hospital score: 8.80 95% interval: 5.00 – 15.20 Sample size: 36 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: MORT_30_COPD Death rate for pneumonia patients No Different Than the National Rate Hospital score: 20.00 95% interval: 15.00 – 26.00 Sample size: 111 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: MORT_30_PN Death rate for stroke patients No Different Than the National Rate Hospital score: 13.10 95% interval: 9.10 – 18.80 Sample size: 37 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: MORT_30_STK Death rate for heart failure patients Worse Than the National Rate Hospital score: 17.30 95% interval: 11.90 – 24.50 Sample size: 48 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: MORT_30_HF Death rate for CABG surgery patients Not Available Hospital score: — Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: MORT_30_CABG Death rate for heart attack patients Number of Cases Too Small Hospital score: — Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: MORT_30_AMI

Safety of Care

Same as National Average

Tracks hospital-acquired infections, surgical complications, and other patient safety indicators. Lower rates indicate better safety practices.

Underlying measures: Abdominopelvic accidental puncture or laceration rate No Different Than the National Rate Hospital score: 1.02 95% interval: 0.00 – 2.10 Sample size: 121 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_15 Clostridium Difficile (C.Diff) No Different than National Benchmark Hospital score: 0.00 SIR Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: HAI_6_SIR Iatrogenic pneumothorax rate No Different Than the National Rate Hospital score: 0.20 95% interval: 0.00 – 0.44 Sample size: 1,030 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_06 Rate of complications for hip/knee replacement patients No Different Than the National Rate Hospital score: 4.50 95% interval: 2.60 – 7.70 Sample size: 90 Reporting period: 04/01/2021 – 03/31/2024 CMS measure id: COMP_HIP_KNEE In-hospital fall-associated fracture rate No Different Than the National Rate Hospital score: 0.26 95% interval: 0.05 – 0.48 Sample size: 997 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_08 Postoperative hemorrhage or hematoma rate No Different Than the National Rate Hospital score: 2.27 95% interval: 0.56 – 3.99 Sample size: 233 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_09 Perioperative pulmonary embolism or deep vein thrombosis rate No Different Than the National Rate Hospital score: 3.15 95% interval: 0.64 – 5.66 Sample size: 247 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_12 Postoperative acute kidney injury requiring dialysis rate No Different Than the National Rate Hospital score: 1.66 95% interval: 0.00 – 3.38 Sample size: 105 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_10 Postoperative respiratory failure rate No Different Than the National Rate Hospital score: 11.41 95% interval: 1.58 – 21.23 Sample size: 105 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_11 Postoperative sepsis rate No Different Than the National Rate Hospital score: 7.77 95% interval: 3.50 – 12.03 Sample size: 93 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_13 Pressure ulcer rate No Different Than the National Rate Hospital score: 0.46 95% interval: 0.00 – 1.60 Sample size: 761 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_03 CMS Medicare PSI 90: Patient safety and adverse events composite No Different Than the National Value Hospital score: 1.07 95% interval: 0.60 – 1.54 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_90 Postoperative wound dehiscence rate No Different Than the National Rate Hospital score: 1.74 95% interval: 0.22 – 3.26 Sample size: 43 Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_14 Catheter Associated Urinary Tract Infections (ICU + select Wards) Not Available Hospital score: — SIR Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: HAI_2_SIR Central Line Associated Bloodstream Infection (ICU + select Wards) Not Available Hospital score: — SIR Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: HAI_1_SIR MRSA Bacteremia Not Available Hospital score: — SIR Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: HAI_5_SIR SSI - Abdominal Hysterectomy Not Available Hospital score: — SIR Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: HAI_4_SIR SSI - Colon Surgery Not Available Hospital score: — SIR Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: HAI_3_SIR Death rate among surgical inpatients with serious treatable complications Number of Cases Too Small Hospital score: — Reporting period: 07/01/2022 – 06/30/2024 CMS measure id: PSI_04

Readmissions

Same as National Average

Measures how often patients return to the hospital within 30 days of discharge. Lower readmission rates suggest effective treatment and discharge planning.

Underlying measures: 30-day Readmission, Hip/Knee Replacement Better than expected Hospital score: 0.85 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: READM-30-HIP-KNEE-HRRP 30-day Readmission, COPD As expected Hospital score: 0.98 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: READM-30-COPD-HRRP 30-day Readmission, Heart Failure As expected Hospital score: 1.01 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: READM-30-HF-HRRP 30-day Readmission, Pneumonia As expected Hospital score: 0.96 Sample size: 109 Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: READM-30-PN-HRRP 30-day Readmission, Bypass Surgery Hospital score: — Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: READM-30-CABG-HRRP 30-day Readmission, Heart Attack Hospital score: — Reporting period: 07/01/2021 – 06/30/2024 CMS measure id: READM-30-AMI-HRRP

Patient Experience

Same as National Average

Based on the HCAHPS survey — patient satisfaction with communication, cleanliness, pain management, and discharge information.

Patient survey detail — the questions feeding the Patient Experience domain above expand ↓

CMS computes the Patient Experience domain from the federal HCAHPS survey. Each bar below is one survey question; the percentage is the share of Avera's recent patients who gave the most positive response. HCAHPS percentages aren't directly comparable across all measures — see the methodology page for how CMS weights them.

  • Communication with Nurses 82%
  • Communication with Doctors 76%
  • Hospital Cleanliness 80%
  • Hospital Quietness 65%
  • Staff Responsiveness N/A
  • Discharge Information 90%
  • Overall Hospital Rating (9 or 10) 69%
  • Would Recommend Hospital 61%

Percentages represent patients who gave the most positive response. Survey conducted by CMS through the HCAHPS program.

Timely & Effective Care

Better than National Average

Measures how quickly the hospital provides important treatments such as antibiotics for pneumonia or interventions for heart attacks.

Underlying measures: Average (median) time psychiatric/mental health patients spent in the emergency department before leaving from the visit. A lower number of minutes is better Better than ~75% of hospitals Hospital score: 152.00 min National median: 248.00 min (lower is better) Sample size: 457 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: OP_18c Left before being seen Better than ~75% of hospitals Hospital score: 1.00 % National median: 1.00 % (lower is better) Sample size: 8,559 Reporting period: 01/01/2024 – 12/31/2024 CMS measure id: OP_22 Appropriate care for severe sepsis and septic shock Better than ~75% of hospitals Hospital score: 81.00 % National median: 64.00 % (higher is better) Sample size: 151 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: SEP_1 Septic Shock 3-Hour Bundle Better than ~75% of hospitals Hospital score: 89.00 % National median: 72.00 % (higher is better) Sample size: 44 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: SEP_SH_3HR Severe Sepsis 3-Hour Bundle Better than ~75% of hospitals Hospital score: 91.00 % National median: 81.00 % (higher is better) Sample size: 151 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: SEV_SEP_3HR Endoscopy/polyp surveillance: appropriate follow-up interval for normal colonoscopy in average risk patients Near the national median Hospital score: 99.00 % National median: 97.00 % (higher is better) Sample size: 270 Reporting period: 01/01/2024 – 12/31/2024 CMS measure id: OP_29 Safe Use of Opioids - Concurrent Prescribing Near the national median Hospital score: 17.00 % National median: 15.00 % (lower is better) Sample size: 370 Reporting period: 01/01/2024 – 12/31/2024 CMS measure id: SAFE_USE_OF_OPIOIDS Average (median) time patients spent in the emergency department before leaving from the visit, excluding patients transferred to another facility or psychiatric care/mental health patients. A lower number of minutes is better Near the national median Hospital score: 129.00 min National median: 148.00 min (lower is better) Sample size: 6,811 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: OP_18b Average (median) time patients spent in the emergency department before being transferred to another facility. A lower number of minutes is better Near the national median Hospital score: 279.00 min National median: 294.00 min (lower is better) Sample size: 329 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: OP_18d Average (median) time all patients spent in the emergency department before leaving from the visit, including psychiatric/mental health patients and patients who were transferred to another facility. A lower number of minutes is better Near the national median Hospital score: 133.00 min National median: 154.00 min (lower is better) Sample size: 7,576 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: OP_18a Septic Shock 6-Hour Bundle Near the national median Hospital score: 93.00 % National median: 89.00 % (higher is better) Sample size: 30 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: SEP_SH_6HR Severe Sepsis 6-Hour Bundle Near the national median Hospital score: 93.00 % National median: 94.00 % (higher is better) Sample size: 76 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: SEV_SEP_6HR Healthcare workers given influenza vaccination Near the national median Hospital score: 84.00 % National median: 79.00 % (higher is better) Sample size: 633 Reporting period: 10/01/2024 – 03/31/2025 CMS measure id: IMM_3 Head CT results Worse than ~75% of hospitals Hospital score: 50.00 % National median: 74.00 % (higher is better) Sample size: 14 Reporting period: 07/01/2024 – 06/30/2025 CMS measure id: OP_23

Clinical Staff

Avera St. Mary's Hospital has 208 CMS-affiliated clinicians on its roster — physicians, advanced practice providers, and other Medicare-enrolled professionals who list this hospital as an affiliated facility.

Top specialties

  • Nurse Practitioner 41
  • Physician Assistant 20
  • Family Practice 17
  • Certified Registered Nurse Anesthetist (Crna) 16
  • Internal Medicine 14
  • Pathology 10
  • Pulmonary Disease 10
  • Hematology/Oncology 10

Self-reported primary specialty in the CMS Doctors & Clinicians dataset. Many clinicians serve multiple facilities.

Practice characteristics

Accept Medicare assignment
204 (98%)

Bill Medicare directly at the approved rate — patients only owe co-insurance/deductible.

Offer telehealth
45 (22%)

Indicated by the clinician in their CMS profile as routinely providing virtual visits.

Medicare quality scoring (MIPS)

14 of these clinicians have a published Merit-based Incentive Payment System (MIPS) final score. Of those, 6 (43%) score above the national median of 85.5.

MIPS scoring is heavily compressed at the top of the 0–100 range, so individual scores are not a reliable consumer signal. We surface roster-level coverage and the share above the national median instead.

Source: CMS Doctors and Clinicians (Care Compare) national downloadable file and MIPS Performance Year final scores, as of 2026-07-18. Affiliations from the CMS Facility Affiliations dataset. About 16% of small facilities (critical access, rural emergency, freestanding psych, IRF/LTCH) do not appear in the affiliations file and therefore have no panel.

Find a Doctor

Search the 208 clinicians affiliated with Avera St. Mary's Hospital. Each name links to that clinician's official Medicare Care Compare profile, where you can see their credentials, secondary specialties, group affiliations, and (when applicable) MIPS quality scores.

Showing 30 of 208 clinicians (alphabetical)

Roster from CMS Doctors and Clinicians (Care Compare), updated 2026-07-18. A clinician may also practice at other facilities; "affiliated" means this hospital is on their CMS profile, not that they exclusively work here. Procedure volumes are Medicare fee-for-service counts from the CMS clinician utilization file (all practice locations, not just this hospital). Industry payment totals are from CMS Open Payments, program year 2024, and include meals, travel, consulting, and speaking fees; payments are legal and common — we show them for transparency, not as a quality judgment.

Pricing & Costs

Facility Information

Licensed beds
60
Facility type
Acute Care Hospitals
Ownership
Voluntary non-profit - Private
Emergency services
Yes — 24/7

Ownership & Finances

Ownership
Nonprofit (Church-affiliated)
Charity care spend (FY2023)
$2.8M
List prices vs. actual cost
≈ 4.1× actual cost

From the hospital's FY2023 Medicare cost report (HCRIS).

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How Avera St. Mary's Hospital compares nearby

Compared with the 8 other acute-care hospitals within 100 miles — 9 facilities in all, CMS data only.

Among the 9 acute-care hospitals within 100 miles, CMS rates Avera St. Mary's Hospital's mortality about the same as the national average; the median among the 8 peers reporting it is about the same as the national average.

Measure This facility Nearby median Best nearby
Mortality reported by 8 of 8 nearby peers Same as National Average Same as National Average Same as National Average

The comparison group

Cohort: within 100 miles · CMS data period 2026-06 · method cohort-v1 · comparisons are never affected by claiming or payment. How nearby comparisons work

Compare this hospital with another →

Skilled nursing facilities nearby

For planning care after discharge — CMS five-star ratings shown; always confirm availability and coverage with the facility and your insurer.

About this data

Quality and ratings data are sourced from the U.S. Centers for Medicare & Medicaid Services (CMS) Hospital Compare program. Star ratings are CMS's own calculation; CareRanks does not modify or re-weight them. Facility-level details (address, beds, ownership, teaching status) come from CMS provider files and the CMS Provider of Services file.

Pricing data, where shown, is drawn from the hospital's own Machine-Readable File (MRF) published under the federal Hospital Price Transparency Rule. See our methodology for the full update cadence and limitations.

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