Clarissa G. Barnes, MD

Medicare activity in 2024

Official CMS public-use data for Clarissa G. Barnes, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)216 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)89 services
3. Hospital discharge day management, 30 minutes or less (99238)48 services
4. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)27 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Arthritis57%
• Chronic kidney disease51%
• Heart failure47%
• Ischemic heart disease44%

Hospitals where Clarissa G. Barnes works

Medicare's Facility Affiliation Data lists Clarissa G. Barnes at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Avera Marshall Regional Medical CenterMarshall, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241359
• Avera McKennan Hospital & University Health CenterSioux Falls, SD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 430016
• North Memorial Health HospitalRobbinsdale, MN · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 240001

Practice locations

Addresses where Clarissa G. Barnes is enrolled with Medicare (CMS data updated October 2, 2026).

• 1325 S Cliff AveSioux Falls, SD 57105
• 1325 S Cliff Ave, RadiologySioux Falls, SD 57105 (605) 322‑4878
• 300 W 5th StMiller, SD 57362 (605) 853‑0158
• 901 E Virgil AveMilbank, SD 57252

Group practices

Medicare enrollment lists Clarissa G. Barnes as a member of this group (CMS data updated October 2, 2026).

• Avera McKennan959 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in South Dakota →

Other internal medicine doctors in Sioux Falls

Clinicians with the same Medicare primary specialty in Sioux Falls, SD — not a recommendation.

• Obinna E. Nwadibia, MD
• Liesl K. Pavlic, MD
• Chetan J. Wasekar, MD
• Spencer Schilling, MD
• David C. Nelson, MD
• Mahmoud Alsaiqali, MD
• Ryan J. Miller, MD
• Nicholas F. Kaufman, MD

All internal medicine doctors in Sioux Falls →

Other clinicians in Avera McKennan

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Rachel A. Erdman
• Kelsey Ledeboer, CNA
• Gregg A. Harvison, MD
• Matthew R. Frank, MD
• Taylar B. Hash
• Michael P. Stotz, DO

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians