Kelly J. Underhill, MD

Medicare activity in 2024

Official CMS public-use data for Kelly J. Underhill, 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. Ct guidance for insertion of radiation therapy fields (77014)553 services
2. Calculation of radiation therapy dose (77300)176 services
3. Radiation treatment management, 5 treatment sessions (77427)124 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)107 services
5. Design and construction of complex radiation treatment device (77334)106 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).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High blood pressure74%
• High cholesterol70%
• Arthritis36%
• Ischemic heart disease28%
• Diabetes27%

Hospitals where Kelly J. Underhill works

Medicare's Facility Affiliation Data lists Kelly J. Underhill 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.

• Benefis Hospitals IncGreat Falls, MT · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 270012
• Great Falls Clinic HospitalGreat Falls, MT · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 270086

Practice locations

Addresses where Kelly J. Underhill is enrolled with Medicare (CMS data updated October 2, 2026).

• 1509 29th St SGreat Falls, MT 59405 (406) 771‑3500
• 3000 15th Ave SGreat Falls, MT 59405 (406) 454‑2171
• 3010 15th Ave SGreat Falls, MT 59405 (406) 216‑8000

Group practices

Medicare enrollment lists Kelly J. Underhill as a member of this group (CMS data updated October 2, 2026).

• CMSC LLC91 clinicians in the group

Specialties

• Radiation Oncologyprimary

Find other Radiation Oncology doctors in Montana →

Other radiation oncologists in Montana

Clinicians with the same Medicare primary specialty in Montana — not a recommendation.

• Joseph W. Clyde, MD
• Carolyn Rutter, MD
• Margaret M. Menendez, MD
• Ralf K. Kiehl, MD
• Susan M. Hong, MD
• Christopher B. Baker, MD
• Trent D. Mihalick, MD
• Jeffrey A. Stephenson, MD

All radiation oncologists in Montana →

Other clinicians in CMSC LLC

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

• Michael Flores, MD
• Michael L. Sarkees, MD
• Lisa Yeary, CNA
• Scott J. Venable, CNA
• Lori Leslie, CNA
• Shana D. Eaglefeathers, 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