Curtis L. Frewin, MD

Medicare activity in 2024

Official CMS public-use data for Curtis L. Frewin, 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. Imaging of retina (92134)389 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)335 services
3. Measurement of corneal curvature and depth of eye (92136)254 services
4. Removal of cataract with insertion of prosthetic lens (66984)226 services
5. Injection of drug into eye (67028)183 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 pressure67%
• High cholesterol60%
• Arthritis43%
• Diabetes28%
• Depression27%
• Ischemic heart disease21%

Hospitals where Curtis L. Frewin works

Medicare's Facility Affiliation Data lists Curtis L. Frewin 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.

• Billings Clinic HospitalBillings, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270004
• Intermountain Health St Vincent Regional HospitalBillings, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270049
• Powell Valley HospitalPowell, WY · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 531310

Practice locations

Addresses where Curtis L. Frewin is enrolled with Medicare (CMS data updated October 2, 2026).

• 2800 10th Ave NBillings, MT 59101 (406) 657‑4000

Group practices

Medicare enrollment lists Curtis L. Frewin as a member of this group (CMS data updated October 2, 2026).

• Billings Clinic Specialty Supplies and Services, LLC824 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in Montana →

Other ophthalmologists in Billings

Clinicians with the same Medicare primary specialty in Billings, MT — not a recommendation.

• David W. Switzer Jr., MD
• Clifford J. Goodrich, MD
• Cullen D. Ryburn, MD
• Ryan Frisbie, MD
• Matthew T. Gregory, MD
• James T. Priddy, MD
• Michael H. Power, MD
• Russell Swan, MD

All ophthalmologists in Billings →

Other clinicians in Billings Clinic Specialty Supplies and Services, LLC

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

• Steven J. Kriner, DO
• Aaron R. Furchner, PA
• David Stordahl, MD
• Harshvardhan Rajen, MD
• Nicole Philips, MD
• James A. Jackson, MD

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