Curtis Frewin, M.D.
NPI 1790977262 · Ophthalmology Physician · Billings, MT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Curtis Frewin, M.D. is a Ophthalmology Physician provider in Billings, MT (NPI 1790977262).
Provider details
- NPI number
- 1790977262
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 11556 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,239 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Imaging of Retina92134 | 389 | $24 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 335 | $93 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 254 | $29 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 226 | $509 |
| Injection of Drug Into Eye67028 | 183 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 183 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 514 | 261 |
| Ketorolac Tromethamine | 490 | 249 |
| Latanoprost | 257 | 57 |
| Moxifloxacin Hclbrand: Moxifloxacin | 251 | 175 |
| Brimonidine Tartrate | 118 | 33 |
| Ofloxacin | 94 | 68 |
| Timolol Maleate | 75 | 21 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-17
- Last updated
- 2017-03-16
Frequently asked questions
- What is Curtis Frewin's NPI number?
- Curtis Frewin's National Provider Identifier (NPI) is 1790977262, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Curtis Frewin's specialty?
- Curtis Frewin is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Curtis Frewin located?
- Curtis Frewin's practice location on file with NPPES is 801 N 29th St, Billings, MT 59101-0905.
- What is Curtis Frewin's phone number?
- The practice phone number listed in the NPPES registry for Curtis Frewin is (406) 238-2500.
- Does Curtis Frewin accept Medicare?
- Curtis Frewin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Curtis Frewin's NPI active?
- Yes — Curtis Frewin's NPI (1790977262) is active in the NPPES registry as of the last update on 2017-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.