Eileen Frelier, MD
NPI 1275639833 · Internal Medicine Physician · Bozeman, MT
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eileen Frelier, MD is a Internal Medicine Physician provider in Bozeman, MT (NPI 1275639833).
Provider details
- NPI number
- 1275639833
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- M7570 (ID)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is Eileen Frelier's NPI number?
- Eileen Frelier's National Provider Identifier (NPI) is 1275639833, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eileen Frelier's specialty?
- Eileen Frelier is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eileen Frelier located?
- Eileen Frelier's practice location on file with NPPES is 300 N Willson Ave Ste 703g, Bozeman, MT 59715-3551.
- What is Eileen Frelier's phone number?
- The practice phone number listed in the NPPES registry for Eileen Frelier is (406) 522-8923.
- Does Eileen Frelier accept Medicare?
- Eileen Frelier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eileen Frelier's NPI active?
- Yes — Eileen Frelier's NPI (1275639833) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.