William Ferril, MD
NPI 1285737635 · General Practice Physician · Whitefish, MT
William Ferril, MD is a General Practice Physician provider in Whitefish, MT (NPI 1285737635).
Provider details
- NPI number
- 1285737635
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 5332 (MT)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Potassium Chloride | 63 | 19 |
| Levothyroxine Sodium | 40 | — |
| Levothyroxine Sodiumbrand: Synthroid | 23 | — |
| Prednisone | 20 | — |
| Metformin Hcl | 19 | — |
| Hydrochlorothiazide | 16 | — |
| Hydrocortisone | 14 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-07
- Last updated
- 2007-07-09
Frequently asked questions
- What is William Ferril's NPI number?
- William Ferril's National Provider Identifier (NPI) is 1285737635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ferril's specialty?
- William Ferril is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is William Ferril located?
- William Ferril's practice location on file with NPPES is 550 a Central Ave, Whitefish, MT 59937.
- What is William Ferril's phone number?
- The practice phone number listed in the NPPES registry for William Ferril is (406) 862-3308.
- Is William Ferril's NPI active?
- Yes — William Ferril's NPI (1285737635) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.