Colin Fields, M.D.
NPI 1902123896 · Family Medicine Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colin Fields, M.D. is a Family Medicine Physician provider in Seattle, WA (NPI 1902123896).
Provider details
- NPI number
- 1902123896
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD60305677 (WA)
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
16 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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 141 | 21 |
| Dolutegravir Sodium/Lamivudinebrand: Dovato | 47 | — |
| Darunavir | 46 | — |
| Ritonavir | 42 | — |
| Raltegravir Potassiumbrand: Isentress | 25 | — |
| Efavirenz/Emtricit/Tenofovr Dfbrand: Efavirenz-Emtric-Tenofov Disop | 24 | — |
| Elviteg/Cob/Emtri/Tenof Alafenbrand: Genvoya |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-05-01
- Last updated
- 2025-02-03
- Certified
- 2025-02-03
Frequently asked questions
- What is Colin Fields's NPI number?
- Colin Fields's National Provider Identifier (NPI) is 1902123896, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colin Fields's specialty?
- Colin Fields is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Colin Fields located?
- Colin Fields's practice location on file with NPPES is 125 16th Ave E, Seattle, WA 98112-5211.
- What is Colin Fields's phone number?
- The practice phone number listed in the NPPES registry for Colin Fields is (206) 326-3000.
- Does Colin Fields accept Medicare?
- Colin Fields is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colin Fields's NPI active?
- Yes — Colin Fields's NPI (1902123896) is active in the NPPES registry as of the last update on 2025-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.