Colin Daniel Fields, M.D.
Family Medicine Physician · Seattle, WA
Colin Daniel Fields, M.D. is a family medicine physician with a practice address in Seattle, Washington, and NPI 1902123896, issued on May 1, 2010. Check the license (Washington MD60305677, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Colin Daniel Fields
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD60305677 WA
Self-reported in NPPES; status is on the state search - Practice location
- 125 16TH Ave E, Seattle, WA 98112
- Phone
- (206) 326-3000
- Enumerated
- May 1, 2010
- Record last updated
- Feb 3, 2025
- Medicare enrollment
- Enrolled (PECOS I20131106001306); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 125 16TH Ave E
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Colin Daniel Fields in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60305677Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average family medicine physician in 2024
722 Medicare Part D claims for 66 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 51% of claims.
Most prescribed
- Biktarvy141 claims
- Dovato47 claims
- Darunavir46 claims
- Ritonavir42 claims
- Isentress25 claims
- Efavirenz-Emtric-Tenofov Disop24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF WashingtonSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Colin Daniel Fields among 5,534 family medicine physician records in Washington
Colin Daniel Fields, M.D. is one of 5,534 family medicine physician records with a practice address in Washington. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 59% of them.
- NPI issued2010 · 59% of these records are older, 38% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2010 · median 2009 among the 3,294 with a school on file
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
871 family medicine physician records list a practice address in Seattle
They are 871 of the 41,956 NPPES records with a practice address in Seattle, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Seattle → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Stetson Aman, M.D.Seattle, WA 981121700987476
- Holly Bays, MDSeattle, WA 981121457462756
- Mei Castor, MDSeattle, WA 981121093783037
- Helen Chernicoff, MDSeattle, WA 981121881707925
- Mary CurielSeattle, WA 981121154309300
- Daniel Herman, MDSeattle, WA 981121205850369
- Sarah Hufbauer, MDSeattle, WA 981121154308377
- Richard Kovar, MDSeattle, WA 981121538146832
Common questions
What is Colin Daniel Fields, M.D.'s NPI number?
Colin Daniel Fields, M.D.'s National Provider Identifier (NPI) is 1902123896, issued on May 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Colin Daniel Fields, M.D. located?
The NPPES record lists a practice address at 125 16TH Ave E, Seattle, WA, 98112. Phone: (206) 326-3000. Providers update this record themselves, so call before visiting.
How can I verify Colin Daniel Fields, M.D.'s license?
NPPES lists Washington license number MD60305677, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Colin Daniel Fields, M.D. prescribe under Medicare Part D?
In 2024, Colin Daniel Fields, M.D. had 722 Medicare Part D claims for 66 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.