Nancy Henderson Chaffee, M.D.
Internal Medicine Physician · Mount Vernon, WA
Nancy Henderson Chaffee, M.D. is an internal medicine physician with a practice address in Mount Vernon, Washington, and NPI 1467604231, issued on Oct 10, 2008. Check the license (Washington 25240, as entered in NPPES) on the Washington Medical Commission; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Nancy Henderson Chaffee
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 25240 WA
30096 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 307 S 13TH St, Mount Vernon, WA 98274
- Phone
- (360) 848-8500
- Enumerated
- Oct 10, 2008
- Record last updated
- Feb 26, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (360) 419-3700
- Entity
- Type 1 · individual
Also registered at 307 S 13TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nancy Henderson Chaffee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license 25240Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33 internal medicine physician records list a practice address in Mount Vernon
They are 33 of the 1,500 NPPES records with a practice address in Mount Vernon, and 3,079 internal medicine physician records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 33 in Mount Vernon → All 3,079 in Washington → Every provider in Mount Vernon →
Other internal medicine physician records in Washington
- Sheida Aalami, M.D.Seattle, WA1730573296
- Gloria AbacanProsser, WA1316040298
- Ahmad Abadullah, MDUniversity Place, WA1225005721
- Rebecca AbaySeattle, WA1528565520
- Naseer Abbas, MDTacoma, WA1962769380
- James Abbey, M.D.Anacortes, WA1447646039
- Joel Abbott, D.O.Tacoma, WA1477752723
- Paul Abdallah, MDSeattle, WA1639166119
- Abir Abdel-Kader, MDRichland, WA1649407081
- Hussein Abdille, MDSeattle, WA1588368831
Common questions
What is Nancy Henderson Chaffee, M.D.'s NPI number?
Nancy Henderson Chaffee, M.D.'s National Provider Identifier (NPI) is 1467604231, issued on Oct 10, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Henderson Chaffee, M.D. located?
The NPPES record lists a practice address at 307 S 13TH St, Mount Vernon, WA, 98274. Phone: (360) 848-8500. Providers update this record themselves, so call before visiting.
How can I verify Nancy Henderson Chaffee, M.D.'s license?
NPPES lists Washington license number 25240, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.