NPPES file of Aug 9, 2026

Louis C. Chen, M.D.

Endocrinology, Diabetes & Metabolism Physician · Seattle, WA

Louis C. Chen, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Seattle, Washington, and NPI 1609968510, issued on Sep 28, 2006. Check the license (Washington MD60201014, as entered in NPPES) on the Washington Medical Commission; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1609968510
Name
Louis C. Chen
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License numbers
MD60201014 WA
A79663 CA
Self-reported in NPPES; status is on the state search
Practice location
1100 9TH Ave, Seattle, WA 98101
Phone
(206) 223-6620
Enumerated
Sep 28, 2006
Record last updated
Jun 18, 2011 (not updated in 15 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest endocrinology, diabetes & metabolism physician records → All 224 in Washington → Look up another NPI →

Also registered at 1100 9TH Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Barry Aaronson, MDHospitalist Physician1952418345
  2. David Aboulafia, MDHematology & Oncology Physician1043269392
  3. Deborah Abrams, M.D.Hematology & Oncology Physician1902974835
  4. Alvin Aceron, ARNPAdult Health Nurse Practitioner1639488562
  5. Ream AdeebAdult Health Nurse Practitioner1760868855
  6. Steven Adler, MDDiagnostic Ultrasound Physician1639108046

Verify Louis C. Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWashington Medical Commission
    Search for license MD60201014    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Washington license search

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Louis C. Chen among 224 endocrinology, diabetes & metabolism physician records in Washington

Louis C. Chen, M.D. is one of 224 endocrinology, diabetes & metabolism physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.

  • NPI issued2006 · 6% of these records are older, 55% newer
  • In a Medicare fileNo · 75% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2011 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in Washington

There are 224 endocrinology, diabetes & metabolism physician records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 224 in Washington → Every provider in Seattle → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Iram Ahmad, M.D.Seattle, WA 981011730319484
  2. Grace Lee, M.D.Seattle, WA 981011033185137
  3. Christine LeeSeattle, WA 981011164842381
  4. Jacob Lloyd, MDSeattle, WA 981011659998268
  5. Robert Mecklenburg, MDSeattle, WA 981011447268545
  6. Gal Omry Orbach, M.D.Seattle, WA 981011992988935
  7. Frances Broyles, MDSeattle, WA 981041669454583
  8. Matthew Davies, MDSeattle, WA 981041902892680

Common questions

What is Louis C. Chen, M.D.'s NPI number?

Louis C. Chen, M.D.'s National Provider Identifier (NPI) is 1609968510, issued on Sep 28, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Louis C. Chen, M.D. located?

The NPPES record lists a practice address at 1100 9TH Ave, Seattle, WA, 98101. Phone: (206) 223-6620. Providers update this record themselves, so call before visiting.

How can I verify Louis C. Chen, M.D.'s license?

NPPES lists Washington license number MD60201014, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.