Joseph W. Tsen, M.D.
Family Medicine Physician · Seattle, WA
Joseph W. Tsen, M.D. is a family medicine physician with a practice address in Seattle, Washington, and NPI 1770575573, issued on Aug 17, 2005. Check the license (Washington MD00019279, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Joseph W. Tsen
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD00019279 WA
Self-reported in NPPES; status is on the state search - Practice location
- 12510 33RD Ave. N.E., Seattle, WA 98125
- Phone
- (206) 364-8787
- Enumerated
- Aug 17, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (206) 364-8787
- Medicaid ID
- 1002492 WA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Verify Joseph W. Tsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00019279Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average family medicine physician in 2024
17 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Joseph W. Tsen among 5,534 family medicine physician records in Washington
Joseph W. Tsen, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2026 · 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
- Ian Bennett, MD PHDSeattle, WA 981251992740518
- Dean Chier, M.D.Seattle, WA 981251962564724
- David Clemens, M.D.Seattle, WA 981251558353227
- David Evans, MDSeattle, WA 981251558316216
- Emily Godfrey, M.D. M.P.H.Seattle, WA 981251437260551
- Paul James, MDSeattle, WA 981251366438947
- Misbah Keen, MDSeattle, WA 981251437236502
- Patricia Lewis, MDSeattle, WA 981251619925914
Common questions
What is Joseph W. Tsen, M.D.'s NPI number?
Joseph W. Tsen, M.D.'s National Provider Identifier (NPI) is 1770575573, issued on Aug 17, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph W. Tsen, M.D. located?
The NPPES record lists a practice address at 12510 33RD Ave. N.E., Seattle, WA, 98125. Phone: (206) 364-8787. Providers update this record themselves, so call before visiting.
How can I verify Joseph W. Tsen, M.D.'s license?
NPPES lists Washington license number MD00019279, 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 Joseph W. Tsen, M.D. prescribe under Medicare Part D?
In 2024, Joseph W. Tsen, M.D. had 17 Medicare Part D claims; 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.