Seng-Ian Gan, M.D.
Gastroenterology Physician · Seattle, WA
Seng-Ian Gan, M.D. is a gastroenterology physician with a practice address in Seattle, Washington, and NPI 1700833498, issued on May 28, 2006. Check the license (Washington MD60027255, as entered in NPPES) on the Washington Medical Commission; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Seng-Ian Gan
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- MD60027255 WA
222765 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 9TH Ave, Seattle, WA 98101
- Phone
- (206) 223-6600
- Enumerated
- May 28, 2006
- Record last updated
- Nov 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 8527560 WA
- Entity
- Type 1 · individual
Also registered at 1100 9TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barry Aaronson, MDHospitalist Physician1952418345
- David Aboulafia, MDHematology & Oncology Physician1043269392
- Deborah Abrams, M.D.Hematology & Oncology Physician1902974835
- Alvin Aceron, ARNPAdult Health Nurse Practitioner1639488562
- Ream AdeebAdult Health Nurse Practitioner1760868855
- Steven Adler, MDDiagnostic Ultrasound Physician1639108046
Verify Seng-Ian Gan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60027255Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gastroenterology Physician providers in Washington
There are 533 gastroenterology physician records in Washington. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other gastroenterology physician records in Washington
- Abimbola AdikePoulsbo, WA1821357112
- Abhishek Agarwal, MDPuyallup, WA1801010053
- Gaurav Aggarwal, M.D.Bellevue, WA1902083587
- Sanjay Agrawal, M.D.Tacoma, WA1710912894
- Ehsaan Akhtar, MDKirkland, WA1710255591
- Oviea Akpotaire, MDSeattle, WA1649632936
- Steven Alabaster, MDTacoma, WA1801869623
- Sankar Alagugurusamy, MDMount Vernon, WA1093970576
- Hawwa Alao, MDSeattle, WA1376774752
- Nouredin Alebouyeh, M.D.Seattle, WA1144454711
Common questions
What is Seng-Ian Gan, M.D.'s NPI number?
Seng-Ian Gan, M.D.'s National Provider Identifier (NPI) is 1700833498, issued on May 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Seng-Ian Gan, M.D. located?
The NPPES record lists a practice address at 1100 9TH Ave, Seattle, WA, 98101. Phone: (206) 223-6600. Providers update this record themselves, so call before visiting.
How can I verify Seng-Ian Gan, M.D.'s license?
NPPES lists Washington license number MD60027255, 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.