Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Seng-Ian Gan, MD

Individual provider Gastroenterology Physician · NPI 1700833498

Seng-Ian Gan, MD is a Gastroenterology Physician in Seattle, Washington. Licensed in Massachusetts and Washington. Registered with an NPI since 2006.

Licensed in
MA, WA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1100 9th Ave
Seattle, WA 98101-2756
Phone: (206) 223-6600
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD60027255 (WA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 222765 (MA)

Record details

NPI number1700833498
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 28, 2006
Last updated in NPPESNovember 16, 2012
Mailing address1100 9th Ave, Seattle, WA 98101-2756

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