Seng-Ian Gan, M.D.
NPI 1700833498 · Gastroenterology Physician · Seattle, WA
Seng-Ian Gan, M.D. is a Gastroenterology Physician provider in Seattle, WA (NPI 1700833498).
Provider details
- NPI number
- 1700833498
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 222765 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-28
- Last updated
- 2012-11-16
Frequently asked questions
- What is Seng-Ian Gan's NPI number?
- Seng-Ian Gan's National Provider Identifier (NPI) is 1700833498, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Seng-Ian Gan's specialty?
- Seng-Ian Gan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Seng-Ian Gan located?
- Seng-Ian Gan's practice location on file with NPPES is 1100 9th Ave, Seattle, WA 98101-2756.
- What is Seng-Ian Gan's phone number?
- The practice phone number listed in the NPPES registry for Seng-Ian Gan is (206) 223-6600.
- Is Seng-Ian Gan's NPI active?
- Yes — Seng-Ian Gan's NPI (1700833498) is active in the NPPES registry as of the last update on 2012-11-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.