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Eugene Chan, MD
NPI 1528146610 · Gastroenterology Physician · Walnut Creek, CA
Eugene Chan, MD is a Gastroenterology Physician provider in Walnut Creek, CA (NPI 1528146610).
Provider details
- NPI number
- 1528146610
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G53188 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
1425 S Main St
Walnut Creek, CA 94596-5318
Phone: (925) 295-4000
Street-level locationGet directions
Mailing address
1800 Harrison St Fl 7
Oakland, CA 94612-3429
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is Eugene Chan's NPI number?
- Eugene Chan's National Provider Identifier (NPI) is 1528146610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eugene Chan's specialty?
- Eugene Chan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Eugene Chan located?
- Eugene Chan's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is Eugene Chan's phone number?
- The practice phone number listed in the NPPES registry for Eugene Chan is (925) 295-4000.
- Is Eugene Chan's NPI active?
- Yes — Eugene Chan's NPI (1528146610) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.