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Wei-Fang Ko, M.D.

Gastroenterology Physician in Castro Valley, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417068081

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Registry record

Entity type Individual (Type 1)
Name Wei-Fang Ko
Credential M.D.
Sex Male
Practice address 19845 Lake Chabot Rd, Suite, 104, Castro Valley, CA, 94546
Phone (510) 537-4415
Enumeration date Aug 31, 2006
Last updated in NPPES Aug 1, 2022

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License A62022 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
ZZZ25407Z Other CA SERVICE LOCATIONS WITH ZIP 94545
ZZZ25408Z Other CA SERVICE LOCATION ZIPCODE 94546 AND 94541

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Wei-Fang Ko practice?
The practice location on file with NPPES is in Castro Valley, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Wei-Fang Ko?
The National Provider Identifier (NPI) for Wei-Fang Ko is 1417068081, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-01.