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

Wei-Fang Ko, MD

Individual provider Gastroenterology Physician · NPI 1417068081

Wei-Fang Ko, MD is a Gastroenterology in Castro Valley, California. Qualified in 1986, 40 years ago. Practices with Gastroenterology Specialists Medical Group Inc a Medical Corporation, a 5-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
40
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

19845 Lake Chabot Rd Ste 104
Castro Valley, CA 94546-4055
Phone: (510) 537-4415
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A62022 (CA)

Record details

NPI number1417068081
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 31, 2006
Last updated in NPPESAugust 1, 2022
Certification dateAugust 1, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Group practice Gastroenterology Specialists Medical Group Inc A Medical Corporation — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Castro Valley