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

Helen Woohee Yang, MD

Individual provider Internal Medicine Physician · NPI 1003270877

Helen Woohee Yang, MD is an Internal Medicine in Castro Valley, California. Qualified in 2016, 10 years ago. Practices with Alameda Health System, a 601-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
10
Licensed in
CA
In the registry since
2016
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

20642 John Dr
Castro Valley, CA 94546-5103
Phone: (510) 806-2100
Fax: (323) 226-2657
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A153680 (CA)

Record details

NPI number1003270877
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 7, 2016
Last updated in NPPESApril 29, 2024
Certification dateApril 29, 2024
Mailing address20642 John Dr, Castro Valley, CA 94546-5103

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Alameda Health System — 601 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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