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

Dr. Ivan Y Lee, MD

Individual provider Internal Medicine Physician · NPI 1366431348

Dr. Ivan Y Lee, MD is an Internal Medicine Physician in Hayward, California. Licensed in California. Registered with an NPI since 2005.

Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

27001 Calaroga Ave #5
Hayward, CA 94545-4345
Phone: (510) 783-6444
Fax: (510) 783-6446
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 G80771 (CA)

Record details

NPI number1366431348
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 21, 2005
Last updated in NPPESJanuary 15, 2014
Mailing address27001 Calaroga Ave, 5, Hayward, CA 94545-4345

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