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

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