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

Dr. Martin F. Stein, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1871901397

Dr. Martin F. Stein, MD is an Endocrinology, Diabetes & Metabolism Physician in Portola Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2014
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

145 Deer Meadow Ln
Portola Valley, CA 94028-7608
Phone: (650) 529-1786
Fax: (650) 529-1786
Show map & directions

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

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence C26329 (CA)

Record details

NPI number1871901397
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 28, 2014
Last updated in NPPESJuly 28, 2014