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

Dr. Janusz J Madej, MD

Individual provider Internal Medicine Physician · NPI 1376616706

Dr. Janusz J Madej, MD is an Internal Medicine Physician in Los Altos, California. Practices as a sole proprietor and works from 2 locations. Licensed in California.

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 →

Practice location Address checks out

339 S San Antonio Rd Ste 1A
Los Altos, CA 94022-3699
Phone: (650) 529-1669
Fax: (650) 529-1670
Show map & directions

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

Additional practice locations (1)

  • 3130 Alpine Rd., Portola Valley, CA 94028 — (650) 529-1669

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A69531 (CA)

Record details

NPI number1376616706
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 15, 2006
Last updated in NPPESMarch 30, 2024
Certification dateMarch 30, 2024

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