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

Stefano Testa, MD

Individual provider Internal Medicine Physician · NPI 1801424437

Stefano Testa, MD is an Internal Medicine in Stanford, California. Qualified in 2018, 8 years ago. Works from 2 locations. Licensed in California.

Years since qualifying
8
Licensed in
CA
In the registry since
2020
Specialties on file
3
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

300 Pasteur Dr
Stanford, CA 94305-2200
Phone: (650) 723-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 900 Blake Wilbur Dr, Palo Alto, CA 94304-2201 — (650) 723-6661

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence A207384 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A207384 (CA)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence A207384 (CA)

Record details

NPI number1801424437
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 30, 2020
Last updated in NPPESJuly 1, 2026
Certification dateJuly 1, 2026
Mailing address300 Pasteur Dr, Stanford, CA 94305-2200

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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