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

Ruwan Gunaratne, MD

Individual provider Medical Oncology Physician · NPI 1538664461

Ruwan Gunaratne, MD is a Hematology/Oncology in Stanford, California. Graduated from Duke University School of Medicine in 2018, 8 years ago. Practices with Stanford Health Care, a 3,085-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
8
Trained at
Duke University School of Medicine
Licensed in
CA
In the registry since
2018
Specialties on file
5
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.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence A163648 (CA)
Medical Oncology Physician Taxonomy 207RX0202X · Licence A163648 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A163648 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence A163648 (CA)

Record details

NPI number1538664461
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 23, 2018
Last updated in NPPESJanuary 27, 2026
Certification dateJanuary 27, 2026

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolDUKE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2018 (8 years in practice)
Group practice Stanford Health Care — 3085 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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