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

Dr. Iain Jacob Macewan, MD

Individual provider Radiation Oncology Physician · NPI 1326300401

Dr. Iain Jacob Macewan, MD is a Radiation Oncology in San Diego, California. Graduated from University of California, San Diego School of Medicine in 2012, 14 years ago. Practices with Proton Doctors Professional Corporation, a 13-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
14
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2012
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

9730 Summers Ridge Rd
San Diego, CA 92121-3101
Phone: (858) 822-4048
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence A129079 (CA)

Record details

NPI number1326300401
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2012
Last updated in NPPESJuly 25, 2022
Certification dateJuly 25, 2022

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 2012 (14 years in practice)
Group practice Proton Doctors Professional Corporation — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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