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

Robert Blair Ash, MD

Individual provider Radiation Oncology Physician · NPI 1326238650

Robert Blair Ash, MD is a Radiation Oncology in Orange, California. Qualified in 1995, 31 years ago. Practices with City of Hope Medical Foundation, a 959-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
31
Licensed in
CA
In the registry since
2007
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

1000 W Laveta Ave
Orange, CA 92868
Phone: (714) 734-6250
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1100 West Stewart Drive, Orange, CA 92868 — (714) 771-8153

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence C52450 (CA)

Record details

NPI number1326238650
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 1, 2007
Last updated in NPPESNovember 11, 2020
Certification dateNovember 11, 2020
Mailing addressPo Box 512185, Los Angeles, CA 90051-0185

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice City Of Hope Medical Foundation — 959 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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