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

Dr. Robert D Hesselgesser, MD

Individual provider Radiation Oncology Physician · NPI 1710979687

Dr. Robert D Hesselgesser, MD is a Radiation Oncology in Orange, California. Graduated from New York Medical College in 1971, 55 years ago. Practices with Golden State Radiation Oncology, Inc, a 2-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California, Indiana and Michigan.

Years since qualifying
55
Trained at
New York Medical College
Licensed in
CA, IN, MI
In the registry since
2005
Specialties on file
4
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

101 The City Dr S
Orange, CA 92868-3201
Phone: (714) 880-7812
Show map & directions

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

Additional practice locations (1)

  • 21300 Erwin St, Woodland Hills, CA 91367-3717 — (818) 449-2700

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence G22896 (CA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 4301115702 (MI)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 01081578A (IN)
Therapeutic Radiology Physician Taxonomy 2085R0203X · Licence 4301115702 (MI)

Record details

NPI number1710979687
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 17, 2005
Last updated in NPPESJanuary 17, 2023
Certification dateJanuary 17, 2023

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1971 (55 years in practice)
Group practice Golden State Radiation Oncology, Inc. — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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