Dr. Robert Hesselgesser, MD

Dr. Robert Hesselgesser, MD

Radiation Oncology  |  
Male  |  
72 y/o

Accepting new patients

Dr. Robert Hesselgesser, MD is a radiation oncology specialist in Thousand Oaks, CA and has been practicing for 43 years. He graduated from New York Medical College in 1971 and specializes in radiation oncology and radiology.

21st Century Radiation Oncology

2230 Lynn Rd Ste 103

Thousand Oaks, CA 91360
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Accepted insurance

  • Aetna
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield of California
  • Blue Shield of California
  • Cigna
  • MultiPlan

Learn about Dr. Hesselgesser

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Top Care Areas


See how frequently Dr. Hesselgesser performs your care needs compared to other doctors.

more than 83% of peers

Dr. Hesselgesser's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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  • Radiation Oncology
  • Radiology

Board Certifications

  • Therapeutic Radiology
    Accredited by: American Board of Radiology*

Conditions Treated

Background Check

0 Malpractice Claims

No malpractice history found for California.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • New York Medical College
    Medical School | Graduated 1971
  • Los Angeles County University Of California Med Center
    Internship Hospital | Completed 1972
  • Los Angeles County University Of California Med Center
    Residency Hospital | Completed 1975

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Hesselgesser has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. Hesselgesser does not have any memberships or affiliations listed. If you are Dr. Hesselgesser and would like to add memberships or affiliations, please update your profile.

Dr. Hesselgesser's Reviews

Likelihood of recommending Dr. Hesselgesser to family and friends
based on 7 total reviews (3 with comments)

Likelihood to Recommend (7)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Hesselgesser's Performance

Explains condition(s) well
Answers Questions
Time well spent

Office & Staff Performance

Office environment
Staff friendliness
Average wait time
Under 10 minutes

Patient Comments (3)

Wow! I saw the one review and I've never heard one negative about Dr. Hesslegesser , not once. I think he is the best! He has the most years experience, explains so you understand, truly cares, and is so smart, and incredible memory. I was told by 3 Dr.s it was too late. I was allergic to my...more
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Dr. Hesselgesser in my opinion is a doctor who does not treat his patients with the utmost care and proper diagnosis.He misdiagnosed me and 6 suffering weeks occurred. I have had over $6000.00 worth of dental work done due to his negligence. He misdiagnoses me and i was never told about the...more
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I wish I could give Dr. Hesselgesser ten stars! He listens to the concerns of his patients and their families, takes the time to assess the situation, gives excellent advice and care. His expertise has completely transformed my mother's outlook and I cannot convey my gratitude enough. He and his...more
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