Aaron Benjamin Simon, MD, PHD
Radiation Oncology Physician · Orange, CA
Aaron Benjamin Simon, MD, PHD is a radiation oncology physician with a practice address in Orange, California, and NPI 1801250550, issued on Apr 8, 2016. Check the license (California A152727, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aaron Benjamin Simon
- Credential
- MD, PHD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- A152727 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S RM 139, Orange, CA 92868
- Phone
- (714) 456-8074
- Enumerated
- Apr 8, 2016
- Record last updated
- Jun 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20210712003631); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Verify Aaron Benjamin Simon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average radiation oncology physician in 2024
54 Medicare Part D claims for 25 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Dexamethasone14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- UC Regents Department OF Radiation OncologyOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Benjamin Simon among 735 radiation oncology physician records in California
Aaron Benjamin Simon, MD, PHD is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 84% of them.
- NPI issued2016 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2016 · median 2005 among the 545 with a school on file
- Record last updated2021 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in Orange → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Christina Abel, NURSE PRACTITIONEROrange, CA 928681033638911
- Robert Ash, MDOrange, CA 928681326238650
- Tanuja Bhandari, MDOrange, CA 928681518147610
- Allen Chen, M.D.Orange, CA 928681518992981
- Megan Daly, M.D.Orange, CA 928681780863340
- Steven Davis, M.D.Orange, CA 928681558463653
- Shera Feinstein, MDOrange, CA 928681437600194
- Jeremy Harris, MDOrange, CA 928681922427053
Common questions
What is Aaron Benjamin Simon, MD, PHD's NPI number?
Aaron Benjamin Simon, MD, PHD's National Provider Identifier (NPI) is 1801250550, issued on Apr 8, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Benjamin Simon, MD, PHD located?
The NPPES record lists a practice address at 101 The City Dr S RM 139, Orange, CA, 92868. Phone: (714) 456-8074. Providers update this record themselves, so call before visiting.
How can I verify Aaron Benjamin Simon, MD, PHD's license?
NPPES lists California license number A152727, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Aaron Benjamin Simon, MD, PHD prescribe under Medicare Part D?
In 2024, Aaron Benjamin Simon, MD, PHD had 54 Medicare Part D claims for 25 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.