Brian B. Ronson, MD
Radiation Oncology Physician · Temecula, CA
Brian B. Ronson, MD is a radiation oncology physician with a practice address in Temecula, California, and NPI 1750364493, issued on Nov 28, 2005. Check the license (California A77586, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brian B. Ronson
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- A77586 CA
Self-reported in NPPES; status is on the state search - Practice location
- 44274 George Cushman CT Ste 100, Temecula, CA 92592
- Phone
- (951) 252-9300
- Enumerated
- Nov 28, 2005
- Record last updated
- Nov 5, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 00A775860 CA
- Medicare enrollment
- Enrolled (PECOS I20050603000997); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Verify Brian B. Ronson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77586Check 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% more Medicare Part D claims than the average radiation oncology physician in 2024
215 Medicare Part D claims for 69 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 30 claims were for opioids.
Most prescribed
- Tamsulosin Hcl75 claims
- Nystatin19 claims
- Memantine Hcl16 claims
- Ssd13 claims
- Hydrocodone-Acetaminophen12 claims
- Tramadol Hcl11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 99.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- City OF Hope Medical FoundationTemecula, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian B. Ronson among 735 radiation oncology physician records in California
Brian B. Ronson, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2000 · median 2005 among the 545 with a school on file
- Record last updated2020 · 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 Temecula → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Tara Washington, MDTemecula, CA 925921780621276
- Parima Daroui, M.D. PH.D.Wildomar, CA 925951629283841
- James Mason, MDWildomar, CA 925951902955818
- Jason Sun, M.D.Wildomar, CA 925951568691830
- Colton Ladbury, MDIrvine, CA 926181891256756
- Percy Lee, M.D.Irvine, CA 926181447442504
- Harry Moyses, M.D.Irvine, CA 926181376522300
- Selamawit Negusse, MDIrvine, CA 926181316144041
Common questions
What is Brian B. Ronson, MD's NPI number?
Brian B. Ronson, MD's National Provider Identifier (NPI) is 1750364493, issued on Nov 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Brian B. Ronson, MD located?
The NPPES record lists a practice address at 44274 George Cushman CT Ste 100, Temecula, CA, 92592. Phone: (951) 252-9300. Providers update this record themselves, so call before visiting.
How can I verify Brian B. Ronson, MD's license?
NPPES lists California license number A77586, 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 Brian B. Ronson, MD prescribe under Medicare Part D?
In 2024, Brian B. Ronson, MD had 215 Medicare Part D claims for 69 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Brian B. Ronson, MD's MIPS final score?
The 2023 MIPS final score is 99.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.