Robert P. Zimmerman, MD
Radiation Oncology Physician · Los Angeles, CA
Robert P. Zimmerman, MD is a radiation oncology physician with a practice address in Los Angeles, California, and NPI 1679558811, issued on Dec 9, 2005. Check the license (California G77580, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert P. Zimmerman
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- G77580 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1338 S Hope St, Los Angeles, CA 90015
- Phone
- (213) 724-5634
- Enumerated
- Dec 9, 2005
- Record last updated
- Apr 5, 2022
- Fax
- (213) 742-5644
- Medicaid ID
- 00G775800 CA
- Medicare enrollment
- Enrolled (PECOS I20041122000922); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 1338 S Hope St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Cooper, FNP-CFamily Nurse Practitioner1518359017
- Shawn Edelstein, PA-CPhysician Assistant1548694938
- Bernard Lewinsky, MDRadiation Oncology Physician1417930140
- Gity QaderFamily Nurse Practitioner1124612080
- Darryl Villamater, CRNACertified Registered Nurse Anesthetist1912421504
- Patricia Wong, MDEmergency Medicine Physician1295781979
Verify Robert P. Zimmerman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G77580Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average radiation oncology physician in 2024
72 Medicare Part D claims for 18 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin 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): 68.8 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).
Industry payments in 2024: $13.82
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- White Memorial Medical CenterLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert P. Zimmerman among 735 radiation oncology physician records in California
Robert P. Zimmerman, 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
- Graduated1992 · median 2005 among the 545 with a school on file
- Record last updated2022 · 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 Los Angeles → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Bernard Lewinsky, MDLos Angeles, CA 900151417930140
- David Huang, MDLos Angeles, CA 900171154325652
- Albert Chang, MD PHDLos Angeles, CA 900241104089267
- Edward Brunngraber, MDLos Angeles, CA 900271891866877
- Harry Cosmatos, MDLos Angeles, CA 900271902977978
- Michael Girvigian, MDLos Angeles, CA 900271215008289
- Barry Goy, MDLos Angeles, CA 900271609947688
- Kevin Holland, MDLos Angeles, CA 900271184796419
Common questions
What is Robert P. Zimmerman, MD's NPI number?
Robert P. Zimmerman, MD's National Provider Identifier (NPI) is 1679558811, issued on Dec 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert P. Zimmerman, MD located?
The NPPES record lists a practice address at 1338 S Hope St, Los Angeles, CA, 90015. Phone: (213) 724-5634. Providers update this record themselves, so call before visiting.
How can I verify Robert P. Zimmerman, MD's license?
NPPES lists California license number G77580, 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 Robert P. Zimmerman, MD prescribe under Medicare Part D?
In 2024, Robert P. Zimmerman, MD had 72 Medicare Part D claims for 18 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Robert P. Zimmerman, MD's MIPS final score?
The 2023 MIPS final score is 68.8 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.