Robert Jay Margolis, M.D.
Medical Oncology Physician · Torrance, CA
Robert Jay Margolis, M.D. is a medical oncology physician with a practice address in Torrance, California, and NPI 1568401388, issued on Jun 6, 2006. Check the license (California G28020, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Jay Margolis
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- G28020 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19191 S Vermont Ave, Torrance, CA 90502
- Phone
- (310) 354-4221
- Enumerated
- Jun 6, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (310) 538-0671
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 19191 S Vermont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Grace Hoffman, OTRLOccupational Therapist1841486115
- Stephanie Jennison, R.N.,N.P.Adult Health Nurse Practitioner1851548564
- Ellen LuongFamily Nurse Practitioner1073473757
Verify Robert Jay Margolis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G28020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average medical oncology physician in 2024
18 Medicare Part D claims, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D.
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.
Robert Jay Margolis among 447 medical oncology physician records in California
Robert Jay Margolis, M.D. is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2026 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in Torrance → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Jeena Chorath, M.D.Torrance, CA 905021639529480
- Parvin Peddi, MDTorrance, CA 905051750504577
- Kim Margolin, MDSanta Monica, CA 904041912014713
- Przemyslaw Twardowski, MDSanta Monica, CA 904041942317987
- Robert Lehrer, M.D.Santa Monica, CA 904031851664577
- Thomas Reynolds, MDMontebello, CA 906401457398471
- Alex Ehsan, M.D,Cerritos, CA 907031982883948
- Nawazish Khan, MDCerritos, CA 907031477753903
Common questions
What is Robert Jay Margolis, M.D.'s NPI number?
Robert Jay Margolis, M.D.'s National Provider Identifier (NPI) is 1568401388, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Jay Margolis, M.D. located?
The NPPES record lists a practice address at 19191 S Vermont Ave, Torrance, CA, 90502. Phone: (310) 354-4221. Providers update this record themselves, so call before visiting.
How can I verify Robert Jay Margolis, M.D.'s license?
NPPES lists California license number G28020, 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 Jay Margolis, M.D. prescribe under Medicare Part D?
In 2024, Robert Jay Margolis, M.D. had 18 Medicare Part D claims; the average among medical oncology physician prescribers was 703. 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.