Gary L. Zagelbaum, M.D.
Specialist · Los Angeles, CA
Gary L. Zagelbaum, M.D. is a specialist with a practice address in Los Angeles, California, and NPI 1255586905, issued on Nov 21, 2008. Check the license (California G36630, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gary L. Zagelbaum
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G36630 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6200 Wilshire Blvd, Los Angeles, CA 90048
- Phone
- (323) 857-1323
- Enumerated
- Nov 21, 2008
- Record last updated
- Mar 6, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (323) 857-7089
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 6200 Wilshire Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gary L. Zagelbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G36630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average specialist in 2024
18 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Gary L. Zagelbaum among 5,749 specialist records in California
Gary L. Zagelbaum, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2009 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Los Angeles → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Alexander Allins, M.D.Los Angeles, CA 900481033193016
- Denise Barbuto, M.D.West Hollywood, CA 900481013910983
- Jane Davis, M.D.Los Angeles, CA 900481659354504
- Stephen Geller, M.D.West Hollywood, CA 900481619979762
- Carla Herriford, M.D.Los Angeles, CA 900481114910163
- Lee-Chaun Kao, M.D.Los Angeles, CA 900481588647036
- Theodore Khalili, M.D.Los Angeles, CA 900481023092103
- Renu Khurana, MDWest Hollywood, CA 900481902802358
Common questions
What is Gary L. Zagelbaum, M.D.'s NPI number?
Gary L. Zagelbaum, M.D.'s National Provider Identifier (NPI) is 1255586905, issued on Nov 21, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gary L. Zagelbaum, M.D. located?
The NPPES record lists a practice address at 6200 Wilshire Blvd, Los Angeles, CA, 90048. Phone: (323) 857-1323. Providers update this record themselves, so call before visiting.
How can I verify Gary L. Zagelbaum, M.D.'s license?
NPPES lists California license number G36630, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Gary L. Zagelbaum, M.D. prescribe under Medicare Part D?
In 2024, Gary L. Zagelbaum, M.D. had 18 Medicare Part D claims; the average among specialist prescribers was 1,380. 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.