Leonidas Voltaire Sison Mejia, M.D.
General Practice Physician · Los Angeles, CA
Leonidas Voltaire Sison Mejia, M.D. is a general practice physician with a practice address in Los Angeles, California, and NPI 1528170610, issued on Aug 31, 2006. Check the license (California A80800, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leonidas Voltaire Sison Mejia
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- A80800 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4075 Whittier Blvd, Los Angeles, CA 90023
- Phone
- (323) 264-4924
- Enumerated
- Aug 31, 2006
- Record last updated
- Sep 10, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 00A808000 CA
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 4075 Whittier Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raymond Moallemi, M.D.Family Medicine Physician1184944035
Verify Leonidas Voltaire Sison Mejia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A80800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average general practice physician in 2024
153 Medicare Part D claims for 28 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D.
Most prescribed
- Metformin Hcl15 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.
Leonidas Voltaire Sison Mejia among 1,956 general practice physician records in California
Leonidas Voltaire Sison Mejia, M.D. is one of 1,956 general practice physician records with a practice address in California. 48% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 66% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileNo · 27% of these records are
- Record last updated2008 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in California
There are 1,956 general practice physician records in California.
All 1,956 in California → Every provider in Los Angeles → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Masad Arbid, M.D.Los Angeles, CA 900231043366305
- Horacio Fleischman, M.D.Los Angeles, CA 900231619083615
- Siri Hongsathavij, M.D.Los Angeles, CA 900231205014339
- Manasseh Nwaigwe, M.DLos Angeles, CA 900231548486947
- Louis Escandon, MDLos Angeles, CA 900221992853709
- Thomas Gambrell, M.D.Los Angeles, CA 900241326397365
- Enrique Gonzalez, M.D.Los Angeles, CA 900221023161684
- Ronald Grant, MDLos Angeles, CA 900221376984187
Common questions
What is Leonidas Voltaire Sison Mejia, M.D.'s NPI number?
Leonidas Voltaire Sison Mejia, M.D.'s National Provider Identifier (NPI) is 1528170610, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonidas Voltaire Sison Mejia, M.D. located?
The NPPES record lists a practice address at 4075 Whittier Blvd, Los Angeles, CA, 90023. Phone: (323) 264-4924. Providers update this record themselves, so call before visiting.
How can I verify Leonidas Voltaire Sison Mejia, M.D.'s license?
NPPES lists California license number A80800, 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 Leonidas Voltaire Sison Mejia, M.D. prescribe under Medicare Part D?
In 2024, Leonidas Voltaire Sison Mejia, M.D. had 153 Medicare Part D claims for 28 beneficiaries; the average among general practice physician prescribers was 3,030. 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.