Ronald Jefferson, M.D.
General Practice Physician · Los Angeles, CA
Ronald Jefferson, M.D. is a general practice physician with a practice address in Los Angeles, California, and NPI 1730389800, issued on Jul 18, 2007. Check the license (California G29488, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald Jefferson
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- G29488 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4211 Avalon Blvd, Los Angeles, CA 90011
- Phone
- (323) 432-5185
- Enumerated
- Jul 18, 2007
- Record last updated
- Jul 18, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 4211 Avalon Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alexandra Aguilar, LCSWClinical Social Worker1124146311
- Gregory AlbrechtPodiatrist1669411369
- Shaun AllenClinical Social Worker1821117938
- Nettie AlmadaMarriage & Family Therapist1346379757
- Marie Alpuerto-VillarealPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1396167011
Verify Ronald Jefferson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G29488Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average general practice physician in 2024
3,912 Medicare Part D claims for 184 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims. 55 claims were for opioids.
Most prescribed
- Biktarvy345 claims
- Atorvastatin Calcium323 claims
- Amlodipine Besylate131 claims
- Tivicay128 claims
- Metformin Hcl122 claims
- Lisinopril112 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.
Industry payments in 2024: $11,212.39
41 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 4,259 providers of this specialty with any payment received $1,273.40 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.
Ronald Jefferson among 1,956 general practice physician records in California
Ronald Jefferson, 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 2007, is newer than 34% of them.
- NPI issued2007 · 34% of these records are older, 50% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileNo · 27% of these records are
- Record last updated2007 · 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
- Michael Kemmer, M.D.Los Angeles, CA 900111790105336
- Jose Perez, M.D.Los Angeles, CA 900111336290691
- Ryan Abbott, M.D.Los Angeles, CA 900101194016030
- Jafar BukhamsinLos Angeles, CA 900121518831635
- Soyeon Chin, M.D.Los Angeles, CA 900101841480076
- Samuel Drake, M.D.Los Angeles, CA 900101013094341
- Michael Goldstein, M.D.Los Angeles, CA 900101669683082
- Jin Khoo, M.D.Los Angeles, CA 900121871621094
Common questions
What is Ronald Jefferson, M.D.'s NPI number?
Ronald Jefferson, M.D.'s National Provider Identifier (NPI) is 1730389800, issued on Jul 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Jefferson, M.D. located?
The NPPES record lists a practice address at 4211 Avalon Blvd, Los Angeles, CA, 90011. Phone: (323) 432-5185. Providers update this record themselves, so call before visiting.
How can I verify Ronald Jefferson, M.D.'s license?
NPPES lists California license number G29488, 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 Ronald Jefferson, M.D. prescribe under Medicare Part D?
In 2024, Ronald Jefferson, M.D. had 3,912 Medicare Part D claims for 184 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.