Gregory R. Lewis, M.D., F.A.A.F.P.
Family Medicine Physician · Los Angeles, CA
Gregory R. Lewis, M.D., F.A.A.F.P. is a family medicine physician with a practice address in Los Angeles, California, and NPI 1225078363, issued on Jun 7, 2006. Check the license (California G142894, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory R. Lewis
- Credential
- M.D., F.A.A.F.P.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- G142894 CA
A142894 CA
23369 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1400 S Grand Ave, Los Angeles, CA 90015
- Phone
- (213) 744-0801
- Enumerated
- Jun 7, 2006
- Record last updated
- Jul 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 315699 AZ
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1400 S Grand Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Harvey Brown, MDPulmonary Disease Physician1235111717
Verify Gregory R. Lewis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G142894Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average family medicine physician in 2024
275 Medicare Part D claims for 43 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Atorvastatin Calcium32 claims
- Amlodipine Besylate16 claims
- Losartan Potassium15 claims
- Metformin Hcl15 claims
- Gabapentin14 claims
- Lisinopril12 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: $116.36
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 55,478 providers of this specialty with any payment received $902.55 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.
Gregory R. Lewis among 17,133 family medicine physician records in California
Gregory R. Lewis, M.D., F.A.A.F.P. is one of 17,133 family medicine physician records with a practice address in California. 81% 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, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
829 family medicine physician records list a practice address in Los Angeles
They are 829 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Los Angeles → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Kami Adibi, M.D.Los Angeles, CA 900151548211436
- Armaity Austin, M.D, M.P.H, FAAFPLos Angeles, CA 900151558348946
- David Engel, MDLos Angeles, CA 900151790893220
- Drew Fenton, M.D.Los Angeles, CA 900151508837873
- Rosina Franco, M.D.Los Angeles, CA 900151528010964
- Todd Hang, D.O.Los Angeles, CA 900151790796738
- Gaila Kenneally, DOLos Angeles, CA 900151700831468
- Philip Kouros, M.D.Los Angeles, CA 900151972608677
Common questions
What is Gregory R. Lewis, M.D., F.A.A.F.P.'s NPI number?
Gregory R. Lewis, M.D., F.A.A.F.P.'s National Provider Identifier (NPI) is 1225078363, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory R. Lewis, M.D., F.A.A.F.P. located?
The NPPES record lists a practice address at 1400 S Grand Ave, Los Angeles, CA, 90015. Phone: (213) 744-0801. Providers update this record themselves, so call before visiting.
How can I verify Gregory R. Lewis, M.D., F.A.A.F.P.'s license?
NPPES lists California license number G142894, 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 Gregory R. Lewis, M.D., F.A.A.F.P. prescribe under Medicare Part D?
In 2024, Gregory R. Lewis, M.D., F.A.A.F.P. had 275 Medicare Part D claims for 43 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.