John Alan Nastro, M.D.
Internal Medicine Physician · Los Angeles, CA
John Alan Nastro, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1770856817, issued on Feb 21, 2012. Check the license (California G20705, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Alan Nastro
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G20705 CA
G207050 CA
Self-reported in NPPES; status is on the state search - Practice location
- 945 Manning Avenue, Los Angeles, CA 90024
- Phone
- (310) 927-7132
- Enumerated
- Feb 21, 2012
- Record last updated
- Feb 21, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (910) 776-7479
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify John Alan Nastro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G20705Check 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 internal medicine physician in 2024
18 Medicare Part D claims, against an average of 3,176 among the 108,855 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.
John Alan Nastro among 17,696 internal medicine physician records in California
John Alan Nastro, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Alejandra Casillas, M.D.Los Angeles, CA 900241205026721
- Kristina Cordasco, M.D., M.P.H.Los Angeles, CA 900241790700854
- Celeste Emont, M.DLos Angeles, CA 900241043414477
- Harry Green, MDLos Angeles, CA 900241932127560
- Nancy Greengold, MDLos Angeles, CA 900241033328208
- Sarah Kim, M.D.Los Angeles, CA 900241205028651
- Lisa Kransdorf, MDLos Angeles, CA 900241962675223
- S. Anjani Mattai, MDLos Angeles, CA 900241528030996
Common questions
What is John Alan Nastro, M.D.'s NPI number?
John Alan Nastro, M.D.'s National Provider Identifier (NPI) is 1770856817, issued on Feb 21, 2012. An NPI identifies a provider in billing; it is not a license.
Where is John Alan Nastro, M.D. located?
The NPPES record lists a practice address at 945 Manning Avenue, Los Angeles, CA, 90024. Phone: (310) 927-7132. Providers update this record themselves, so call before visiting.
How can I verify John Alan Nastro, M.D.'s license?
NPPES lists California license number G20705, 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 John Alan Nastro, M.D. prescribe under Medicare Part D?
In 2024, John Alan Nastro, M.D. had 18 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.