David M. Feinstein, MD
Internal Medicine Physician · Sunnyvale, CA
David M. Feinstein, MD is an internal medicine physician with a practice address in Sunnyvale, California, and NPI 1609810597, issued on Jun 15, 2006. Check the license (California G83862, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David M. Feinstein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G83862 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1413 Knowlton Dr, Sunnyvale, CA 94087
- Phone
- (805) 602-0386
- Enumerated
- Jun 15, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G838620 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify David M. Feinstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G83862Check 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
19 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 84% 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.
David M. Feinstein among 17,696 internal medicine physician records in California
David M. Feinstein, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 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).
48 internal medicine physician records list a practice address in Sunnyvale
They are 48 of the 1,690 NPPES records with a practice address in Sunnyvale, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Sunnyvale → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anne Cole, M.D.Sunnyvale, CA 940871922188945
- Andrew Lin, MDSunnyvale, CA 940871679635254
- Longhang Nguyen, MDSunnyvale, CA 940871194894550
- Seema Sangwan, M.D.Sunnyvale, CA 940871952370900
- Subrina Sattar, M.D.Sunnyvale, CA 940871184074841
- Surekha Vetsa, M.DSunnyvale, CA 940871184650871
- Zubia Ahmad, MDSunnyvale, CA 940861265879522
- Syed Salman Ali, MDSunnyvale, CA 940861740621671
Common questions
What is David M. Feinstein, MD's NPI number?
David M. Feinstein, MD's National Provider Identifier (NPI) is 1609810597, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David M. Feinstein, MD located?
The NPPES record lists a practice address at 1413 Knowlton Dr, Sunnyvale, CA, 94087. Phone: (805) 602-0386. Providers update this record themselves, so call before visiting.
How can I verify David M. Feinstein, MD's license?
NPPES lists California license number G83862, 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 David M. Feinstein, MD prescribe under Medicare Part D?
In 2024, David M. Feinstein, MD had 19 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.