Naj Nagendran
Internal Medicine Physician · Thousand Oaks, CA
Naj Nagendran is an internal medicine physician with a practice address in Thousand Oaks, California, and NPI 1871810820, issued on Apr 30, 2010. Check the license (California C 39611, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Naj Nagendran
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C 39611 CA
Self-reported in NPPES; status is on the state search - Practice location
- 912 Vista Ridge LN, Thousand Oaks, CA 91362
- Phone
- (805) 341-4809
- Enumerated
- Apr 30, 2010
- Record last updated
- Apr 30, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Naj Nagendran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C 39611Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
12 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 0% 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.
Naj Nagendran among 17,696 internal medicine physician records in California
Naj Nagendran 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2010 · 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).
62 internal medicine physician records list a practice address in Thousand Oaks
They are 62 of the 2,434 NPPES records with a practice address in Thousand Oaks, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Thousand Oaks → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mounir El Fatmi, MDThousand Oaks, CA 913621356406789
- Thomas Giannulli, MS, MSWestlake Village, CA 913621861637027
- Robert Gold, MDThousand Oaks, CA 913621164489456
- Richard Low, MDWestlake Village, CA 913621467343038
- Joseph Miletich, M.D.Westlake Village, CA 913621548690290
- Amit Monga, MDThousand Oaks, CA 913621700021805
- Natalie Abrahamian, M.D.Westlake Village, CA 913611356882567
- Diana AlaviThousand Oaks, CA 913611700276680
Common questions
What is Naj Nagendran's NPI number?
Naj Nagendran's National Provider Identifier (NPI) is 1871810820, issued on Apr 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Naj Nagendran located?
The NPPES record lists a practice address at 912 Vista Ridge LN, Thousand Oaks, CA, 91362. Phone: (805) 341-4809. Providers update this record themselves, so call before visiting.
How can I verify Naj Nagendran's license?
NPPES lists California license number C 39611, 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 Naj Nagendran prescribe under Medicare Part D?
In 2024, Naj Nagendran had 12 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.