NPPES file of Aug 9, 2026

Bernard Klein, M.D.

Internal Medicine Physician · Thousand Oaks, CA

Bernard Klein, M.D. is an internal medicine physician with a practice address in Thousand Oaks, California, and NPI 1831382738, issued on Aug 23, 2007. Check the license (California G61659, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1831382738
Name
Bernard Klein
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
G61659 CA
Self-reported in NPPES; status is on the state search
Practice location
365 E Hillcrest Dr, Thousand Oaks, CA 91360
Phone
(805) 374-7600
Enumerated
Aug 23, 2007
Record last updated
Aug 28, 2007 (not updated in 19 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 365 E Hillcrest Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Annapoorani Chellappan, M.D.Family Medicine Physician1023377330
  2. Maria Felicitas Dizon, M.D.Geriatric Medicine (Family Medicine) Physician1598910267
  3. Jinous Etemadi, M.D.Internal Medicine Physician1821431784
  4. Rouxann Fujimoto, PHARM.D.Pharmacist1750439816
  5. Sharon Jafari, NPNurse Practitioner1245438910
  6. Stella LeePharmacist1528468634

Verify Bernard Klein in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G61659    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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Bernard Klein among 17,696 internal medicine physician records in California

Bernard Klein, 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 not. Its NPI, issued in 2007, is newer than 44% of them.

  • NPI issued2007 · 44% of these records are older, 44% newer
  • In a Medicare fileNo · 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).

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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

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

  1. Jose-Nitram Aliling, M.D.Thousand Oaks, CA 913601912177759
  2. Manoj Aswani, M.D.Thousand Oaks, CA 913601801848825
  3. Pedram Bagheri, MDThousand Oaks, CA 913601578785275
  4. Russell Hines, M.D.Thousand Oaks, CA 913601548213101
  5. Christina Jacob, M.D.Thousand Oaks, CA 913601497758957
  6. Jane Lindberg, MDThousand Oaks, CA 913601467548149
  7. Steven McCarthy, M.D.Thousand Oaks, CA 913601497765309
  8. Francoise Menteer, MDThousand Oaks, CA 913601114939006

Common questions

What is Bernard Klein, M.D.'s NPI number?

Bernard Klein, M.D.'s National Provider Identifier (NPI) is 1831382738, issued on Aug 23, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Bernard Klein, M.D. located?

The NPPES record lists a practice address at 365 E Hillcrest Dr, Thousand Oaks, CA, 91360. Phone: (805) 374-7600. Providers update this record themselves, so call before visiting.

How can I verify Bernard Klein, M.D.'s license?

NPPES lists California license number G61659, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.