NPPES file of Aug 9, 2026

Robert M. Brenner, M.D.

Nephrology Physician · Thousand Oaks, CA

Robert M. Brenner, M.D. is a nephrology physician with a practice address in Thousand Oaks, California, and NPI 1861431397, issued on Jun 6, 2006. Check the license 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
1861431397
Name
Robert M. Brenner
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
151076 MA
Self-reported in NPPES; status is on the state search
Practice location
1 Amgen Center Dr, Thousand Oaks, CA 91320
Phone
(805) 447-5939
Enumerated
Jun 6, 2006
Record last updated
Jul 13, 2026
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.
Download card Updates feed

8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →

Also registered at 1 Amgen Center Dr

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

  1. Sumita Bhatta, MDHematology & Oncology Physician1588827802
  2. Niloufer Cainglit, RN, NPNurse Practitioner1497304786
  3. Steven Galson, MD, MPHPublic Health & General Preventive Medicine Physician1386975993
  4. Leandro Grimaldi, MD, MPH, EMBASpecialist1063364347
  5. Gregg Kasting, MDPreventive Medicine/Occupational Environmental Medicine Physician1831481225
  6. Lisa Mathis, MDPediatrics Physician1528134483

Verify Robert M. Brenner in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of CaliforniaCheck 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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Robert M. Brenner among 1,468 nephrology physician records in California

Robert M. Brenner, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% 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 2006, is newer than 10% of them.

  • NPI issued2006 · 10% of these records are older, 48% newer
  • In a Medicare fileNo · 88% of these records are
  • In the CMS Doctors and Clinicians fileNo · 77% of these records are
  • Record last updated2026 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nephrology Physician providers in California

There are 1,468 nephrology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,468 in California → Every provider in Thousand Oaks → Nephrology Physician nationwide →

The 8 nephrology physician records with the nearest ZIP codes

  1. Allan Pollock, M.D.Newbury Park, CA 913201013958792
  2. Karen Vossen Smirnakis, M.D.Thousand Oaks, CA 913201780783530
  3. Ramanath Dukkipati, M.DNorthridge, CA 913241457570376
  4. Ram Patak, M.D.Northridge, CA 913241144218488
  5. Jacob Poulose, MD.Northridge, CA 913241578723508
  6. Mahfuzur Rahman, MDNorthridge, CA 913241447470554
  7. Rouzbeh Afsari, M.D.Northridge, CA 913251962633289
  8. Dayan Gandhi, M.D, M.SNorthridge, CA 913251285961789

Common questions

What is Robert M. Brenner, M.D.'s NPI number?

Robert M. Brenner, M.D.'s National Provider Identifier (NPI) is 1861431397, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Robert M. Brenner, M.D. located?

The NPPES record lists a practice address at 1 Amgen Center Dr, Thousand Oaks, CA, 91320. Phone: (805) 447-5939. Providers update this record themselves, so call before visiting.

How can I verify Robert M. Brenner, M.D.'s license?

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.