NPPES file of Aug 9, 2026

Brian Kaoru Nagai, M.D.

Diagnostic Radiology Physician · Fremont, CA

Brian Kaoru Nagai, M.D. is a diagnostic radiology physician with a practice address in Fremont, California, and NPI 1467493536, issued on Jun 9, 2006. Check the license (California A69106, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1467493536
Name
Brian Kaoru Nagai
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License numbers
A69106 CA
12221 NV
Self-reported in NPPES; status is on the state search
Practice location
3200 Kearney St., Fremont, CA 94538
Phone
(510) 490-1222
Enumerated
Jun 9, 2006
Record last updated
May 29, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicaid ID
00A691060 CA
Medicare enrollment
Enrolled (PECOS I20060209000264); accepts Medicare assignment
Medical or professional school
Stanford University School Of Medicine, 1997
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →

Also registered at 3200 Kearney St.

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

  1. Allison Carmichael, M.D.Endocrinology, Diabetes & Metabolism Physician1942553391
  2. Elizabeth Jokerst, M.D.Family Medicine Physician1164518098
  3. David Lewis, M.D.Anesthesiology Physician1528077856
  4. Ann Mallat, MDAnesthesiology Physician1295767549
  5. Taliva Martin, M.D.Ophthalmology Physician1386822112
  6. Lily Ngo, MDPediatrics Physician1912102328

Verify Brian Kaoru Nagai in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A69106    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

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.

Bills Medicare through one group practice

  1. Sutter Bay Medical FoundationFremont, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Brian Kaoru Nagai among 4,500 diagnostic radiology physician records in California

Brian Kaoru Nagai, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% 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 7% of them.

  • NPI issued2006 · 7% of these records are older, 52% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated1997 · median 2004 among the 3,130 with a school on file
  • Record last updated2020 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California.

All 4,500 in California → Every provider in Fremont → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Maureen Chapman, MDFremont, CA 945381336566702
  2. David Chin, MDFremont, CA 945381629017140
  3. Thomas Efird, M.D.Fremont, CA 945381174710339
  4. Haramrit Hansra, M.D..Fremont, CA 945381841695889
  5. Sean Hilchey, MDFremont, CA 945381306858204
  6. Lisa Kinoshita, MDFremont, CA 945381073691853
  7. Bruce Nixon, M.D.Fremont, CA 945381700840238
  8. Gregory Sabo, M.D.Fremont, CA 945381467579581

Common questions

What is Brian Kaoru Nagai, M.D.'s NPI number?

Brian Kaoru Nagai, M.D.'s National Provider Identifier (NPI) is 1467493536, issued on Jun 9, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Brian Kaoru Nagai, M.D. located?

The NPPES record lists a practice address at 3200 Kearney St., Fremont, CA, 94538. Phone: (510) 490-1222. Providers update this record themselves, so call before visiting.

How can I verify Brian Kaoru Nagai, M.D.'s license?

NPPES lists California license number A69106, 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. Medicare files from data.cms.gov. 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.