NPPES file of Aug 9, 2026

Bruce Matthews, M.D.

Diagnostic Radiology Physician · Ventura, CA

Bruce Matthews, M.D. is a diagnostic radiology physician with a practice address in Ventura, California, and NPI 1134283344, issued on Dec 21, 2006. Check the license (California G46977, 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 · Medicare files 2023 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1134283344
Name
Bruce Matthews
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
G46977 CA
Self-reported in NPPES; status is on the state search
Practice location
3291 Loma Vista RD, Ventura, CA 93003
Phone
(805) 652-6556
Enumerated
Dec 21, 2006
Record last updated
Jul 8, 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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Also registered at 3291 Loma Vista RD

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

  1. Brad Adler, M.D.Anatomic Pathology Physician1003979618
  2. Alejandro Andrade, M.D.Family Medicine Physician1770713190
  3. James Appel, MDFamily Medicine Physician1083939706
  4. David Araujo, M.D.Family Medicine Physician1114955994
  5. Maria Arizmendi, M.D.Pediatrics Physician1366641961
  6. Ralph Armstrong, M.D.Psychiatry Physician1518016443

Verify Bruce Matthews in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G46977
    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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The practice group's MIPS final score for 2023 (Medicare payment program): 87.2 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score84.1
  2. Costout of 100 · 30%56.5
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Bruce Matthews among 4,500 diagnostic radiology physician records in California

Bruce Matthews, 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 fileNo · 70% of these records are
  • Record last updated2007 · 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.

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Duke Bahn, MDVentura, CA 930031174579700
  2. Matthew Carr, M.D.Ventura, CA 930031336202365
  3. Kyu Choi, MDVentura, CA 930031316986938
  4. Wook-Chin Chong, MDVentura, CA 930031982656203
  5. Roger GoldmanVentura, CA 930031619313566
  6. Reed Horwitz, M.D.Ventura, CA 930031558420398
  7. John McMahan, M.D.Ventura, CA 930031104980317
  8. Eric Wallace, MDVentura, CA 930031578502191

Common questions

What is Bruce Matthews, M.D.'s NPI number?

Bruce Matthews, M.D.'s National Provider Identifier (NPI) is 1134283344, issued on Dec 21, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Bruce Matthews, M.D. located?

The NPPES record lists a practice address at 3291 Loma Vista RD, Ventura, CA, 93003. Phone: (805) 652-6556. Providers update this record themselves, so call before visiting.

How can I verify Bruce Matthews, M.D.'s license?

NPPES lists California license number G46977, 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.

What is Bruce Matthews, M.D.'s MIPS final score?

The 2023 MIPS final score is 87.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.