NPPES file of Aug 9, 2026

Robert Matthews, M.D.

Nuclear Radiology Physician · Walnut Creek, CA

Robert Matthews, M.D. is a nuclear radiology physician with a practice address in Walnut Creek, California, and NPI 1215963186, issued on Jun 23, 2006. Check the license 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
1215963186
Name
Robert Matthews
Credential
M.D.
Primary taxonomy
Nuclear Radiology Physician 2085N0904X
License number
232749 NY
Self-reported in NPPES; status is on the state search
Practice location
1425 S Main St, Walnut Creek, CA 94596
Phone
(925) 295-4000
Enumerated
Jun 23, 2006
Record last updated
Jun 22, 2022
Medicare enrollment
Enrolled (PECOS I20220817000532); accepts Medicare assignment
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.
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8 nearest nuclear radiology physician records → All 64 in California → Look up another NPI →

Also registered at 1425 S Main St

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

  1. Eric AaserudeEmergency Medicine Physician1811491194
  2. Derek Abbassi, MDObstetrics & Gynecology Physician1841364155
  3. Peter Ackerman, MDEmergency Medicine Physician1427435023
  4. Aaron Mark Acosta, DOEmergency Medicine Physician1538789987
  5. Basil Adad, MDOtolaryngology Physician1487732574
  6. Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804

Verify Robert Matthews 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.

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Bills Medicare through one group practice

  1. Permanente Medical Group IncWalnut Creek, CA

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

Robert Matthews among 64 nuclear radiology physician records in California

Robert Matthews, M.D. is one of 64 nuclear radiology physician records with a practice address in California. 72% 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 6% of them.

  • NPI issued2006 · 6% of these records are older, 53% newer
  • In a Medicare fileYes · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2000 · median 2000 among the 42 with a school on file
  • Record last updated2022 · 38% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085N0904X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nuclear Radiology Physician providers in California

There are 64 nuclear radiology physician records in California.

All 64 in California → Every provider in Walnut Creek → Nuclear Radiology Physician nationwide →

The 8 nuclear radiology physician records with the nearest ZIP codes

  1. Ely Wolin, M.D.Travis Afb, CA 945351225091945
  2. Erin Cook Grady, MDStanford, CA 943051396945937
  3. Guido Davidzon, M.D. M.S.Palo Alto, CA 943051215238209
  4. Kip Guja, MD, PHDStanford, CA 943051033641568
  5. Muhannad Hafi, MDStanford, CA 943051073776480
  6. Andrei Iagaru, MDStanford, CA 943051750404752
  7. Henry Li, MDStanford, CA 943051730544016
  8. Farshad Moradi, M.D., PH.D.Stanford, CA 943051225298581

Common questions

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

Robert Matthews, M.D.'s National Provider Identifier (NPI) is 1215963186, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Robert Matthews, M.D. located?

The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4000. Providers update this record themselves, so call before visiting.

How can I verify Robert Matthews, 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. 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.