NPPES file of Aug 9, 2026

Michael Graham Chen, M.D.

Radiation Oncology Physician · Santa Rosa, CA

Michael Graham Chen, M.D. is a radiation oncology physician with a practice address in Santa Rosa, California, and NPI 1417104720, issued on Aug 19, 2008. Check the license (California G13348, 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
1417104720
Name
Michael Graham Chen
Credential
M.D.
Primary taxonomy
Radiation Oncology Physician 2085R0001X
License number
G13348 CA
Self-reported in NPPES; status is on the state search
Practice location
401 Oak Brook PL, Santa Rosa, CA 95409
Phone
(707) 537-8068
Enumerated
Aug 19, 2008
Record last updated
Aug 19, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(707) 537-8068
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 radiation oncology physician records → All 735 in California → Look up another NPI →

Verify Michael Graham Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G13348    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.

Michael Graham Chen among 735 radiation oncology physician records in California

Michael Graham Chen, M.D. is one of 735 radiation oncology physician records with a practice address in California. 83% 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 2008, is newer than 57% of them.

  • NPI issued2008 · 57% of these records are older, 38% newer
  • In a Medicare fileNo · 83% of these records are
  • In the CMS Doctors and Clinicians fileNo · 74% of these records are
  • Record last updated2008 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Radiation Oncology Physician providers in California

There are 735 radiation oncology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 735 in California → Every provider in Santa Rosa → Radiation Oncology Physician nationwide →

The 8 radiation oncology physician records with the nearest ZIP codes

  1. Frederick David, M.D.Santa Rosa, CA 954031982793808
  2. Cindy Scharfen, M.D.Santa Rosa, CA 954031861582322
  3. Haocheng Cai, DO, PHDTurlock, CA 953821548882632
  4. Pericles Ioannides, M.D.Sonora, CA 953701386007367
  5. Jorge Garcia-Young, M.D.Modesto, CA 953551902860802
  6. Eric Ku, MDModesto, CA 953551013478999
  7. Quoc Luu, M.D.Modesto, CA 953551689692808
  8. Christopher Neville, M.D.Modesto, CA 953551790743136

Common questions

What is Michael Graham Chen, M.D.'s NPI number?

Michael Graham Chen, M.D.'s National Provider Identifier (NPI) is 1417104720, issued on Aug 19, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Michael Graham Chen, M.D. located?

The NPPES record lists a practice address at 401 Oak Brook PL, Santa Rosa, CA, 95409. Phone: (707) 537-8068. Providers update this record themselves, so call before visiting.

How can I verify Michael Graham Chen, M.D.'s license?

NPPES lists California license number G13348, 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.