Gary A. Matsumura, M.D.
Obstetrics & Gynecology Physician · Vacaville, CA
Gary A. Matsumura, M.D. is an obstetrics & gynecology physician with a practice address in Vacaville, California, and NPI 1144318965, issued on Oct 10, 2006. Check the license (California G40314, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary A. Matsumura
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G40314 CA
Self-reported in NPPES; status is on the state search - Practice location
- 770 Mason St, Vacaville, CA 95688
- Phone
- (707) 454-5800
- Enumerated
- Oct 10, 2006
- Record last updated
- Jul 29, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (707) 454-5831
- Medicaid ID
- 00G403140 CA
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 770 Mason St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Catherine Anthony-Tkach, FNP-BCFamily Nurse Practitioner1790025922
- Tania Aung, M.D.Allergy Physician1760654263
- Teresa Auyeung, MDFamily Medicine Physician1780771154
- Debashree Banerjee, MDPediatrics Physician1588751952
Verify Gary A. Matsumura in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
15 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gary A. Matsumura among 5,088 obstetrics & gynecology physician records in California
Gary A. Matsumura, M.D. is one of 5,088 obstetrics & gynecology 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2015 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Vacaville → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Camille Barnes, M.D.Vacaville, CA 956881174532667
- Thomas Brown, DOVacaville, CA 956881538247432
- Hang Claus, M.D.Vacaville, CA 956881144594334
- Michelle Contreras, M.D.Vacaville, CA 956881730499252
- Ashleigh Denny, MDVacaville, CA 956881376801134
- Bruce Filarsky, MDVacaville, CA 956881477631299
- Elena Fuell Wysong, MDVacaville, CA 956881952842171
- James Hanser, MDVacaville, CA 956881538247341
Common questions
What is Gary A. Matsumura, M.D.'s NPI number?
Gary A. Matsumura, M.D.'s National Provider Identifier (NPI) is 1144318965, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary A. Matsumura, M.D. located?
The NPPES record lists a practice address at 770 Mason St, Vacaville, CA, 95688. Phone: (707) 454-5800. Providers update this record themselves, so call before visiting.
How can I verify Gary A. Matsumura, M.D.'s license?
NPPES lists California license number G40314, 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.
How much does Gary A. Matsumura, M.D. prescribe under Medicare Part D?
In 2024, Gary A. Matsumura, M.D. had 15 Medicare Part D claims; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
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.