William Anthony Guerin, MD
Student in an Organized Health Care Education/Training Program · Martinez, CA
William Anthony Guerin, MD is a student in an organized health care education/training program with a practice address in Martinez, California, and NPI 1245760578, issued on Jun 19, 2017. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Anthony Guerin
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 2500 Alhambra Ave, Martinez, CA 94553
- Phone
- (925) 370-5200
- Enumerated
- Jun 19, 2017
- Record last updated
- Jul 21, 2022
- Medicare enrollment
- Enrolled (PECOS I20241112004189); accepts Medicare assignment
- Medical or professional school
- Geisel School Of Medicine At Dartmouth, 2017
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Also registered at 2500 Alhambra Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Namita AgarwalPediatrics Physician1467626341
- Edward AgyekumDentist1124196696
- Abid Ahmed, M.D.Internal Medicine Physician1346531001
Verify William Anthony Guerin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average student in an organized health care education/training program in 2024
207 Medicare Part D claims for 58 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 15 claims were for opioids.
Most prescribed
- Amlodipine Besylate19 claims
- Atorvastatin Calcium18 claims
- Omeprazole17 claims
- Lisinopril11 claims
- Losartan Potassium11 claims
- Pramipexole Dihydrochloride11 claims
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.
Bills Medicare through one group practice
- Providence Health And Services WashingtonKodiak, AK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Anthony Guerin among 40,652 student in an organized health care education/training program records in California
William Anthony Guerin, MD is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 15% of them.
- NPI issued2017 · 15% of these records are older, 83% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 6% of these records are
- Graduated2017 · median 2017 among the 2,409 with a school on file
- Record last updated2022 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
77 student in an organized health care education/training program records list a practice address in Martinez
They are 77 of the 1,816 NPPES records with a practice address in Martinez, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in Martinez → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Elsie AriasMartinez, CA 945531427569805
- Kaya BelknapMartinez, CA 945531235544834
- Nathalie BoittinMartinez, CA 945531518384635
- Erica Dorfman, M.D.Martinez, CA 945531962817569
- Erik Gonzalez, M.D.Martinez, CA 945531447632898
- Melissa HarlowMartinez, CA 945531902333891
- Thomas Jewell, M.A.Martinez, CA 945531568517647
- Bonnie Kwok, MD, MPHMartinez, CA 945531497160097
Common questions
What is William Anthony Guerin, MD's NPI number?
William Anthony Guerin, MD's National Provider Identifier (NPI) is 1245760578, issued on Jun 19, 2017. An NPI identifies a provider in billing; it is not a license.
Where is William Anthony Guerin, MD located?
The NPPES record lists a practice address at 2500 Alhambra Ave, Martinez, CA, 94553. Phone: (925) 370-5200. Providers update this record themselves, so call before visiting.
How can I verify William Anthony Guerin, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Anthony Guerin, MD prescribe under Medicare Part D?
In 2024, William Anthony Guerin, MD had 207 Medicare Part D claims for 58 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. 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.