John Bettinger, M.D.
Gastroenterology Physician · Greenbrae, CA
John Bettinger, M.D. is a gastroenterology physician with a practice address in Greenbrae, California, and NPI 1225037500, issued on Jul 19, 2005. Check the license (California G64202, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Bettinger
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G64202 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1350 S Eliseo Dr, Greenbrae, CA 94904
- Phone
- (415) 925-6900
- Enumerated
- Jul 19, 2005
- Record last updated
- Feb 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (415) 925-6919
- Medicaid ID
- 23820 NM
- Medicare enrollment
- Enrolled (PECOS I20090713000064); may accept Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1986
- Entity
- Type 1 · individual
Also registered at 1350 S Eliseo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Bloom, MDGastroenterology Physician1619931011
- Crystal Brierton, MA CCC-SLPSpeech-Language Pathologist1679127716
- Linda Clem, PAPhysician Assistant1104899772
- Ilkcan Cokgor, M.D.Neurology Physician1235100603
- Timothy Crowley, M.D.Specialist1669573937
- Collet Easy, FNPNurse Practitioner1679340350
Verify John Bettinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64202Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average gastroenterology physician in 2024
107 Medicare Part D claims for 52 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Omeprazole26 claims
- Pantoprazole Sodium17 claims
- Misoprostol12 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
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
Other gastroenterology physician records in California
- David Aarons, MDLodi, CA1619081379
- Constante Abaya, MDOxnard, CA1003918459
- Sadeea Abbasi, M.D., PH.D.Los Angeles, CA1366713513
- Basim Abdelkarim, MDUpland, CA1932217544
- Homan Abdollahzadeh, MDPalm Springs, CA1184634826
- John Abdulian, M.D.Fresno, CA1437114113
- Hussein Abidali, DORancho Cucamonga, CA1205274768
- Alaa Abousaif, MDOrange, CA1235124108
- Donald Abrahm, M.D.Newport Beach, CA1215022405
- Maria Abreu, M.D.West Hollywood, CA1598793374
Common questions
What is John Bettinger, M.D.'s NPI number?
John Bettinger, M.D.'s National Provider Identifier (NPI) is 1225037500, issued on Jul 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Bettinger, M.D. located?
The NPPES record lists a practice address at 1350 S Eliseo Dr, Greenbrae, CA, 94904. Phone: (415) 925-6900. Providers update this record themselves, so call before visiting.
How can I verify John Bettinger, M.D.'s license?
NPPES lists California license number G64202, 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 John Bettinger, M.D. prescribe under Medicare Part D?
In 2024, John Bettinger, M.D. had 107 Medicare Part D claims for 52 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.