Frank Edward Mayer, M.D.
Gastroenterology Physician · La Jolla, CA
Frank Edward Mayer, M.D. is a gastroenterology physician with a practice address in La Jolla, California, and NPI 1598760589, issued on Jun 16, 2005. Check the license (California G40234, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Frank Edward Mayer
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G40234 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9850 Genesee Ave, La Jolla, CA 92037
- Phone
- (858) 457-3737
- Enumerated
- Jun 16, 2005
- Record last updated
- Jun 19, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (858) 550-9047
- Medicaid ID
- 00G402340 CA
- Medicare enrollment
- Enrolled (PECOS I20080617000311); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1978
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 9850 Genesee Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Frank Edward Mayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average gastroenterology physician in 2024
511 Medicare Part D claims for 203 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf103 claims
- Pantoprazole Sodium34 claims
- Magnesium Sulfate26 claims
- Esomeprazole Magnesium23 claims
- Creon21 claims
- Amitriptyline Hcl19 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.
Frank Edward Mayer among 2,140 gastroenterology physician records in California
Frank Edward Mayer, M.D. is one of 2,140 gastroenterology 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. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1978 · median 2002 among the 1,538 with a school on file
- Record last updated2009 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in La Jolla → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Walter Coyle, M.D.La Jolla, CA 920371609847482
- Parviz Foroozan, M.D.La Jolla, CA 920371619943016
- Catherine Frenette, M.D.La Jolla, CA 920371417935081
- Mary Krinsky, D.O.La Jolla, CA 920371588765085
- John Kuldau, M.D.La Jolla, CA 920371568442697
- Jill Lane, MDLa Jolla, CA 920371083602338
- Andrew Mayer, MDLa Jolla, CA 920371215949201
- Otto Nebel, M.D.La Jolla, CA 920371851323992
Common questions
What is Frank Edward Mayer, M.D.'s NPI number?
Frank Edward Mayer, M.D.'s National Provider Identifier (NPI) is 1598760589, issued on Jun 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Frank Edward Mayer, M.D. located?
The NPPES record lists a practice address at 9850 Genesee Ave, La Jolla, CA, 92037. Phone: (858) 457-3737. Providers update this record themselves, so call before visiting.
How can I verify Frank Edward Mayer, M.D.'s license?
NPPES lists California license number G40234, 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 Frank Edward Mayer, M.D. prescribe under Medicare Part D?
In 2024, Frank Edward Mayer, M.D. had 511 Medicare Part D claims for 203 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.