Andrew G. Mayer, MD
Gastroenterology Physician · La Jolla, CA
Andrew G. Mayer, MD is a gastroenterology physician with a practice address in La Jolla, California, and NPI 1215949201, issued on Aug 12, 2006. Check the license (California A77759, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew G. Mayer
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- A77759 CA
35693 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 9850 Genesee Ave, La Jolla, CA 92037
- Phone
- (858) 453-5200
- Enumerated
- Aug 12, 2006
- Record last updated
- Jul 31, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (858) 453-4589
- Medicare enrollment
- Enrolled (PECOS I20071017000889); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2000
- 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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- Azar Bastanfar, CERTIFIED NURSE PRACNurse Practitioner1265459184
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Verify Andrew G. Mayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77759Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average gastroenterology physician in 2024
520 Medicare Part D claims for 257 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 Sulf145 claims
- Omeprazole73 claims
- Pantoprazole Sodium48 claims
- Linzess30 claims
- Mesalamine29 claims
- Colestipol Hcl25 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.
Industry payments in 2024: $466.04
22 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- LA Jolla Gastroenterology Medical Group, IncLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew G. Mayer among 2,140 gastroenterology physician records in California
Andrew G. Mayer, MD 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2000 · median 2002 among the 1,538 with a school on file
- Record last updated2007 · 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
- Frank Mayer, M.D.La Jolla, CA 920371598760589
- Otto Nebel, M.D.La Jolla, CA 920371851323992
Common questions
What is Andrew G. Mayer, MD's NPI number?
Andrew G. Mayer, MD's National Provider Identifier (NPI) is 1215949201, issued on Aug 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Andrew G. Mayer, MD located?
The NPPES record lists a practice address at 9850 Genesee Ave, La Jolla, CA, 92037. Phone: (858) 453-5200. Providers update this record themselves, so call before visiting.
How can I verify Andrew G. Mayer, MD's license?
NPPES lists California license number A77759, 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 Andrew G. Mayer, MD prescribe under Medicare Part D?
In 2024, Andrew G. Mayer, MD had 520 Medicare Part D claims for 257 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.