Andrew G. Mayer, MD
NPI 1215949201ActiveIndividual· Internal Medicine, Gastroenterology· La Jolla, CA
Internal Medicine, Gastroenterology (MD) in La Jolla, California, trained at State University of New York at Buffalo School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $316,985 for 520 claims, against $80,060 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $305.95 in all, mostly food and beverage.
Overview
| NPI | 1215949201 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 12, 2006 |
| Last updated in NPPES | Jul 31, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A77759 | CA |
| Internal Medicine, Gastroenterology | 207RG0100X | 35693 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 400 |
|---|---|
| Services billed | 687 across 33 procedure codes |
| Paid by Medicare | $80,060 |
Part D prescriptions in 2024
| Prescriptions (claims) | 520 · 823 30-day fills |
|---|---|
| Patients | 257 |
| Total drug cost | $316,985 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | State University of New York at Buffalo School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- La Jolla Gastroenterology Medical Group, IncLa Jolla, CA · 5 clinicians
Hospital affiliation
- Scripps Memorial Hospital la JollaLa Jolla, CA
Industry payments (Open Payments)
- 2025$305.95 · 13 payments from 4 companies
- 2024$466.04 · 22 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $201.34 | 9 |
| Janssen Biotech, Inc. | $54.49 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $27.27 | 1 |
| Celltrion USA Inc. | $22.85 | 1 |
What the 2025 payments were for
- Food and Beverage$305.95 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 40 gastroenterologists in La Jolla · All gastroenterologists in California