Andrew Cherner Engler, MD
NPI 1366400384ActiveIndividual· Internal Medicine, Allergy & Immunology· San Mateo, CA
Internal Medicine, Allergy & Immunology (MD) in San Mateo, California, trained at Stanford University School of Medicine (class of 1982). In 2024 Medicare paid $826,539 for 388 patients, and Part D covered 750 of their prescriptions, 53% of them generic. Ars Pharmaceuticals Operations, Inc. was the largest of 2 companies reporting payments in 2025, $72.09 in all, mostly food and beverage.
Overview
| NPI | 1366400384 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 1, 2006 |
| Last updated in NPPES | Nov 19, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Allergy & Immunology Primary | 207RA0201X | G52230 | CA |
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 - Allergy/Immunology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 388 |
|---|---|
| Services billed | 48,292 across 31 procedure codes |
| Paid by Medicare | $826,539 |
Part D prescriptions in 2024
| Prescriptions (claims) | 750 · 1,207 30-day fills |
|---|---|
| Patients | 245 |
| Total drug cost | $202,901 |
| Generic share | 53% of claims |
Education and affiliations
| Medical school | Stanford University School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Allergy/Immunology |
| Telehealth | Offers telehealth |
Medical group
- Allergy and Asthma Clinic IncorporatedSan Mateo, CA · 6 clinicians
Industry payments (Open Payments)
- 2025$72.09 · 3 payments from 2 companies
- 2024$80.48 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ars Pharmaceuticals Operations, Inc. | $57.34 | 2 |
| Glaxosmithkline, LLC. | $14.75 | 1 |
What the 2025 payments were for
- Food and Beverage$72.09 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Allergy & Immunology providers in San Mateo
- 1336392547
- 1134364250
All Internal Medicine, Allergy & Immunology providers in California