John F. Freiler, M.D.
NPI 1407863533ActiveIndividual· Allergy & Immunology, Allergy· San Antonio, TX
Allergy & Immunology, Allergy (M.D.) in San Antonio, Texas, licensed in TX and NJ, with an NPI issued in August 2006. Their prescriptions cost Medicare Part D more than their services did: $88,597 for 288 claims, against $35,521 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 11 companies reporting payments in 2025, $1,508 in all, mostly food and beverage.
Overview
| NPI | 1407863533 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 2, 2006 |
| Last updated in NPPES | Aug 10, 2023 |
| Certified by provider | Aug 10, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | S2033 | TX |
| Allergy & Immunology, Allergy | 207KA0200X | 25MA08413900 | NJ |
| Internal Medicine | 207R00000X | S2033 | TX |
| Internal Medicine | 207R00000X | 25MA08413900 | NJ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 79 |
|---|---|
| Services billed | 3,885 across 21 procedure codes |
| Paid by Medicare | $35,521 |
Part D prescriptions in 2024
| Prescriptions (claims) | 288 · 366 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $88,597 |
| Generic share | 67% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
Industry payments (Open Payments)
- 2025$1,508 · 40 payments from 11 companies
- 2024$1,726 · 27 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $472.04 | 11 |
| Genzyme Corporation | $265.10 | 3 |
| Ars Pharmaceuticals Operations, Inc. | $262.87 | 12 |
| Sanofi-Aventis U.S. LLC | $122.84 | 5 |
| Genentech USA, Inc. | $117.86 | 1 |
What the 2025 payments were for
- Food and Beverage$1,508 · 40 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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