Gregg M. Santilli, M.D.
NPI 1023099082ActiveIndividual· Allergy & Immunology· Plano, TX
Allergy & Immunology (M.D.) in Plano, Texas, trained at Ohio State University College of Medicine (class of 1989). In 2024 Medicare paid $168,493 for 193 patients, and Part D covered 501 of their prescriptions, 59% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 21 companies reporting payments in 2025, $17,055 in all, mostly speaking and faculty fees.
Overview
| NPI | 1023099082 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 8, 2005 |
| Last updated in NPPES | Aug 4, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | K1922 | TX |
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 | 193 |
|---|---|
| Services billed | 11,873 across 31 procedure codes |
| Paid by Medicare | $168,493 |
Part D prescriptions in 2024
| Prescriptions (claims) | 501 · 742 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $200,699 |
| Generic share | 59% of claims |
Education and affiliations
| Medical school | Ohio State University College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Allergy/Immunology |
| Telehealth | Offers telehealth |
Medical group
- John Allen Van Wagoner, MD, PADenison, TX · 9 clinicians
Industry payments (Open Payments)
- 2025$17,055 · 190 payments from 21 companies
- 2024$44,550 · 203 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $13,950 | 58 |
| Regeneron Healthcare Solutions, Inc. | $601.22 | 19 |
| Glaxosmithkline, LLC. | $401.96 | 20 |
| Novartis Pharmaceuticals Corporation | $385.70 | 19 |
| Grifols USA, LLC | $266.12 | 13 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$12,500 · 8 payments
- Food and Beverage$4,466 · 180 payments
- Education$88.77 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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