Jonathon Brian Posthumus, MD
NPI 1255536553ActiveIndividual· Allergy & Immunology· Fredericksburg, VA
Allergy & Immunology (MD) with Allergy Partners PLLC, practicing in Fredericksburg, Virginia. In 2024 Medicare paid $376,119 for 369 patients, and Part D covered 1,019 of their prescriptions, 60% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 15 companies reporting payments in 2025, $1,838 in all, mostly food and beverage. Lists Mary Washington Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1255536553 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 18, 2007 |
| Last updated in NPPES | Oct 31, 2023 |
| Certified by provider | Oct 31, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 0101251294 | VA |
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 (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 369 |
|---|---|
| Services billed | 16,951 across 36 procedure codes |
| Paid by Medicare | $376,119 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,019 · 1,585 30-day fills |
|---|---|
| Patients | 178 |
| Total drug cost | $397,315 |
| Generic share | 60% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Allergy Partners PLLCFishers, IN · 143 clinicians
Hospital affiliations
- Mary Washington HospitalFredericksburg, VA
- Stafford Hospital, LLCStafford, VA
Industry payments (Open Payments)
- 2025$1,838 · 92 payments from 15 companies
- 2024$1,330 · 70 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $567.84 | 30 |
| Glaxosmithkline, LLC. | $381.95 | 21 |
| Novartis Pharmaceuticals Corporation | $215.73 | 12 |
| Regeneron Healthcare Solutions, Inc. | $162.13 | 6 |
| Ars Pharmaceuticals Operations, Inc. | $110.01 | 5 |
What the 2025 payments were for
- Food and Beverage$1,838 · 92 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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