Justin C. Greiwe, M.D.
NPI 1942444807ActiveIndividual· Allergy & Immunology· Cincinnati, OH
Opted out of Medicare from May 2025 to May 2027. Allergy & Immunology (M.D.) in Cincinnati, Ohio, licensed in OH, with an NPI issued in April 2009. Their prescriptions cost Medicare Part D more than their services did: $345,439 for 760 claims, against $13,281 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 25 companies reporting payments in 2025, $274,232 in all, mostly speaking and faculty fees.
Overview
| NPI | 1942444807 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 22, 2009 |
| Last updated in NPPES | Jul 26, 2022 |
| Certified by provider | Jul 26, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 35.09897 | OH |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out May 22, 2025 – May 22, 2027 |
| Can order and refer | Yes |
| Accepts assignment | Yes (participating) |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Medicare services in 2024
| Medicare patients | 110 |
|---|---|
| Services billed | 586 across 18 procedure codes |
| Paid by Medicare | $13,281 |
Part D prescriptions in 2024
| Prescriptions (claims) | 760 · 1,116 30-day fills |
|---|---|
| Patients | 133 |
| Total drug cost | $345,439 |
| Generic share | 54% of claims |
Industry payments (Open Payments)
- 2025$274,232 · 351 payments from 25 companies
- 2024$233,461 · 349 payments from 26 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $116,687 | 135 |
| Genzyme Corporation | $78,779 | 58 |
| Genentech USA, Inc. | $22,578 | 28 |
| Incyte Corporation | $12,651 | 13 |
| Abbvie Inc. | $11,239 | 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$190,422 · 70 payments
- Consulting Fee$54,022 · 21 payments
- Travel and Lodging$22,123 · 76 payments
- Food and Beverage$7,611 · 182 payments
- Education$53.31 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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