Gary A. Koenig, MD
NPI 1942204656ActiveIndividual· Allergy & Immunology· Omaha, NE
Allergy & Immunology (MD) in Omaha, Nebraska, licensed in NE and IA, with an NPI issued in June 2005. Their prescriptions cost Medicare Part D more than their services did: $1,594,896 for 2,228 claims, against $104,616 paid for services in 2024. Grifols USA, LLC was the largest of 13 companies reporting payments in 2025, $485.11 in all, mostly food and beverage.
Overview
| NPI | 1942204656 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 9, 2005 |
| Last updated in NPPES | Aug 22, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 17844 | NE |
| Internal Medicine | 207R00000X | 17844 | NE |
| Internal Medicine, Pulmonary Disease | 207RP1001X | 17844 | NE |
| Internal Medicine, Sleep Medicine | 207RS0012X | 17844 | NE |
| Allergy & Immunology | 207K00000X | 23943 | IA |
| Internal Medicine | 207R00000X | 23943 | IA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | 23943 | IA |
| Internal Medicine, Sleep Medicine | 207RS0012X | 23943 | IA |
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 - Pulmonary Disease (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 766 |
|---|---|
| Services billed | 2,295 across 25 procedure codes |
| Paid by Medicare | $104,616 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,228 · 3,096 30-day fills |
|---|---|
| Patients | 391 |
| Total drug cost | $1,594,896 |
| Generic share | 52% of claims |
Industry payments (Open Payments)
- 2025$485.11 · 28 payments from 13 companies
- 2024$1,031 · 66 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Grifols USA, LLC | $69.24 | 3 |
| Harmony Biosciences LLC | $67.93 | 3 |
| Astrazeneca Pharmaceuticals LP | $64.29 | 4 |
| Avadel Cns Pharmaceuticals, LLC | $47.46 | 3 |
| Amgen Inc. | $42.13 | 3 |
What the 2025 payments were for
- Food and Beverage$485.11 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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