Gregory Hanissian, MD
Allergy & Immunology · Germantown, TNNPI 1033216148
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 96.5% of the total across 646 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 39 manufacturers, the largest accounting for just 17.4% — the pattern of someone who eats at a lot of different presentations.
Across 646 payments — averaging $21.64 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$2K
- Sanofi$2K
- GSK$1K
- Genentech USA, Inc.$1K
- Novartis$1K
- CSL Behring$1K
- plus $5K from 33 others
What the payments were for
- Consulting fees$731%
- Speaking & faculty fees$2001%
- Food & beverage$13,49697%
- Education$2112%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| AstraZeneca | 102 | $2,434 |
| Sanofi | 63 | $1,932 |
| GSK | 92 | $1,368 |
| Genentech USA, Inc. | 54 | $1,255 |
| Novartis | 60 | $1,199 |
| CSL Behring | 64 | $1,180 |
| Kaleo, Inc. | 50 | $1,059 |
| Pfizer | 45 | $974 |
| Grifols USA, LLC | 18 | $293 |
| Amgen | 13 | $265 |
| Shire North American Group Inc | 1 | $200 |
| Octapharma USA, Inc. | 6 | $188 |
| ARS Pharmaceuticals Operations, Inc. | 9 | $170 |
| LEO Pharma Inc. | 7 | $140 |
| Teva Pharmaceuticals USA, Inc. | 6 | $137 |
| Blueprint Medicines Corporation | 7 | $133 |
| Takeda Pharmaceuticals U.S.A., Inc. | 7 | $120 |
| Regeneron Healthcare Solutions, Inc. | 2 | $93 |
| Sanofi-aventis U.S. LLC | 1 | $85 |
| Alk-abello, Inc | 4 | $73 |
| Gilead | 5 | $69 |
| Pharming Healthcare, Inc. | 3 | $64 |
| Biocryst US Sales Co., LLC | 3 | $58 |
| Organon | 2 | $47 |
| Ionis Pharmaceuticals, Inc. | 2 | $46 |
| Lilly USA, LLC | 2 | $45 |
| AbbVie | 2 | $42 |
| Galderma Laboratories, L.p. | 2 | $42 |
| Kedrion Biopharma, Inc. | 2 | $41 |
| Cycle Pharmaceuticals Inc | 1 | $37 |
| Optinose US, Inc. | 2 | $28 |
| Merck | 2 | $24 |
| ADMA Biomanufacturing LLC | 1 | $23 |
| USWM, LLC | 1 | $22 |
| Axsome Therapeutics, Inc. | 1 | $21 |
| Biocryst Pharmaceuticals, Inc. | 1 | $21 |
| Hikma Pharmaceuticals USA | 1 | $19 |
| Boehringer Ingelheim | 1 | $19 |
| Incyte Corporation | 1 | $14 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$13,980 in reported general payments places this provider in the 80th percentile of 79 allergy & immunology providers in Tennessee.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Dupixent PenDupilumab | 26 | $94,467 |
| Dupixent SyringeDupilumab | 24 | $90,337 |
| Breo ElliptaFluticasone/Vilanterol | 11 | $10,967 |
| Fluticasone-SalmeterolFluticasone Propion/Salmeterol | 34 | $4,181 |
| Epinephrine | 12 | $2,084 |
| Cromolyn Sodium | 11 | $1,929 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 29 | $1,184 |
| Azelastine Hcl | 27 | $844 |
| Montelukast Sodium | 31 | $391 |
| Levocetirizine Dihydrochloride | 18 | $296 |
| Fluticasone Propionate | 21 | $164 |
| Terbinafine Hcl | 20 | $146 |
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 11 | $106 |
| Prednisone | 15 | $103 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| GSKBreo Ellipta | $1,368 | $10,96711 claims |
| Hikma Pharmaceuticals USAEpinephrine | $19 | $2,08412 claims |
| Cycle Pharmaceuticals IncCromolyn Sodium | $37 | $1,92911 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 80th percentile of 79 allergy & immunology providers in Tennessee.
Other allergy & immunology in Germantown
- Tammy Heinly McCulleyGermantown$165K
- Nora DaherGermantown$9K
- Nicholas KolinskyKnoxville$472K
- Tidence PrinceMaryville$269K
- Phillip LiebermanMemphis$131K
- John FahrenholzNashville$124K
- Marc CromieChattanooga$106K
- Reena PatelMemphis$101K
- Jay LiebermanMemphis$81K
- Katherine CahillNashville$73K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.