Gregory Hanissian, MD
Allergy & Immunology · Germantown, TNNPI 1033216148
Payments from drug & device makers
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
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 |
How this compares
$13,980 in reported general payments places this provider in the 75th 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.
Other allergy & immunology in Germantown
- Tammy Heinly McCulleyGermantown$165K
- Nora DaherGermantown$9K
- Nicholas KolinskyKnoxville$472K
- Karthik KrishnanMaryville$410K
- Tidence PrinceMaryville$303K
- Jay LiebermanMemphis$270K
- Katherine CahillNashville$208K
- Phillip LiebermanMemphis$131K
- John FahrenholzNashville$124K
- Marc CromieChattanooga$106K
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.