Hassan Pervaiz, MD
Sleep Medicine · Carbondale, ILNPI 1710339817
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 93.0% of the total across 16 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 9 manufacturers reported payments, led by Shockwave Medical, Inc at 31.1% of the total. Reporting peaked in 2021 at $333 and has fallen 78.0% since, to $73 in 2025. That places this record below the midpoint for sleep medicine clinicians in IL, where the typical reported total is $1,128.
Across 16 payments — averaging $40.19 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Shockwave Medical, Inc$200
- Abiomed$133
- Harmony Biosciences LLC$109
- Axsome Therapeutics, Inc.$85
- Abbott$34
- Teva Pharmaceuticals USA, Inc.$26
- plus $56 from 3 others
What the payments were for
- Food & beverage$59893%
- Education$457%
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 |
|---|---|---|
| Shockwave Medical, Inc | 1 | $200 |
| Abiomed | 1 | $133 |
| Harmony Biosciences LLC | 4 | $109 |
| Axsome Therapeutics, Inc. | 4 | $85 |
| Abbott | 2 | $34 |
| Teva Pharmaceuticals USA, Inc. | 1 | $26 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $25 |
| Boston Scientific | 1 | $18 |
| Indivior Inc. | 1 | $13 |
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.
- Vascular Lithotripsy$200
- Impella$133
How this compares
$643 in reported general payments places this provider in the 40th percentile of 79 sleep medicine providers in Illinois.
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 |
|---|---|---|
| Fluticasone Propionate | 158 | $1,840 |
| Azelastine Hcl | 74 | $1,538 |
| Gabapentin | 91 | $972 |
| Eszopiclone | 16 | $919 |
| Modafinil | 45 | $758 |
| Clonazepam | 99 | $694 |
| Mirtazapine | 47 | $537 |
| Duloxetine Hcl | 29 | $393 |
| Prazosin Hcl | 24 | $257 |
| Quetiapine Fumarate | 24 | $212 |
| Doxepin Hcl | 13 | $181 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 17 | $140 |
| Zolpidem Tartrate | 22 | $92 |
| Ropinirole Hcl | 15 | $90 |
| Risperidone | 15 | $89 |
Paid to pharmacies, not to this prescriber.
Other sleep medicine in Carbondale
- Muhammad NajjarNorthbrook$479K
- Phyllis ZeeChicago$214K
- Thomas FreedomGlenview$124K
- Syed SayeeduddinBrookfield$65K
- Hrayr AttarianChicago$43K
- Reena Dhanda-PatilChicago$41K
- Amy GuralnickChicago$19K
- Ahmer AliLake Barrington$15K
- Nawaid ShakirSchaumburg$15K
- Anna IvanenkoElk Grove Village$14K
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.