Azfar Chak, MD
Internal Medicine · Nyack, NYNPI 1043475486
Payments from drug & device makers
Across 2 payments — averaging $12.70 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$25
What the payments were for
- Education$25100%
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 |
|---|---|---|
| Merck | 2 | $25 |
How this compares
$25 in reported general payments places this provider in the 25th percentile of 9,771 internal medicine providers in New York.
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 |
|---|---|---|
| BiktarvyBictegrav/Emtricit/Tenofov Ala | 18 | $82,032 |
| Fosfomycin Tromethamine | 22 | $16,047 |
| Daptomycin | 21 | $10,903 |
| ErtapenemErtapenem Sodium | 16 | $7,078 |
| Vancomycin Hcl | 44 | $5,238 |
| CeftriaxoneCeftriaxone Sodium | 47 | $5,034 |
| Cefepime Hcl | 21 | $3,048 |
| Cefazolin Sodium | 51 | $2,805 |
| Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst | 22 | $1,209 |
| Doxycycline Hyclate | 45 | $571 |
| Amoxicillin | 17 | $528 |
| Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav | 40 | $460 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 32 | $371 |
| CefuroximeCefuroxime Axetil | 14 | $205 |
| Ciprofloxacin Hcl | 14 | $107 |
Paid to pharmacies, not to this prescriber.
Other internal medicine in Nyack
- Helena YuNew York$50.9M
- Neha KordeNew York$21.2M
- Karen AutioNew York$18.5M
- Ingo MellinghoffNew York$16.1M
- Gopakumar IyerNew York$12.4M
- David DoveEast Hampton$12.3M
- Robert CupeloEast Syracuse$10.6M
- Patrick ReaganRochester$9.4M
- Sally LauNew York$8.4M
- Angela BrancheRochester$7.9M
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.