Purab Viswanath, MD
Hand Surgery · Tarzana, CANPI 1336374958
Payments from drug & device makers
Across 40 payments — averaging $87.80 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Micromed Inc$2K
- Stryker$556
- Saxum Surgical, Inc.$474
- Axogen$195
- Acumed LLC$127
- Endo Pharmaceuticals Inc.$121
- plus $323 from 7 others
What the payments were for
- Food & beverage$1,79751%
- Education$1,71549%
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 |
|---|---|---|
| Micromed Inc | 1 | $1,715 |
| Stryker | 12 | $556 |
| Saxum Surgical, Inc. | 5 | $474 |
| Axogen | 4 | $195 |
| Acumed LLC | 1 | $127 |
| Endo Pharmaceuticals Inc. | 7 | $121 |
| Smith+Nephew | 1 | $104 |
| Endo USA, Inc. | 3 | $73 |
| Globus Medical | 2 | $60 |
| Vertex | 1 | $30 |
| Integra Lifesciences Corporation | 1 | $24 |
| Bioventus LLC | 1 | $19 |
| Amgen | 1 | $12 |
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
$3,512 in reported general payments places this provider in the 55th percentile of 249 hand surgery providers in California.
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 |
|---|---|---|
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 123 | $942 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 15 | $229 |
| Tramadol Hcl | 54 | $144 |
| Cephalexin | 18 | $97 |
| Ibuprofen | 15 | $92 |
| Acetaminophen-CodeineAcetaminophen With Codeine | 14 | $86 |
| Meloxicam | 27 | $58 |
Paid to pharmacies, not to this prescriber.
Other hand surgery in Tarzana
- Justin KohTarzana$21K
- Michael Thompsonla Jolla$8.8M
- Steven ShinLos Angeles$2.9M
- Amy LaddStanford$1.7M
- Emilie CheungStanford$1.2M
- Andrew HartmanOceanside$957K
- Nancy LynchSan Mateo$862K
- Jeffrey YaoRedwood City$730K
- Michael BehrmanSanta Barbara$593K
- Prosper BenhaimLos Angeles$492K
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.