Omar Viswanath, MD
Pain Medicine · Phoenix, AZNPI 1669813994
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (41.8%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. 30 manufacturers reported payments, led by Nalu Medical, Inc. at 44.7% of the total. 2025 is the largest year on record at $19,728, 4.1 times the $4,800 reported in 2019. Among pain medicine clinicians in AZ with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 306 payments — averaging $135.72 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Nalu Medical, Inc.$19K
- Abbott$16K
- GRT US Holding, Inc.$2K
- Medtronic$2K
- Nevro Corp.$959
- Si-bone, Inc.$540
- plus $1K from 24 others
What the payments were for
- Consulting fees$17,36542%
- Speaking & faculty fees$2,0005%
- Travel & lodging$6,00914%
- Food & beverage$16,15639%
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 |
|---|---|---|
| Nalu Medical, Inc. | 40 | $18,560 |
| Abbott | 177 | $16,357 |
| GRT US Holding, Inc. | 7 | $2,125 |
| Medtronic(2 entities) | 22 | $1,937 |
| Nevro Corp. | 15 | $959 |
| Si-bone, Inc. | 5 | $540 |
| Relievant Medsystems, Inc. | 4 | $181 |
| Boston Scientific | 5 | $170 |
| Vertos Medical, Inc. | 1 | $139 |
| AbbVie(2 entities) | 4 | $77 |
| Electronic Waveform Lab, Inc. | 2 | $52 |
| Biodelivery Sciences International, Inc. | 3 | $50 |
| Saluda Medical Americas, Inc. | 1 | $40 |
| Ferring Pharmaceuticals Inc. | 2 | $37 |
| SPR Therapeutics, Inc | 2 | $34 |
| Sanofi-aventis U.S. LLC | 2 | $29 |
| Fidia Pharma USA Inc. | 1 | $24 |
| Collegium Pharmaceutical, Inc. | 1 | $24 |
| Amgen | 1 | $24 |
| Globus Medical | 1 | $22 |
| West Therapeutics Development, LLC | 1 | $20 |
| Pfizer | 1 | $18 |
| Arbor Pharmaceuticals, Inc. | 1 | $16 |
| Pacira Therapeutics, Inc. | 1 | $16 |
| Novartis | 1 | $15 |
| Ultragenyx Pharmaceutical Inc. | 1 | $15 |
| MDD US Operations, LLC | 1 | $13 |
| Team_makena_llc | 1 | $13 |
| Forte Bio-pharma LLC | 1 | $12 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $11 |
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.
- Nalu Neurostimulation System$18,378
- PROCLAIM$9,266
- Qutenza$2,000
- KYPHON Balloon Kyphoplasty$1,273
- Proclaim Family of SCS IPGs$1,203
- Proclaim IPG$963
- Octrode SCS Leads$604
- Senza Spinal Cord Stimulation System$531
- OCTRODE$326
- ETERNA$290
- Axium INS DRG IPG$171
- Proclaim Plus SCS with FlexBurst360$170
- mild Device Kit$139
- INFINITY$138
- Omnia$130
- KYPHON EXPRESS II KYPHOPAK TRAY$114
How this compares
$41,529 in reported general payments places this provider in the 90th percentile of 180 pain medicine providers in Arizona.
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 |
|---|---|---|
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 93 | $2,386 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 94 | $1,343 |
| Gabapentin | 109 | $1,244 |
| Oxycodone Hcl | 40 | $528 |
| Celecoxib | 12 | $439 |
| Pregabalin | 18 | $364 |
| Tizanidine Hcl | 36 | $261 |
| Baclofen | 16 | $161 |
| Diclofenac Sodium | 14 | $142 |
| Tramadol Hcl | 23 | $130 |
| Cephalexin | 15 | $59 |
Paid to pharmacies, not to this prescriber.
Other pain medicine in Phoenix
- Minesh ZaveriPhoenix$187K
- Christine HaddadPhoenix$98K
- Gobi ParamanandamPhoenix$46K
- Lynn ChangPhoenix$29K
- Mark KallgrenPhoenix$24K
- Ruchir GuptaPhoenix$15K
- Shawnjeet SainiPhoenix$14K
- Jawad ArshadPhoenix$13K
- Shafik BoyajiPhoenix$10K
- Nicholas ScottPhoenix$9K
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.