Clarence Clark, MD
Colon & Rectal Surgery · Chandler, AZNPI 1952582397
Payments from drug & device makers
What this record shows
This record is dominated by education: $16,180 of the $19,442 with a category attached, or 83.2%. Intuitive Surgical accounts for 93.8% of it on its own, with 13 other manufacturers making up the rest. Reporting peaked in 2021 at $16,216 and has fallen 99.7% since, to $42 in 2025.
Across 38 payments — averaging $511.62 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$18K
- Stryker$412
- Medtronic$180
- Covidien LP$136
- THD America, Inc.$111
- Conmed Corporation$111
- plus $259 from 8 others
What the payments were for
- Travel & lodging$1,8269%
- Food & beverage$1,4227%
- Education$16,18083%
- Gifts$140%
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 |
|---|---|---|
| Intuitive Surgical | 22 | $18,231 |
| Stryker | 1 | $412 |
| Medtronic | 1 | $180 |
| Covidien LP | 1 | $136 |
| THD America, Inc. | 1 | $111 |
| Conmed Corporation | 1 | $111 |
| Johnson & Johnson | 3 | $75 |
| Davol Inc. | 2 | $42 |
| Baxter Healthcare | 1 | $37 |
| Abbott | 1 | $25 |
| Olympus America Inc. | 1 | $23 |
| Pacira Pharmaceuticals Incorporated | 1 | $20 |
| Boston Scientific | 1 | $19 |
| CSL Behring | 1 | $18 |
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.
- Da Vinci Surgical System$17,855
- 1588 HD 3 CHIP CAMERA$412
- Signia$316
- AIRSEAL$111
How this compares
$19,442 in reported general payments places this provider in the 80th percentile of 50 colon & rectal surgery 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 |
|---|---|---|
| Neomycin Sulfate | 20 | $113 |
| Metronidazole | 19 | $28 |
Paid to pharmacies, not to this prescriber.
Other colon & rectal surgery in Chandler
- Hekmat HakimanChandler$57K
- Arpit PatelChandler$11K
- Paul TenderChandler$1K
- Deborah KellerScottsdale$195K
- Eugene KimPhoenix$189K
- Sushil PandeySurprise$125K
- Ashley CasanoPhoenix$48K
- Debora Fox-McclaryPhoenix$41K
- Michael BuckmireMesa$36K
- Nasrin GhalyaiePhoenix$22K
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.