Joseph Chambers, MD
Interventional Cardiology · Tucson, AZNPI 1578533238
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $2,520 of the $3,420 with a category attached, or 73.7%. Boston Scientific accounts for 70.9% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2019 at $1,589 and has fallen 79.4% since, to $327 in 2025. That places this record below the midpoint for interventional cardiology clinicians in AZ, where the typical reported total is $10,657.
Across 80 payments — averaging $42.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$2K
- Shockwave Medical, Inc$309
- Abbott$229
- Medtronic$197
- Inari Medical, Inc.$155
- ZOLL Services LLC (a/k/a ZOLL Lifecor Corp)$55
- plus $51 from 2 others
What the payments were for
- Travel & lodging$88626%
- Food & beverage$2,52074%
- Education$140%
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 |
|---|---|---|
| Boston Scientific | 41 | $2,425 |
| Shockwave Medical, Inc | 15 | $309 |
| Abbott | 6 | $229 |
| Medtronic(2 entities) | 11 | $197 |
| Inari Medical, Inc. | 2 | $155 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 3 | $55 |
| Indivior Inc. | 1 | $37 |
| AstraZeneca | 1 | $14 |
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.
- GENERAL - THERAPIES$1,307
- FLOWTRIEVER CATHETER, S$281
- AVEIR$146
How this compares
$3,420 in reported general payments places this provider in the 20th percentile of 223 interventional cardiology 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 |
|---|---|---|
| EliquisApixaban | 295 | $347,277 |
| EntrestoSacubitril/Valsartan | 125 | $136,482 |
| XareltoRivaroxaban | 60 | $84,112 |
| JardianceEmpagliflozin | 31 | $33,543 |
| Repatha PushtronexEvolocumab | 14 | $17,036 |
| Repatha SureclickEvolocumab | 17 | $15,829 |
| Diltiazem 24hr Er (Cd)Diltiazem Hcl | 89 | $3,509 |
| Flecainide Acetate | 64 | $3,270 |
| Metoprolol Succinate | 271 | $3,082 |
| Atorvastatin Calcium | 316 | $3,024 |
| Losartan Potassium | 270 | $2,306 |
| Ranolazine ErRanolazine | 22 | $2,272 |
| Carvedilol | 202 | $1,869 |
| Nebivolol Hcl | 14 | $1,610 |
| Lisinopril | 195 | $1,368 |
Paid to pharmacies, not to this prescriber.
Other interventional cardiology in Tucson
- Thomas WaggonerTucson$617K
- Kapildeo LotunTucson$365K
- Neil GheewalaTucson$141K
- Dexter de LeonTucson$74K
- William ThomasTucson$56K
- Ranjith ShettyTucson$50K
- Santiago RamirezTucson$45K
- Sulaiman RathoreTucson$32K
- Michel CorbanTucson$27K
- Sundeep ShenoyTucson$24K
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.