Paul Aka, MD
Vascular Surgery · Fontana, CANPI 1558438416
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 24 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 10 manufacturers reported payments, led by Shockwave Medical, Inc at 26.0% of the total. Reporting peaked in 2024 at $938 and has fallen 58.8% since, to $387 in 2025. That places this record below the midpoint for vascular surgery clinicians in CA, where the typical reported total is $3,945.
Across 24 payments — averaging $110.57 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Shockwave Medical, Inc$691
- Medtronic$458
- Penumbra, Inc.$372
- Abbott$340
- W. L. Gore & Associates, Inc.$244
- Bolton Medical Inc$154
- plus $395 from 4 others
What the payments were for
- Food & beverage$2,654100%
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 |
|---|---|---|
| Shockwave Medical, Inc | 4 | $691 |
| Medtronic(2 entities) | 5 | $458 |
| Penumbra, Inc. | 3 | $372 |
| Abbott | 3 | $340 |
| W. L. Gore & Associates, Inc. | 3 | $244 |
| Bolton Medical Inc | 1 | $154 |
| Silk Road Medical, Inc. | 2 | $146 |
| Endologix LLC | 1 | $141 |
| Centerline Biomedical Inc. | 1 | $64 |
| Lemaitre Vascular, Inc. | 1 | $44 |
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.
- Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter$691
- Indigo System$252
- Endurant$224
- Abre$176
- JETi All In One Non-Sterile Kit$166
- RELAY THORACIC STENT-GRAFT WITH PLUS DELIVERY SYSTEM$154
- JETi Peripheral Catheter$146
- Alto Abdominal Stent Graft System$141
- ENHANCE Transcarotid Peripheral Access Kit$127
- ENROUTE Transcarotid Neuroprotection System$127
- ENROUTE .014 Guidewire$127
- ENROUTE Transcarotid Stent$127
- Penumbra System$120
- GORE EXCLUDER Thoracoabdominal Branch Endoprosthesis$115
- C3 Delivery System$103
How this compares
$2,654 in reported general payments places this provider in the 40th percentile of 519 vascular 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.
Other vascular surgery in Fontana
- Son DuongFountain Valley$503K
- Venita ChandraPalo Alto$488K
- Sukgu HanLos Angeles$477K
- Leigh Ann ObanionFresno$469K
- Trevor DerderianRancho Mirage$359K
- Karthikeshwar KasirajanPalo Alto$349K
- Johnathon RolloLos Angeles$337K
- Melissa LojaFairfield$272K
- Jason LeePalo Alto$228K
- John LaneSan Diego$212K
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.