Ziyad Ayyoub, MD
Physical Medicine & Rehabilitation · Paramount, CANPI 1356451579
Payments from drug & device makers
Across 4,726 payments — averaging $370.73 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ipsen Pharma SAS$534K
- MDD US Operations, LLC$466K
- Merz Pharmaceuticals, LLC$327K
- AbbVie$237K
- Ipsen Biopharmaceuticals, Inc$69K
- Ipsen Innovation$37K
- plus $82K from 9 others
Across 3 payments — averaging $498.69 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Merz Pharmaceuticals, LLC$1K
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 |
|---|---|---|
| Ipsen Pharma SAS | 257 | $533,868 |
| MDD US Operations, LLC | 4,043 | $466,315 |
| Merz Pharmaceuticals, LLC | 53 | $327,434 |
| AbbVie(2 entities) | 200 | $236,898 |
| Ipsen Biopharmaceuticals, Inc | 59 | $68,504 |
| Ipsen Innovation | 8 | $37,333 |
| Pacira Pharmaceuticals Incorporated | 41 | $36,316 |
| Merz North America, Inc. | 42 | $30,244 |
| Supernus Pharmaceuticals, Inc. | 5 | $9,600 |
| Ipsen Biopharm Limited | 1 | $4,380 |
| Nevro Corp. | 10 | $721 |
| Revance Therapeutics, Inc. | 2 | $263 |
| Lundbeck LLC | 2 | $122 |
| Novo Nordisk | 2 | $38 |
| Medtronic | 1 | $21 |
How this compares
$1,752,057 in reported general payments places this provider in the 95th percentile of 830 physical medicine & rehabilitation providers in California.
See all physical medicine & rehabilitation 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 physical medicine & rehabilitation in Paramount
- John ShenFontana$1.3M
- Andrew SkalskySan Diego$463K
- Nanette JoyceSacramento$237K
- Mary OatesSanta Maria$158K
- Jeryl WiensFresno$125K
- Pratik GandhiAnaheim$122K
- Ronald SchillingLong Beach$113K
- Kevin BarretteSan Francisco$84K
- Jeffrey ChenSan Diego$82K
- Steven SampsonLos Angeles$64K
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.