David Kirshbaum
Physician Assistant · Rancho Cucamonga, CANPI 1801855861
Payments from drug & device makers
Across 224 payments — averaging $18.77 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abbott$1K
- AbbVie$589
- Boehringer Ingelheim$430
- Pfizer$400
- Arbor Pharmaceuticals, Inc.$195
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$174
- plus $1K from 23 others
What the payments were for
- Food & beverage$4,205100%
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 |
|---|---|---|
| Abbott | 52 | $1,058 |
| AbbVie | 40 | $589 |
| Boehringer Ingelheim | 24 | $430 |
| Pfizer | 23 | $400 |
| Arbor Pharmaceuticals, Inc. | 13 | $195 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 10 | $174 |
| GSK | 7 | $160 |
| Johnson & Johnson | 5 | $156 |
| AstraZeneca | 8 | $155 |
| Lilly USA, LLC | 6 | $119 |
| Exact Sciences | 4 | $83 |
| Sanofi-aventis U.S. LLC | 4 | $77 |
| Biohaven Pharmaceutical Holding Company Ltd. | 4 | $66 |
| Novo Nordisk | 3 | $58 |
| Merck | 3 | $56 |
| Medtronic | 1 | $53 |
| Amgen | 2 | $46 |
| Biohaven Pharmaceuticals, Inc. | 2 | $42 |
| Dexcom, Inc. | 1 | $40 |
| Shield Therapeutics Inc | 2 | $40 |
| Eisai Inc. | 2 | $38 |
| Axsome Therapeutics, Inc. | 1 | $33 |
| Phadia US Inc. | 1 | $22 |
| Bausch Health US, LLC | 1 | $21 |
| Ardelyx, Inc. | 1 | $21 |
| Astellas Pharma US Inc | 1 | $20 |
| Lifescan, Inc. | 1 | $19 |
| Acerus Pharmaceuticals Corporation | 1 | $17 |
| Azurity Pharmaceuticals, Inc. | 1 | $16 |
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.
How this compares
$4,205 in reported general payments places this provider in the 90th percentile of 10,423 physician assistant providers in California.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| EliquisApixaban | 64 | $43,815 |
| JanuviaSitagliptin Phosphate | 44 | $39,931 |
| XareltoRivaroxaban | 45 | $38,780 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 47 | $35,623 |
| JardianceEmpagliflozin | 30 | $33,833 |
| OzempicSemaglutide | 28 | $25,603 |
| FarxigaDapagliflozin Propanediol | 15 | $9,105 |
| Levothyroxine Sodium | 354 | $4,140 |
| Atorvastatin Calcium | 324 | $3,154 |
| Testosterone | 23 | $2,989 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 64 | $1,965 |
| Irbesartan | 139 | $1,953 |
| Losartan Potassium | 155 | $1,777 |
| Tamsulosin Hcl | 130 | $1,765 |
| Simvastatin | 173 | $1,438 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| PfizerEliquis | $400 | $43,81564 claims |
| MerckJanuvia | $56 | $39,93144 claims |
| Johnson & JohnsonXarelto | $156 | $38,78045 claims |
| GSKTrelegy Ellipta | $160 | $35,62347 claims |
| Boehringer IngelheimJardiance | $430 | $33,83330 claims |
| Novo NordiskOzempic | $58 | $25,60328 claims |
| AstraZenecaFarxiga | $155 | $9,10515 claims |
| AbbVieSynthroid, Armour Thyroid | $589 | $2,45844 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 90th percentile of 10,423 physician assistant providers in California.
Other physician assistant in Rancho Cucamonga
- John QuigleyDowney$2.9M
- Andrea NguyenIrvine$1M
- Mikhail AlperMadera$889K
- Erin JensenUpland$716K
- Franklin ClineSacramento$458K
- Carla CrespoMarina del Rey$297K
- Katherine OsakiEl Centro$274K
- Shawna JonesFountain Valley$266K
- Heather AustinSalinas$219K
- Eric CheungLos Angeles$213K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.