Dr. David A. Margolis, MD
Pediatric Hematology & Oncology (Pediatric Hematology & Oncology Physician)
At a glance
- In the NPI registry since
- 2006
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Pediatric Hematology & Oncology Physician primary
WI license 31416
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Payments from drug and device companies
In 2025, 1 companies reported 8 payments worth $16,787 in total to this clinician.
| Jazz Pharmaceuticals Inc. | $16,787 |
|---|
| Compensation for services other than consulting (speaking, faculty) | $13,775 |
|---|---|
| Travel and Lodging | $2,891 |
| Food and Beverage | $121 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Jazz Pharmaceuticals Inc. Nov 5, 2025 | Compensation for services other than consulting (speaking, faculty) DEFITELIO · HEMATOLOGY/ONCOLOGY | $5,800 |
| Jazz Pharmaceuticals Inc. Dec 22, 2025 | Compensation for services other than consulting (speaking, faculty) DEFITELIO · HEMATOLOGY/ONCOLOGY | $5,800 |
| Jazz Pharmaceuticals Inc. Oct 14, 2025 | Compensation for services other than consulting (speaking, faculty) DEFITELIO · HEMATOLOGY/ONCOLOGY | $2,175 |
| Jazz Pharmaceuticals Inc. Dec 13, 2025 | Travel and Lodging DEFITELIO · HEMATOLOGY/ONCOLOGY · travel to Peoria, IL · in-kind | $1,395 |
| Jazz Pharmaceuticals Inc. Oct 30, 2025 | Travel and Lodging DEFITELIO · HEMATOLOGY/ONCOLOGY · travel to Chicago, IL · in-kind | $1,038 |
| Jazz Pharmaceuticals Inc. Oct 10, 2025 | Travel and Lodging DEFITELIO · HEMATOLOGY/ONCOLOGY · travel to New York, NY · in-kind | $353 |
| Jazz Pharmaceuticals Inc. Oct 10, 2025 | Travel and Lodging DEFITELIO · HEMATOLOGY/ONCOLOGY · travel to New York, NY · in-kind | $104 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.