Dr. Jonathan Z. Potack, M.D.
Gastroenterology (Gastroenterology Physician)
At a glance
- Medical school
- Icahn School of Medicine at Mount Sinai (2002)
- Years since graduation
- 24
- In the NPI registry since
- 2007
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
- 2002Medical school: Icahn School of Medicine at Mount Sinai
- 2007Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
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
-
Gastroenterology Physician primary
NY license 228954
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Westchester Medical Center Valhalla, NY
Medical groups
- Westchester Medical Center Advanced Physician Services PC (897 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Payments from drug and device companies
In 2025, 2 companies reported 4 payments worth $1,009 in total to this clinician.
| Genentech, Inc. | $993 |
|---|---|
| Fujifilm Healthcare Americas Corporation | $16.60 |
| Travel and Lodging | $701 |
|---|---|
| Food and Beverage | $308 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Genentech, Inc. Jun 13, 2025 | Travel and Lodging travel to Chicago, IL | $549 |
| Genentech, Inc. Jul 9, 2025 | Travel and Lodging travel to Chicago, IL | $152 |
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.