Ari Grinspan, M.D.
NPI 1144489105ActiveIndividual· Internal Medicine, Gastroenterology· New York, NY
Internal Medicine, Gastroenterology (M.D.) in New York, New York, trained at Albert Einstein College of Medicine of Yeshiva University (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $335,189 for 554 claims, against $79,697 paid for services in 2024. Janssen Biotech, Inc. was the largest of 5 companies reporting payments in 2025, $495.02 in all, mostly food and beverage.
Overview
| NPI | 1144489105 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 5, 2008 |
| Last updated in NPPES | Feb 22, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 261448 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 355 |
|---|---|
| Services billed | 708 across 36 procedure codes |
| Paid by Medicare | $79,697 |
Part D prescriptions in 2024
| Prescriptions (claims) | 554 · 860 30-day fills |
|---|---|
| Patients | 143 |
| Total drug cost | $335,189 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Icahn School of Medicine at Mount SinaiNew York, NY · 2,843 clinicians
Hospital affiliation
- Mount Sinai HospitalNew York, NY
Industry payments (Open Payments)
- 2025$495.02 · 23 payments from 5 companies
- 2024$862.13 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $255.74 | 9 |
| Abbvie Inc. | $166.05 | 11 |
| Ferring Pharmaceuticals Inc. | $36.42 | 1 |
| Lilly USA, LLC | $20.67 | 1 |
| Aimmune Therapeutics, Inc. | $16.14 | 1 |
What the 2025 payments were for
- Food and Beverage$444.07 · 22 payments
- Education$50.95 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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