Diane Michelle Horowitz, M.D.
NPI 1275774101ActiveIndividual· Internal Medicine, Rheumatology· New Hyde Park, NY
Internal Medicine, Rheumatology (M.D.) in New Hyde Park, New York, trained at State University of New York at Stony Brook, School of Medicine (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $1,508,554 for 1,779 claims, against $587,879 paid for services in 2024. Janssen Scientific Affairs, LLC was the largest of 6 companies reporting payments in 2025, $6,710 in all, mostly travel and lodging.
Overview
| NPI | 1275774101 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 24, 2009 |
| Last updated in NPPES | Jan 7, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 246416 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Rheumatology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 242 |
|---|---|
| Services billed | 29,275 across 54 procedure codes |
| Paid by Medicare | $587,879 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,779 · 3,382 30-day fills |
|---|---|
| Patients | 287 |
| Total drug cost | $1,508,554 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | State University of New York at Stony Brook, School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Rheumatology |
| Telehealth | Offers telehealth |
Medical group
- North Shore-Lij Medical PCStaten Island, NY · 6,440 clinicians
Hospital affiliations
- Long Island Jewish Medical CenterNew Hyde Park, NY
- North Shore University HospitalManhasset, NY
- Northwell Hospital Glen CoveGlen Cove, NY
Industry payments (Open Payments)
- 2025$6,710 · 66 payments from 6 companies
- 2024$3,731 · 31 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Scientific Affairs, LLC | $2,566 | 26 |
| Pfizer Inc. | $1,704 | 5 |
| Novartis Pharmaceuticals Corporation | $1,442 | 17 |
| Abbvie Inc. | $525.00 | 1 |
| Genentech, Inc. | $457.73 | 16 |
What the 2025 payments were for
- Travel and Lodging$2,698 · 23 payments
- Consulting Fee$2,379 · 5 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$715.60 · 2 payments
- Honoraria$693.80 · 2 payments
- Food and Beverage$223.59 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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