Margrit Wiesendanger, M.D., PH.D.
NPI 1922200245ActiveIndividual· Internal Medicine, Rheumatology· New York, NY
Internal Medicine, Rheumatology (M.D., PH.D.) with Icahn School of Medicine at Mount Sinai, practicing in New York, New York. Their prescriptions cost Medicare Part D more than their services did: $2,303,777 for 2,307 claims, against $24,886 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 3 companies reporting payments in 2025, $4,440 in all, mostly consulting fees. Lists Mount Sinai Beth Israel and 1 other hospital as hospital affiliations.
Overview
| NPI | 1922200245 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | May 31, 2007 |
| Last updated in NPPES | Mar 11, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 222037 | 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 | 169 |
|---|---|
| Services billed | 298 across 12 procedure codes |
| Paid by Medicare | $24,886 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,307 · 3,389 30-day fills |
|---|---|
| Patients | 271 |
| Total drug cost | $2,303,777 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Rheumatology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Icahn School of Medicine at Mount SinaiNew York, NY · 2,843 clinicians
Hospital affiliations
- Mount Sinai Beth IsraelNew York, NY
- Mount Sinai HospitalNew York, NY
Industry payments (Open Payments)
- 2025$4,440 · 4 payments from 3 companies
- 2024$34.98 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $4,255 | 2 |
| Astrazeneca Pharmaceuticals LP | $111.21 | 1 |
| Impedimed, Inc. | $73.51 | 1 |
What the 2025 payments were for
- Consulting Fee$4,255 · 2 payments
- Food and Beverage$184.72 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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