Margaret M. Andersen, MD
NPI 1679642938ActiveIndividual· Internal Medicine· Valhalla, NY
Internal Medicine (MD) in Valhalla, New York, trained at State University of New York at Stony Brook, School of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $114,316 for 1,366 claims, against $24,209 paid for services in 2024. Exact Sciences Corporation was the largest of 2 companies reporting payments in 2025, $111.06 in all, mostly food and beverage.
Overview
| NPI | 1679642938 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 8, 2006 |
| Last updated in NPPES | Oct 27, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 202880 | 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 - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 111 |
|---|---|
| Services billed | 389 across 33 procedure codes |
| Paid by Medicare | $24,209 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,366 · 3,462 30-day fills |
|---|---|
| Patients | 232 |
| Total drug cost | $114,316 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | State University of New York at Stony Brook, School of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- North Shore-Lij Medical PCStaten Island, NY · 6,440 clinicians
Hospital affiliation
- Northern Westchester HospitalMount Kisco, NY
Other facilities
- North Shore Home Care ChhaHome health agency · Westbury, NY
Industry payments (Open Payments)
- 2025$111.06 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $91.08 | 1 |
| Abbott Laboratories | $19.98 | 1 |
What the 2025 payments were for
- Food and Beverage$91.08 · 1 payment
- Long term medical supply or device loan$19.98 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 69 internal medicine physicians in Valhalla · All internal medicine physicians in New York