Marie Louies Lamsen, M.D.
NPI 1982975710ActiveIndividual· Internal Medicine· Danbury, CT
Internal Medicine (M.D.) in Danbury, Connecticut, trained at Saint Louis University School of Medicine (class of 2009). 549 Medicare patients in 2024, $102,107 paid; nearly all of their 186 Part D prescriptions were generic (90%). Pfizer Inc. was the largest of 5 companies reporting payments in 2025, $142.39 in all, mostly food and beverage.
Overview
| NPI | 1982975710 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 25, 2012 |
| Last updated in NPPES | Jan 31, 2022 |
| Certified by provider | Jan 31, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 70095 | CT |
| Internal Medicine | 207R00000X | 274350 | NY |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 (CT); Practitioner - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 549 |
|---|---|
| Services billed | 1,214 across 12 procedure codes |
| Paid by Medicare | $102,107 |
Part D prescriptions in 2024
| Prescriptions (claims) | 186 · 212 30-day fills |
|---|---|
| Patients | 87 |
| Total drug cost | $10,114 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- North Shore-Lij Medical PCStaten Island, NY · 6,440 clinicians
- Nuvance Health Medical Practice CT IncDanbury, CT · 747 clinicians
- East Post Road Medical Services PCWhite Plains, NY · 429 clinicians
Hospital affiliations
- Danbury HospitalDanbury, CT
- Griffin HospitalDerby, CT
- Northern Westchester HospitalMount Kisco, NY
- Norwalk HospitalNorwalk, CT
- White Plains Hospital CenterWhite Plains, NY
Other facilities
- Regional HospiceHospice · Danbury, CT
Industry payments (Open Payments)
- 2025$142.39 · 6 payments from 5 companies
- 2024$301.99 · 8 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $36.22 | 2 |
| E.R. Squibb & Sons, L.L.C. | $33.32 | 1 |
| Recordati_rare_diseases_inc. | $30.59 | 1 |
| Merck Sharp & Dohme LLC | $26.43 | 1 |
| Gilead Sciences, Inc. | $15.83 | 1 |
What the 2025 payments were for
- Food and Beverage$142.39 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 125 internal medicine physicians in Danbury · All internal medicine physicians in Connecticut