Marie E. Dy-Guillaume, MD
NPI 1538123922ActiveIndividual· Internal Medicine, Infectious Disease· Elmhurst, NY
Internal Medicine, Infectious Disease (MD) with Medical Associates, P.C., practicing in Elmhurst, New York. Their prescriptions cost Medicare Part D more than their services did: $103,885 for 1,049 claims, against $7,541 paid for services in 2024.
Overview
| NPI | 1538123922 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 13, 2006 |
| Last updated in NPPES | Jul 1, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 201321 | 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 | 15 |
|---|---|
| Services billed | 86 across 12 procedure codes |
| Paid by Medicare | $7,541 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,049 · 2,766 30-day fills |
|---|---|
| Patients | 88 |
| Total drug cost | $103,885 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Infectious Disease |
Medical group
- Medical Associates, P.C.Elmhurst, NY · 2 clinicians
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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