Mary Mattheos, M.D.
NPI 1609977719ActiveIndividual· Internal Medicine· Lindenhurst, NY
Internal Medicine (M.D.) with Mary Mattheos Physician, PC, practicing in Lindenhurst, New York. Their prescriptions cost Medicare Part D more than their services did: $774,603 for 6,169 claims, against $439,467 paid for services in 2024. Pfizer Inc. was the largest of 20 companies reporting payments in 2025, $1,359 in all, mostly food and beverage. Lists Good Samaritan Hospital Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1609977719 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Sep 25, 2006 |
| Last updated in NPPES | Oct 31, 2024 |
| Certified by provider | Oct 31, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 161119-1 | 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 | 559 |
|---|---|
| Services billed | 15,420 across 71 procedure codes |
| Paid by Medicare | $439,467 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,169 · 14,779 30-day fills |
|---|---|
| Patients | 687 |
| Total drug cost | $774,603 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mary Mattheos Physician, PCLindenhurst, NY · 2 clinicians
Hospital affiliations
- Good Samaritan Hospital Medical CenterWest Islip, NY
- North Shore University HospitalManhasset, NY
Other facilities
- Catholic Home CareHome health agency · Farmingdale, NY
- Peconic Bay Homehealth ServicesHome health agency · Riverhead, NY
Industry payments (Open Payments)
- 2025$1,359 · 63 payments from 20 companies
- 2024$1,578 · 61 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $194.34 | 12 |
| Astrazeneca Pharmaceuticals LP | $184.59 | 6 |
| Amgen Inc. | $178.42 | 8 |
| Abbvie Inc. | $144.18 | 8 |
| Exact Sciences Corporation | $89.54 | 3 |
What the 2025 payments were for
- Food and Beverage$1,359 · 63 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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