Mark K. Youssef, M.D.
NPI 1679910301ActiveIndividual· Radiology, Diagnostic Radiology· Southbury, CT
Radiology, Diagnostic Radiology (M.D.) with Naugatuck Valley Radiological Associates PC and 3 other groups, practicing in Southbury, Connecticut. Medicare paid $141,382 for services to 1,417 patients in 2024. Merz North America, Inc. reported $38.31 in payments in 2025, mostly food and beverage. Lists Griffin Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1679910301 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 4, 2013 |
| Last updated in NPPES | May 24, 2024 |
| Certified by provider | May 20, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Diagnostic Radiology Primary | 2085R0202X | 72105 | CT |
| Radiology, Vascular & Interventional Radiology | 2085R0204X | 72105 | CT |
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 - Diagnostic Radiology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,417 |
|---|---|
| Services billed | 7,441 across 138 procedure codes |
| Paid by Medicare | $141,382 |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Diagnostic Radiology |
| Secondary specialties | Interventional Radiology |
Medical groups
- Naugatuck Valley Radiological Associates PCSouthbury, CT · 12 clinicians
- Diagnostic Imaging of SouthburySouthbury, CT · 11 clinicians
- Diagnostic Imaging Associates LLCWaterbury, CT · 10 clinicians
- Prospect Diagnostic ImagingProspect, CT · 10 clinicians
Hospital affiliations
- Griffin HospitalDerby, CT
- Saint Mary's HospitalWaterbury, CT
Industry payments (Open Payments)
- 2025$38.31 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merz North America, Inc. | $38.31 | 1 |
What the 2025 payments were for
- Food and Beverage$38.31 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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