Mark N. Fiengo, DO
NPI 1245214220ActiveIndividual· Internal Medicine, Cardiovascular Disease· Waterford, CT
Internal Medicine, Cardiovascular Disease (DO) in Waterford, Connecticut, licensed in CT, with an NPI issued in December 2005. Their prescriptions cost Medicare Part D more than their services did: $868,750 for 3,348 claims, against $48,108 paid for services in 2024.
Overview
| NPI | 1245214220 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Dec 2, 2005 |
| Last updated in NPPES | Mar 10, 2020 |
| Certified by provider | Mar 10, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 000281 | CT |
| Internal Medicine, Interventional Cardiology | 207RI0011X | 00281 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 398 |
|---|---|
| Services billed | 766 across 21 procedure codes |
| Paid by Medicare | $48,108 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,348 · 8,530 30-day fills |
|---|---|
| Patients | 581 |
| Total drug cost | $868,750 |
| Generic share | 79% of claims |
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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