Hazar Dahhan, M.D.
NPI 1023077609ActiveIndividual· Internal Medicine, Cardiovascular Disease· Manchester, CT
Internal Medicine, Cardiovascular Disease (M.D.) with Hartford Healthcare Medical Group Specialists PLLC and 1 other group, practicing in Manchester, Connecticut. Their prescriptions cost Medicare Part D more than their services did: $5,045,737 for 19,416 claims, against $294,671 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. reported $39.84 in payments in 2025, mostly education. Lists Hartford Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1023077609 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 21, 2006 |
| Last updated in NPPES | Dec 2, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 028665 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 1,426 |
|---|---|
| Services billed | 4,471 across 31 procedure codes |
| Paid by Medicare | $294,671 |
Part D prescriptions in 2024
| Prescriptions (claims) | 19,416 · 51,766 30-day fills |
|---|---|
| Patients | 1,954 |
| Total drug cost | $5,045,737 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- Hartford Healthcare Medical Group Specialists PLLCBridgeport, CT · 1,588 clinicians
- Prospect CT Medical Foundation IncManchester, CT · 282 clinicians
Hospital affiliations
- Hartford HospitalHartford, CT
- Manchester Memorial HospitalManchester, CT
- St Francis Hospital & Medical CenterHartford, CT
Industry payments (Open Payments)
- 2025$39.84 · 2 payments from 1 company
- 2024$125.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $39.84 | 2 |
What the 2025 payments were for
- Education$39.84 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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