Cynthia Mary Ronan IV, M.D.
NPI 1346251659ActiveIndividual· Obstetrics & Gynecology· Derby, CT
Obstetrics & Gynecology (M.D.) in Derby, Connecticut, trained at New York Medical College (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $66,152 for 407 claims, against $12,016 paid for services in 2024. Exeltis, USA Inc. was the largest of 17 companies reporting payments in 2025, $3,384 in all, mostly food and beverage.
Overview
| NPI | 1346251659 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 11, 2006 |
| Last updated in NPPES | Jan 4, 2023 |
| Certified by provider | Jan 4, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 33188 | CT |
| Specialist | 174400000X | 033188 | 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 - Obstetrics/Gynecology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 56 |
|---|---|
| Services billed | 150 across 17 procedure codes |
| Paid by Medicare | $12,016 |
Part D prescriptions in 2024
| Prescriptions (claims) | 407 · 702 30-day fills |
|---|---|
| Patients | 122 |
| Total drug cost | $66,152 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Griffin Faculty Physicians IncDerby, CT · 134 clinicians
Hospital affiliation
- Griffin HospitalDerby, CT
Industry payments (Open Payments)
- 2025$3,384 · 174 payments from 17 companies
- 2024$2,142 · 107 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exeltis, USA Inc. | $1,477 | 94 |
| Sumitomo Pharma America, Inc. | $337.11 | 18 |
| Mayne Pharma Commercial LLC | $295.49 | 14 |
| Astellas Pharma US Inc | $232.83 | 9 |
| Davol Inc. | $225.70 | 2 |
What the 2025 payments were for
- Food and Beverage$3,339 · 173 payments
- Education$45.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Obstetrics & Gynecology providers in Derby
- 1346728441
- 1215665351
- 1407938582
- 1447289574