Patrick J. Cahill, D.O.
NPI 1134229909ActiveIndividual· Obstetrics & Gynecology· Stamford, CT
Obstetrics & Gynecology (D.O.) in Stamford, Connecticut, trained at New York College of Osteo Medicine of New York Institute of Technology (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $23,550 for 220 claims, against $7,335 paid for services in 2024. Exeltis, USA Inc. was the largest of 13 companies reporting payments in 2025, $1,304 in all, mostly food and beverage.
Overview
| NPI | 1134229909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Sep 22, 2006 |
| Last updated in NPPES | Jun 13, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 000548 | 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 - Obstetrics/Gynecology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 59 |
|---|---|
| Services billed | 180 across 10 procedure codes |
| Paid by Medicare | $7,335 |
Part D prescriptions in 2024
| Prescriptions (claims) | 220 · 304 30-day fills |
|---|---|
| Patients | 63 |
| Total drug cost | $23,550 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | New York College of Osteo Medicine of New York Institute of Technology |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Coastal Obstetrics and GynecologyStamford, CT · 5 clinicians
Hospital affiliations
- Greenwich Hospital Association -Greenwich, CT
- Stamford HospitalStamford, CT
Industry payments (Open Payments)
- 2025$1,304 · 51 payments from 13 companies
- 2024$1,146 · 48 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exeltis, USA Inc. | $236.33 | 4 |
| Astellas Pharma US Inc | $219.65 | 11 |
| Mayne Pharma Commercial LLC | $212.81 | 10 |
| Biogen, Inc. | $206.47 | 8 |
| Conmed Corporation | $77.79 | 2 |
What the 2025 payments were for
- Food and Beverage$1,304 · 51 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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