Gary S. Besser, MD
NPI 1992809982ActiveIndividual· Obstetrics & Gynecology· Stamford, CT
Obstetrics & Gynecology (MD) with Physicians for Women's Health, LLC, practicing in Stamford, Connecticut. Their prescriptions cost Medicare Part D more than their services did: $125,967 for 864 claims, against $55,215 paid for services in 2024. Mayne Pharma Commercial LLC was the largest of 14 companies reporting payments in 2025, $1,172 in all, mostly food and beverage. Lists Greenwich Hospital Association - and 1 other hospital as hospital affiliations.
Overview
| NPI | 1992809982 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 11, 2006 |
| Last updated in NPPES | Oct 27, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 026837 | CT |
| Obstetrics & Gynecology | 207V00000X | 5523899 | NY |
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 | 283 |
|---|---|
| Services billed | 830 across 27 procedure codes |
| Paid by Medicare | $55,215 |
Part D prescriptions in 2024
| Prescriptions (claims) | 864 · 1,732 30-day fills |
|---|---|
| Patients | 243 |
| Total drug cost | $125,967 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 1981 |
|---|---|
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Physicians for Women's Health, LLCDanbury, CT · 318 clinicians
Hospital affiliations
- Greenwich Hospital Association -Greenwich, CT
- Stamford HospitalStamford, CT
Industry payments (Open Payments)
- 2025$1,172 · 54 payments from 14 companies
- 2024$1,051 · 46 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mayne Pharma Commercial LLC | $268.85 | 18 |
| Astellas Pharma US Inc | $220.68 | 8 |
| Sumitomo Pharma America, Inc. | $143.16 | 6 |
| Exeltis, USA Inc. | $119.23 | 2 |
| Exact Sciences Corporation | $86.84 | 4 |
What the 2025 payments were for
- Food and Beverage$1,172 · 54 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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