Diane Hermanie Mainwold, D.O.
NPI 1659365401ActiveIndividual· Obstetrics & Gynecology, Gynecology· Melbourne, FL
Obstetrics & Gynecology, Gynecology (D.O.) with Florida Woman Care LLC, practicing in Melbourne, Florida. Their prescriptions cost Medicare Part D more than their services did: $7,136 for 151 claims, against $3,684 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 7 companies reporting payments in 2025, $159.61 in all, mostly food and beverage. Lists Holmes Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1659365401 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Sep 8, 2005 |
| Last updated in NPPES | Sep 25, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology, Gynecology Primary | 207VG0400X | OS6956 | FL |
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 (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 45 |
|---|---|
| Services billed | 82 across 7 procedure codes |
| Paid by Medicare | $3,684 |
Part D prescriptions in 2024
| Prescriptions (claims) | 151 · 345 30-day fills |
|---|---|
| Patients | 50 |
| Total drug cost | $7,136 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Florida Woman Care LLCTampa, FL · 613 clinicians
Hospital affiliation
- Holmes Regional Medical CenterMelbourne, FL
Industry payments (Open Payments)
- 2025$159.61 · 8 payments from 7 companies
- 2024$147.66 · 8 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $31.66 | 1 |
| Mayne Pharma Commercial LLC | $26.66 | 2 |
| Organon LLC | $24.92 | 1 |
| Vertex Pharmaceuticals Incorporated | $21.72 | 1 |
| Astellas Pharma US Inc | $19.50 | 1 |
What the 2025 payments were for
- Food and Beverage$159.61 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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