Diem K. Nguyen, MD
NPI 1811954019ActiveIndividual· Obstetrics & Gynecology· Monroeville, PA
Obstetrics & Gynecology (MD) in Monroeville, Pennsylvania, trained at University of Pittsburgh School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $46,752 for 428 claims, against $8,207 paid for services in 2024. Coopersurgical, Inc. was the largest of 2 companies reporting payments in 2025, $145.43 in all, mostly food and beverage.
Overview
| NPI | 1811954019 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 1, 2006 |
| Last updated in NPPES | Aug 6, 2021 |
| Certified by provider | Aug 6, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | MD424440 | PA |
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 - Obstetrics/Gynecology (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 61 |
|---|---|
| Services billed | 101 across 21 procedure codes |
| Paid by Medicare | $8,207 |
Part D prescriptions in 2024
| Prescriptions (claims) | 428 · 734 30-day fills |
|---|---|
| Patients | 119 |
| Total drug cost | $46,752 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | University of Pittsburgh School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Allegheny ClinicPittsburgh, PA · 2,389 clinicians
Hospital affiliation
- Forbes HospitalMonroeville, PA
Industry payments (Open Payments)
- 2025$145.43 · 2 payments from 2 companies
- 2024$110.66 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Coopersurgical, Inc. | $124.50 | 1 |
| Sage Therapeutics, LLC | $20.93 | 1 |
What the 2025 payments were for
- Food and Beverage$145.43 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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