Diana C. Negreanu, MD
NPI 1538282447ActiveIndividual· Specialist· Portland, OR
Specialist (MD) with The Endocrine Clinic PC, practicing in Portland, Oregon. Their prescriptions cost Medicare Part D more than their services did: $312,775 for 1,398 claims, against $15,842 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $44.95 in all, mostly food and beverage. Lists Adventist Health Portland and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1538282447 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 6, 2007 |
| Last updated in NPPES | May 12, 2022 |
| Certified by provider | May 12, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | LL16507 | OR |
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 - Endocrinology (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 114 |
|---|---|
| Services billed | 201 across 8 procedure codes |
| Paid by Medicare | $15,842 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,398 · 3,485 30-day fills |
|---|---|
| Patients | 207 |
| Total drug cost | $312,775 |
| Generic share | 49% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- The Endocrine Clinic PCPortland, OR · 2 clinicians
Hospital affiliations
- Adventist Health PortlandPortland, OR
- Legacy Good Samaritan Medical CenterPortland, OR
- Legacy Mount Hood Medical CenterGresham, OR
- Providence Portland Medical CenterPortland, OR
- Providence Willamette Falls Medical CenterOregon City, OR
Industry payments (Open Payments)
- 2025$44.95 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $28.65 | 1 |
| Neurocrine Biosciences, Inc. | $16.30 | 1 |
What the 2025 payments were for
- Food and Beverage$44.95 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 500 Specialist providers in Portland · All Specialist providers in Oregon