Quynh Diem Chau, PA-C
NPI 1871982546ActiveIndividual· Physician Assistant, Medical· Norman, OK
Physician Assistant, Medical (PA-C) with Classen Family Practice LLC, practicing in Norman, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $202,986 for 1,721 claims, against $15,614 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 8 companies reporting payments in 2025, $198.78 in all, mostly food and beverage. Lists Norman Regional and 1 other hospital as hospital affiliations.
Overview
| NPI | 1871982546 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jan 17, 2015 |
| Last updated in NPPES | Sep 1, 2021 |
| Certified by provider | Sep 1, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 2489 | OK |
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 - Physician Assistant (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 92 |
|---|---|
| Services billed | 475 across 35 procedure codes |
| Paid by Medicare | $15,614 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,721 · 3,559 30-day fills |
|---|---|
| Patients | 194 |
| Total drug cost | $202,986 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Classen Family Practice LLCMoore, OK · 9 clinicians
Hospital affiliations
- Norman RegionalNorman, OK
- O U Medical CenterOklahoma City, OK
Industry payments (Open Payments)
- 2025$198.78 · 12 payments from 8 companies
- 2024$545.82 · 38 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $71.00 | 4 |
| Abbvie Inc. | $29.27 | 2 |
| Novo Nordisk Inc | $20.88 | 1 |
| Alkermes, Inc. | $17.29 | 1 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $16.38 | 1 |
What the 2025 payments were for
- Food and Beverage$198.78 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Physician Assistant, Medical providers in Norman
- 1275509929
- 1790986826
- 1003955170
- 1104281435
- 1093743957
- 1275541823
- 1033174032
- 1174878433
- 1881793859
- 1639192446
- 1083355986
- 1518730944