Kien-An Duong, MD
NPI 1033175658ActiveIndividual· Internal Medicine· Laguna Woods, CA
Internal Medicine (MD) in Laguna Woods, California, trained at New York Medical College (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $959,427 for 9,119 claims, against $40,176 paid for services in 2024. Amgen Inc. was the largest of 5 companies reporting payments in 2025, $394.94 in all, mostly food and beverage.
Overview
| NPI | 1033175658 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 22, 2006 |
| Last updated in NPPES | Jan 31, 2025 |
| Certified by provider | Jan 31, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A94108 | CA |
| Pediatrics | 208000000X | 236804 | 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 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 208 |
|---|---|
| Services billed | 7,341 across 55 procedure codes |
| Paid by Medicare | $40,176 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,119 · 22,198 30-day fills |
|---|---|
| Patients | 568 |
| Total drug cost | $959,427 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Memorialcare Medical FoundationLong Beach, CA · 566 clinicians
Hospital affiliations
- Memorialcare Orange Coast Medical CenterFountain Valley, CA
- Memorialcare Saddleback Medical CenterLaguna Hills, CA
Industry payments (Open Payments)
- 2025$394.94 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $275.12 | 3 |
| Madrigal Pharmaceuticals | $49.34 | 1 |
| Exact Sciences Corporation | $32.09 | 1 |
| Novo Nordisk Inc | $21.90 | 1 |
| Pfizer Inc. | $16.49 | 1 |
What the 2025 payments were for
- Food and Beverage$394.94 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Laguna Woods
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