Ken Duong Nguyen, M.D.
NPI 1205193828ActiveIndividual· Internal Medicine, Gastroenterology· Temple City, CA
Internal Medicine, Gastroenterology (M.D.) in Temple City, California, trained at Boston University School of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $1,050,646 for 1,909 claims, against $118,079 paid for services in 2024. Abbvie Inc. was the largest of 13 companies reporting payments in 2025, $30,256 in all, mostly speaking and faculty fees.
Overview
| NPI | 1205193828 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 20, 2012 |
| Last updated in NPPES | Nov 23, 2023 |
| Certified by provider | Nov 23, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A127222 | CA |
| Internal Medicine, Hepatology | 207RI0008X | A127222 | CA |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 431 |
|---|---|
| Services billed | 1,164 across 48 procedure codes |
| Paid by Medicare | $118,079 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,909 · 2,724 30-day fills |
|---|---|
| Patients | 542 |
| Total drug cost | $1,050,646 |
| Generic share | 65% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Genesis Healthcare Partners PCSan Francisco, CA · 228 clinicians
Hospital affiliation
- Usc Arcadia HospitalArcadia, CA
Industry payments (Open Payments)
- 2025$30,256 · 170 payments from 13 companies
- 2024$33,269 · 170 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $12,607 | 53 |
| Ardelyx, Inc. | $7,896 | 19 |
| Phathom Pharmaceuticals, Inc. | $7,439 | 17 |
| Boston Scientific Corporation | $668.90 | 12 |
| Madrigal Pharmaceuticals | $547.17 | 16 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$25,630 · 13 payments
- Food and Beverage$4,542 · 156 payments
- Education$84.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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