Khanh Tan Duong, MD
Internal Medicine (MD) with Hospitalist Medicine Physicians of California Inc, practicing in Montclair, California. Their prescriptions cost Medicare Part D more than their services did: $248,072 for 2,416 claims, against $102,427 paid for services in 2024. Exact Sciences Corporation was the largest of 2 companies reporting payments in 2025, $31.88 in all, mostly food and beverage. Lists Barstow Community Hospital and 3 other hospitals as hospital affiliations. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1225528466 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 14, 2018 |
| Last updated in NPPES | Feb 25, 2022 |
| Certified by provider | Feb 25, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A174153 | CA |
| Internal Medicine | 207R00000X | BP10064981 | TX |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Khanh Minh Duong · Employee | 1128a1 | Mar 20, 2007 | Garden Grove, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 439 |
|---|---|
| Services billed | 1,055 across 17 procedure codes |
| Paid by Medicare | $102,427 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,416 · 4,319 30-day fills |
|---|---|
| Patients | 290 |
| Total drug cost | $248,072 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Hospitalist Medicine Physicians of California IncOceanside, CA · 123 clinicians
Hospital affiliations
- Barstow Community HospitalBarstow, CA
- Emanate Health Inter-Community HospitalCovina, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- Providence St Mary Medical CenterApple Valley, CA
Industry payments (Open Payments)
- 2025$31.88 · 2 payments from 2 companies
- 2024$7.10 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $16.04 | 1 |
| Mannkind Corporation | $15.84 | 1 |
What the 2025 payments were for
- Food and Beverage$31.88 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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