Medicare Part D Prescribers in San Jose, California
33 flagged and high-volume prescribers across 9 medical specialties.
Data: CMS Medicare Part D, 2023 (most current available) · Updated March 2026
33
Providers
$43.5M
Total Drug Cost
2
High Risk
1.5%
Avg Opioid Rate
High-Risk Providers in San Jose
Providers flagged by our multi-factor risk scoring model. Risk scores are statistical indicators, not allegations of wrongdoing. Learn about our methodology.
| Provider | Drug Cost | Opioid Rate |
|---|---|---|
| Donald Siao | $1.1M | 4.9% |
| Zheng-Gang Zhang | $10K | 0.0% |
Top Prescribers by Drug Cost
| Provider | Claims | Drug Cost |
|---|---|---|
| Ngoc Nguyen | 23,914 | $7.1M |
| Tung Nguyen | 46,948 | $6.4M |
| Joann Nguyen | 30,490 | $6.0M |
| Tam Nguyen | 27,524 | $3.9M |
| Dan Dang | 20,105 | $3.0M |
| Vinh Nguyen | 18,585 | $2.8M |
| Khanh Tran | 13,320 | $2.1M |
| Chistopher Do | 20,378 | $2.1M |
| Trang Do | 13,294 | $1.9M |
| Minh Huynh | 18,126 | $1.9M |
| Saman Sabounchi | 20,645 | $1.5M |
| Chung Vu | 13,273 | $1.4M |
| Timothy Ong | 10,181 | $1.2M |
| Donald SiaoHigh Risk | 9,590 | $1.1M |
| Jeanine Phan | 10,097 | $546K |
| Arunasri Kelleti | 1,936 | $272K |
| Assefa Worku | 4,953 | $213K |
| Zheng-Gang ZhangHigh Risk | 104 | $10K |
| Huong Thi Nguyen | 24 | $351 |
| Nam Nguyen | 25 | $182 |
Specialties in San Jose
Internal Medicine
12 providers
Family Practice
4 providers
Dentist
2 providers
Ophthalmology
1 provider
Cardiology
1 provider
Explore More
Data from CMS Medicare Part D Prescriber Public Use File, 2023. Only providers meeting CMS disclosure thresholds are included. Risk scores are statistical indicators based on prescribing pattern analysis — not allegations of fraud or wrongdoing.