Medicare Part D Prescribers in Oakland, California
25 flagged and high-volume prescribers across 12 medical specialties.
Data: CMS Medicare Part D, 2023 (most current available) · Updated March 2026
25
Providers
$9.6M
Total Drug Cost
2
High Risk
9.2%
Avg Opioid Rate
High-Risk Providers in Oakland
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 |
|---|---|---|
| Henry Watson | $868K | 12.9% |
| Kenneth Matsumura | $26K | 0.0% |
Top Prescribers by Drug Cost
| Provider | Claims | Drug Cost |
|---|---|---|
| Xiaoguang Huang | 17,988 | $3.8M |
| Armeen Weber | 10,283 | $1.8M |
| Noel Serrano | 26,060 | $1.7M |
| Francisco Isolani | 22,595 | $1.5M |
| Henry WatsonHigh Risk | 10,053 | $868K |
| Kenneth MatsumuraHigh Risk | 27 | $26K |
| Trang La | 134 | $3,552 |
| Juan Casillas | 68 | $2,392 |
| Bonnie Chen | N/A | N/A |
| Cynthia Bach | N/A | N/A |
| Kelly Goff | N/A | N/A |
| Neal Lischner | N/A | N/A |
| Vidhya Balasubramanian | N/A | N/A |
| Christine Hoehner-Cooper | N/A | N/A |
| Rollington Ferguson | N/A | N/A |
| Stephen Chen | N/A | N/A |
| Thomas Gonda | N/A | N/A |
| Joseph Dickinson | N/A | N/A |
| Kelly Maris-Weissburg | N/A | N/A |
| Robert Hagar | N/A | N/A |
Specialties in Oakland
Internal Medicine
8 providers
Nurse Practitioner
4 providers
Neuropsychiatry
1 provider
Anesthesiology
1 provider
Family Practice
1 provider
Radiation Oncology
1 provider
Pharmacist
1 provider
Cardiology
1 provider
Psychiatry & Neurology
1 provider
Podiatry
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.