Medicare Part D Prescribers in Guaynabo, Puerto Rico
9 flagged and high-volume prescribers across 6 medical specialties.
Data: CMS Medicare Part D, 2023 (most current available) · Updated March 2026
9
Providers
$7.6M
Total Drug Cost
0
High Risk
2.2%
Avg Opioid Rate
Top Prescribers by Drug Cost
| Provider | Claims | Drug Cost |
|---|---|---|
| Denis Ruiz-Serrano | 26,456 | $2.0M |
| Marta Diaz Nater | 22,544 | $1.8M |
| Milciades Mercedes Maldonado | 18,242 | $1.1M |
| Carlos Bujosa | 11,798 | $915K |
| Francisco Pla Mendez | 25,874 | $841K |
| Jose Caldera Nieves | 9,929 | $505K |
| Nestor Perezcardona | 9,186 | $394K |
| Joyce Castro Gonzalez | 647 | $10K |
| Diego Gallardo | 1,052 | $7,225 |
Specialties in Guaynabo
Internal Medicine
3 providers
General Practice
2 providers
Cardiology
1 provider
Family Practice
1 provider
Physical Medicine and Rehabilitation
1 provider
Oral Surgery (Dentist only)
1 provider
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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.