Josean Omar Flores Santiago, MD
NPI 1467938795ActiveIndividual· Internal Medicine, Nephrology· Mayaguez, PR
Internal Medicine, Nephrology (MD) in Mayaguez, Puerto Rico, trained at Ponce School of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $107,065 for 465 claims, against $2,997 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 2 companies reporting payments in 2025, $139.83 in all, mostly food and beverage.
Overview
| NPI | 1467938795 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 19, 2018 |
| Last updated in NPPES | Sep 16, 2025 |
| Certified by provider | Sep 16, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 023329 | PR |
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 - Nephrology (PR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 44 across 6 procedure codes |
| Paid by Medicare | $2,997 |
Part D prescriptions in 2024
| Prescriptions (claims) | 465 · 606 30-day fills |
|---|---|
| Patients | 110 |
| Total drug cost | $107,065 |
| Generic share | 66% of claims |
Education and affiliations
| Medical school | Ponce School of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Nephrology |
Industry payments (Open Payments)
- 2025$139.83 · 5 payments from 2 companies
- 2024$671.24 · 22 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $113.10 | 4 |
| Astrazeneca Pharmaceuticals LP | $26.73 | 1 |
What the 2025 payments were for
- Food and Beverage$139.83 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Nephrology providers in Puerto Rico →