Carlos Juan Chiesa, M.D.
NPI 1487659462ActiveIndividual· Internal Medicine, Hematology & Oncology· Bayamon, PR
Internal Medicine, Hematology & Oncology (M.D.) in Bayamon, Puerto Rico, licensed in PR, with an NPI issued in June 2005. Their prescriptions cost Medicare Part D more than their services did: $1,462,347 for 529 claims, against $39,856 paid for services in 2024. Janssen Pharmaceuticals, Inc was the largest of 21 companies reporting payments in 2025, $2,787 in all, mostly food and beverage. Lists Hospital Espanol Auxilio Mutuo San Pablo as a hospital affiliation.
Overview
| NPI | 1487659462 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 16, 2005 |
| Last updated in NPPES | Sep 13, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 5761 | 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 - Internal Medicine (PR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 56 |
|---|---|
| Services billed | 991 across 16 procedure codes |
| Paid by Medicare | $39,856 |
Part D prescriptions in 2024
| Prescriptions (claims) | 529 · 627 30-day fills |
|---|---|
| Patients | 90 |
| Total drug cost | $1,462,347 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1975 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Hematology/Oncology |
Hospital affiliation
- Hospital Espanol Auxilio Mutuo San PabloBayamon, PR
Industry payments (Open Payments)
- 2025$2,787 · 108 payments from 21 companies
- 2024$1,878 · 77 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Pharmaceuticals, Inc | $505.30 | 20 |
| Astrazeneca Pharmaceuticals LP | $424.93 | 18 |
| E.R. Squibb & Sons, L.L.C. | $298.36 | 12 |
| Abbvie Inc. | $239.74 | 10 |
| Eli Lilly Export S.A. Puerto Rico Branch | $208.28 | 8 |
What the 2025 payments were for
- Food and Beverage$2,588 · 106 payments
- Education$199.94 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Hematology & Oncology providers in Puerto Rico →