Christopher Borrero Natal, M.D.
NPI 1821448341ActiveIndividual· Internal Medicine, Nephrology· Ponce, PR
Internal Medicine, Nephrology (M.D.) in Ponce, Puerto Rico, licensed in PR, with an NPI issued in June 2016. Their prescriptions cost Medicare Part D more than their services did: $756,906 for 6,083 claims, against $15,819 paid for services in 2024. Calliditas Therapeutics US Inc. was the largest of 3 companies reporting payments in 2025, $239.34 in all, mostly food and beverage. Lists Hospital Menonita de Aibonito and 1 other hospital as hospital affiliations.
Overview
| NPI | 1821448341 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 15, 2016 |
| Last updated in NPPES | Jul 20, 2021 |
| Certified by provider | Jul 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 21404 | PR |
| Internal Medicine | 207R00000X | 21404 | PR |
| Student in an Organized Health Care Education/Training Program | 390200000X | 21404 | 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 | 35 |
|---|---|
| Services billed | 114 across 11 procedure codes |
| Paid by Medicare | $15,819 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,083 · 6,986 30-day fills |
|---|---|
| Patients | 539 |
| Total drug cost | $756,906 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Hospital affiliations
- Hospital Menonita de AibonitoAibonito, PR
- Hospital Menonita de CayeyCayey, PR
Industry payments (Open Payments)
- 2025$239.34 · 5 payments from 3 companies
- 2024$188.52 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $132.35 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $54.29 | 2 |
| Vifor Pharma, Inc. | $52.70 | 2 |
What the 2025 payments were for
- Food and Beverage$239.34 · 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 →