Elkin O. Estrada, MD
NPI 1811995509ActiveIndividual· Internal Medicine, Nephrology· Providence, RI
Internal Medicine, Nephrology (MD) in Providence, Rhode Island, trained at Howard University College of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $748,991 for 3,121 claims, against $98,068 paid for services in 2024. Calliditas Therapeutics US Inc. was the largest of 20 companies reporting payments in 2025, $2,475 in all, mostly food and beverage.
Overview
| NPI | 1811995509 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 7, 2005 |
| Last updated in NPPES | Nov 2, 2026 |
| Certified by provider | Nov 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | MD10888 | RI |
| Internal Medicine | 207R00000X | MD10888 | RI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (RI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 247 |
|---|---|
| Services billed | 1,063 across 17 procedure codes |
| Paid by Medicare | $98,068 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,121 · 6,616 30-day fills |
|---|---|
| Patients | 455 |
| Total drug cost | $748,991 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Howard University College of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Hypertension and Nephrology, Inc.Lincoln, RI · 4 clinicians
Hospital affiliations
- Kent County Memorial HospitalWarwick, RI
- Our Lady of Fatima HospitalNorth Providence, RI
- Rhode Island HospitalProvidence, RI
- Roger Williams Medical CenterProvidence, RI
- The Miriam HospitalProvidence, RI
Other facilities
- Dialysis Center of East ProvidenceDialysis facility · East Providence, RI
- Fmc Nna of ProvidenceDialysis facility · Providence, RI
- Fmc PawtucketDialysis facility · Pawtucket, RI
- Fresenius Kidney Care LincolnDialysis facility · Lincoln, RI
- Fresenius Medical Care of WarwickDialysis facility · Warwick, RI
Industry payments (Open Payments)
- 2025$2,475 · 110 payments from 20 companies
- 2024$1,888 · 87 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $281.75 | 9 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $227.43 | 11 |
| Alexion Pharmaceuticals, Inc. | $204.78 | 8 |
| Otsuka America Pharmaceutical, Inc. | $190.07 | 7 |
| Novo Nordisk Inc | $188.14 | 7 |
What the 2025 payments were for
- Food and Beverage$2,455 · 106 payments
- Education$20.17 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Nephrology providers in Rhode Island →