Roberto Manllo-Karim, MD
NPI 1891794616ActiveIndividual· Internal Medicine, Nephrology· McAllen, TX
Internal Medicine, Nephrology (MD) with South Texas Kidney Specialists, P.A. and 1 other group, practicing in McAllen, Texas. Their prescriptions cost Medicare Part D more than their services did: $636,441 for 1,882 claims, against $110,786 paid for services in 2024. Akebia Therapeutics Inc was the largest of 7 companies reporting payments in 2025, $471.49 in all, mostly food and beverage. Lists Doctors Hosptal at Renaissance and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1891794616 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 14, 2005 |
| Last updated in NPPES | Nov 1, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | J2181 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 266 |
|---|---|
| Services billed | 1,019 across 21 procedure codes |
| Paid by Medicare | $110,786 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,882 · 2,984 30-day fills |
|---|---|
| Patients | 294 |
| Total drug cost | $636,441 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical groups
- South Texas Kidney Specialists, P.A.McAllen, TX · 15 clinicians
- Southern Texas Nephrology PLLCBrownsville, TX · 6 clinicians
Hospital affiliations
- Doctors Hosptal at RenaissanceEdinburg, TX
- Knapp Medical CenterWeslaco, TX
- Mission Regional Medical CenterMission, TX
- Rio Grande Regional HospitalMcAllen, TX
- South Texas Health SystemEdinburg, TX
Other facilities
- Davita Dialysis Care of McAllenDialysis facility · McAllen, TX
- Donna DialysisDialysis facility · Donna, TX
- Fkc McAllen HomeDialysis facility · Edinburg, TX
- Fresenius Medical Care McAllenDialysis facility · McAllen, TX
- South Texas Dialysis CenterDialysis facility · Mission, TX
Industry payments (Open Payments)
- 2025$471.49 · 12 payments from 7 companies
- 2024$177.25 · 8 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Akebia Therapeutics Inc | $192.78 | 2 |
| Novo Nordisk Inc | $110.66 | 1 |
| Otsuka America Pharmaceutical, Inc. | $52.20 | 3 |
| Genzyme Corporation | $38.37 | 2 |
| Amgen Inc. | $34.91 | 2 |
What the 2025 payments were for
- Food and Beverage$471.49 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 nephrologists in McAllen · All nephrologists in Texas