Vijay K. Koka, MD
NPI 1144423922ActiveIndividual· Internal Medicine, Nephrology· Pasadena, TX
Internal Medicine, Nephrology (MD) with Renal Specialists of Houston, PA, practicing in Pasadena, Texas. Their prescriptions cost Medicare Part D more than their services did: $1,469,156 for 3,790 claims, against $144,877 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 8 companies reporting payments in 2025, $471.05 in all, mostly food and beverage. Lists HCA Houston Healthcare Clear Lake and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1144423922 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2007 |
| Last updated in NPPES | Mar 23, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | M0132 | 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 | 308 |
|---|---|
| Services billed | 1,336 across 24 procedure codes |
| Paid by Medicare | $144,877 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,790 · 6,917 30-day fills |
|---|---|
| Patients | 718 |
| Total drug cost | $1,469,156 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 1996 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Renal Specialists of Houston, PAHouston, TX · 24 clinicians
Hospital affiliations
- HCA Houston Healthcare Clear LakeWebster, TX
- HCA Houston Healthcare SoutheastPasadena, TX
- Houston Methodist Baytown HospitalBaytown, TX
- Memorial Hermann Hospital SystemHouston, TX
- St Luke's Patients Medical CenterPasadena, TX
Other facilities
- Bayshore Dialysis CenterDialysis facility · Pasadena, TX
- Davita Pine Park DialysisDialysis facility · Pasadena, TX
- Fmc Dialysis Services of Deer ParkDialysis facility · Deer Park, TX
- Fmc Strawberry ParkDialysis facility · Pasadena, TX
- Fresenius Medical Care Baytown NorthDialysis facility · Baytown, TX
Industry payments (Open Payments)
- 2025$471.05 · 26 payments from 8 companies
- 2024$479.59 · 29 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $147.92 | 10 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $80.35 | 3 |
| Vifor Pharma, Inc. | $75.53 | 4 |
| Otsuka America Pharmaceutical, Inc. | $60.20 | 3 |
| Lilly USA, LLC | $38.49 | 2 |
What the 2025 payments were for
- Food and Beverage$471.05 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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