Justin David Merszei, MD
NPI 1649252529ActiveIndividual· Internal Medicine, Nephrology· Houston, TX
Internal Medicine, Nephrology (MD) in Houston, Texas, trained at University of Southern California Keck School of Medicine (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $1,599,393 for 3,994 claims, against $209,211 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. was the largest of 17 companies reporting payments in 2025, $2,591 in all, mostly food and beverage.
Overview
| NPI | 1649252529 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 16, 2005 |
| Last updated in NPPES | Jan 19, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | L3016 | TX |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 451 |
|---|---|
| Services billed | 1,874 across 20 procedure codes |
| Paid by Medicare | $209,211 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,994 · 7,450 30-day fills |
|---|---|
| Patients | 592 |
| Total drug cost | $1,599,393 |
| Generic share | 73% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Q-Health Partners PLLCHouston, TX · 19 clinicians
Hospital affiliations
- HCA Houston Healthcare Clear LakeWebster, TX
- HCA Houston Healthcare SoutheastPasadena, TX
- Houston Methodist Clear Lake HospitalNassau Bay, TX
- Memorial Hermann Hospital SystemHouston, TX
- St Luke's Patients Medical CenterPasadena, TX
Other facilities
- Fkc Texas City Dialysis CenterDialysis facility · Texas City, TX
- Fmc Houston HomeDialysis facility · Houston, TX
- Fresenius Kidney Care Sandcastle Dialysis CenterDialysis facility · Texas City, TX
- Aqua Dialysis League City LLCDialysis facility · League City, TX
Industry payments (Open Payments)
- 2025$2,591 · 128 payments from 17 companies
- 2024$2,090 · 134 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $322.93 | 22 |
| Opko Pharmaceuticals, LLC | $303.32 | 24 |
| Astrazeneca Pharmaceuticals LP | $246.82 | 19 |
| Mallinckrodt Hospital Products Inc. | $240.20 | 9 |
| Travere Therapeutics, Inc. | $231.88 | 2 |
What the 2025 payments were for
- Food and Beverage$2,591 · 128 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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