George M. Nassar, MD
NPI 1639171416ActiveIndividual· Internal Medicine, Nephrology· Houston, TX
Internal Medicine, Nephrology (MD) with Legacy Healthcare Services Inc and 1 other group, practicing in Houston, Texas. Their prescriptions cost Medicare Part D more than their services did: $725,182 for 4,050 claims, against $223,601 paid for services in 2024. Lilly USA, LLC was the largest of 26 companies reporting payments in 2025, $18,461 in all, mostly speaking and faculty fees. Lists Houston Methodist Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1639171416 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 11, 2005 |
| Last updated in NPPES | Dec 13, 2022 |
| Certified by provider | Dec 13, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | K4168 | 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 | 398 |
|---|---|
| Services billed | 2,870 across 46 procedure codes |
| Paid by Medicare | $223,601 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,050 · 8,736 30-day fills |
|---|---|
| Patients | 434 |
| Total drug cost | $725,182 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Legacy Healthcare Services IncGreenville, SC · 3,223 clinicians
- Nephrology Dialysis and Transplantation Associates PAHouston, TX · 16 clinicians
Hospital affiliations
- Houston Methodist HospitalHouston, TX
- Houston Methodist Sugarland HospitalSugar Land, TX
- Houston Methodist the Woodlands HospitalThe Woodlands, TX
- Houston Methodist West HospitalHouston, TX
- Houston Methodist Willowbrook HospitalHouston, TX
Other facilities
- Davita Ace DialysisDialysis facility · Humble, TX
- Davita Inwood DialysisDialysis facility · Houston, TX
- Davita Jensen DialysisDialysis facility · Houston, TX
- Davita Northstar Dialysis CenterDialysis facility · Houston, TX
- Fresenius Medical Care North Shepherd LLCDialysis facility · Houston, TX
- Axon Home HealthHome health agency · Katy, TX
Industry payments (Open Payments)
- 2025$18,461 · 104 payments from 26 companies
- 2024$37,053 · 127 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $7,905 | 8 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $5,756 | 8 |
| Amgen Inc. | $2,268 | 4 |
| Mallinckrodt Hospital Products Inc. | $349.09 | 6 |
| Novartis Pharmaceuticals Corporation | $286.70 | 9 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$13,335 · 9 payments
- Food and Beverage$2,760 · 91 payments
- Consulting Fee$2,200 · 1 payment
- Education$166.83 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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