DR. GEORGE M NASSAR (MD) – Nephrology Physician, NPI 1639171416
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,168 NEPHROLOGY in TX
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Provider Addresses for DR. GEORGE M NASSAR (MD)
4226 EMORY AVE
HOUSTON, TX 770051923
Phone: (713) 663-6684
Type: Mailing
1415, La Concha Lane, Texas Medical Center, Houston, Harris County, Texas, 77054, United States
HOUSTON, TX 770541801
Phone: (713) 790-9080
Fax: (713) 790-1664
Type: Location
6560 FANNIN ST STE 1824
HOUSTON, TX 770302735
Phone: (713) 790-9080
Fax: (713) 790-0766
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 225 Open Payments records for all available years, with a total value of $39,453.
Total Amount is formed as General ($39,453) + Research ($0) + Ownership ($0) = $39,453.
Last reported payment date: 2024-12-18 • Largest payer in this snapshot: Lilly USA, LLC ($15,626).
Total Amount
$39,453
General + Research + Ownership
Payments
225
Total payment records
General Amount
$39,453
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-18
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $15,626 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $13,686 |
| Novartis Pharmaceuticals Corporation | $5,201 |
| Otsuka America Pharmaceutical, Inc. | $583 |
| AstraZeneca Pharmaceuticals LP | $396 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2011-01-11
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20110111000939 | I | Nephrology | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 1,450 | 15 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 483 | 224 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 351 | 112 | $0 |
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 183 | 29 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 109 | 71 | $0 |
Insurance plans in this area (ZIP 77005)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| N E P H R O L O G Y | TX | |
| - | TX | |
| Nephrology, Internal Medicine | TX | |
| Registered Dietitian Or Nutrition Professional | TX | |
| Nephrology, Internal Medicine | TX | |
| Nephrology, Internal Medicine | TX | |
| Nephrology, Internal Medicine | TX | |
| Nephrology, Internal Medicine | TX | |
| Nephrology, Internal Medicine | PA | |
| Nephrology, Internal Medicine | TX |
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