Dr. George M. Nassar, MD

  • Houston, TX
  • Nephrologist
NPI1639171416PAC ID1153385810
Medicare services, 2024
2,732
Medicare patients, 2024
398
Part D claims, 2024
4,050
Publications
43
MIPS score, 2024
93
Practice address
380 W Little York, Houston, TX 77076
Practice phone
Call (281) 448-4506
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

DaVita Northstar Dialysis Center

Dialysis Center - Independent · Houston, Texas

See all 15 affiliations

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Dr. George M. Nassar is a nephrologist in Houston, Texas

Dr. Nassar practices at DaVita Northstar Dialysis Center in Houston, Texas.

Dr. Nassar's NPI, 1639171416, was assigned on August 11, 2005. Dr. Nassar graduated from American University of Beirut Faculty of Medicine in 1988. Dr. Nassar holds Texas license K4168.

NPI and contact details
Medicare PAC ID
1153385810
NPI enumeration date
August 11, 2005
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(281) 448-4506
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
64
Medical school graduation
1988

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. George M. Nassar practices at DaVita Northstar Dialysis Center in Houston, Texas

Dr. Nassar's primary practice is DaVita Northstar Dialysis Center, at 380 W Little York, Houston, TX 77076 in Harris County. The practice phone is (281) 448-4506.

  • DaVita Northstar Dialysis Center
    380 W Little York, Houston, TX 77076 · Harris CountyPhone(281) 448-4506

Source: Dmand AI Affiliation Data

Dr. George M. Nassar is affiliated with 13 sites of care and 2 medical groups

Dr. Nassar's primary practice is DaVita Northstar Dialysis Center in Houston, Texas. Dr. Nassar is also affiliated with Houston Methodist Hospital. The medical group on file is Legacy Healthcare Services. Dmand AI also links Dr. Nassar to 4 more hospitals, 4 dialysis centers, 2 group practices and clinics, 1 home health agency and 1 medical group, each named with a free account.

See all 15 affiliations for Dr. Nassar

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. George M. Nassar's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nassar practices, 13 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
DaVita Northstar Dialysis CenterAvailable with a free account
+12 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. George M. Nassar is one of 1,045 nephrologists in Texas

Nephrology is Dr. Nassar's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Nassar is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Nassar's licenses on file in 2 states: Texas and Georgia.

Specialties and state licenses

  • Nephrology, TexasPrimaryLicense K4168 · 1997 to 2026 · taxonomy 207RN0300X
  • Georgia license1993 to 1997

Clinical focus

Dmand AI lists chronic kidney disease, fluid and electrolyte imbalances and kidney cysts among the conditions Dr. Nassar treats.

Nephrologists near Dr. Nassar

Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. George M. Nassar billed Medicare for 2,732 services in 2024

CMS data shows 2,732 Medicare services from Dr. Nassar across 20 procedure codes in 2024, for 398 Medicare patients. Medicare paid $185,013 for them.

Medicare services, 20242,732
Medicare patients398
Paid by Medicare$185,013
Procedure codes20

Dr. Nassar's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Other services
2023: 1,4502024: 1,3636%
Office and hospital visits
2023: 1,1212024: 97013%
Tests and treatments
2023: 3622024: 3826%
Surgery
2023: 242024: 1729%
Imaging
2023: 142024: 0100%

Where Dr. Nassar's Medicare services took place, 2024

  • In an office2,36787%
  • In a facility36513%

Dr. Nassar compared with the Texas median for nephrologists, 2024

  • Dr. Nassar
  • Texas median
Medicare services
2,732vs 1,0482.6 times
Medicare patients
398vs 27744% above
Part D claims
3,672vs 7584.8 times

Medians across 1,017 nephrologists in Texas with Dmand AI profiles that report each measure.

Dr. Nassar's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Nassar

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nassar and other nephrologists in Texas.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. George M. Nassar treated 398 Medicare patients in 2024, average age 65

CMS counts 398 Medicare patients who saw Dr. Nassar in 2024. The largest group is under 65, with 162 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 21% are also on Medicaid. Their average risk score is 5.47, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Nassar's median patient age at 66, with 46% women.

Medicare patients, 2024398
Average age65
Average risk score5.47
Also on Medicaid21%

Dr. Nassar's Medicare patients by age, 2024

Dr. Nassar's Medicare patients by sex, 2024

  • Women16040%
  • Men23860%

Chronic conditions among Dr. Nassar's Medicare patients, 2024

  1. Chronic kidney disease75%
  2. High blood pressure75%
  3. High cholesterol75%
  4. Diabetes67%
  5. Ischemic heart disease51%
  6. Heart failure49%
  7. Arthritis33%
  8. Atrial fibrillation29%

Share of Medicare patients with each condition. A patient can have several.

Dr. Nassar's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 66

Patient panel by sex, all payers

  • Women46%
  • Men53%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. George M. Nassar wrote 4,050 Medicare Part D claims in 2024

In 2024, Dr. Nassar wrote 4,050 Medicare Part D claims for 434 patients. 90% of them were for generic drugs. CMS names the drug for 3,672 of them, across 74 drugs with 11 or more claims each, at $537,023 in total drug cost. In 2023, CMS named 3,200 claims across 69 drugs.

Part D claims, 20244,050
Drugs named by CMS74
Total drug cost$537,023
Part D patients434

Dr. Nassar's Part D claims by kind of drug, 2024

  • Generic3,627 claims90%
  • Brand-name and other423 claims10%

Dr. Nassar's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Nassar's Part D claims, 2024

  • Opioids0%13 of 4,050 claims
  • Antibiotics3%129 of 4,050 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 3,2002024: 3,67215%

Drugs named by CMS: 74 in 2024, 69 in 2023.

See all prescribing by Dr. Nassar

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. George M. Nassar scored 93 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Nassar for performance year 2024, reported as part of a group. Dr. Nassar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nassar as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Nassar's MIPS scores, performance year 2024

  • 93of 100Final score
  • 85.3of 100Quality
  • 98of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 71of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

For MedTech and pharma teams

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Dr. George M. Nassar has 43 publications on record

Dmand AI links 43 papers to Dr. Nassar, published from 2006 to 2024. 2019 was the busiest year, with 4. The most frequent topics are Renal Dialysis, Arteriovenous Shunt, Surgical and Graft Occlusion, Vascular. Dr. Nassar has published most often in J Vasc Access. Dr. Nassar's most frequent co-authors are Gerald A. Beathard, MD, Luan Dinh Truong, MD and Katafan A. Achkar, MD.

Papers43
Years published2006 to 2024

Dr. Nassar's papers by year, 2006 to 2024

Topics Dr. Nassar writes about most

  • Renal Dialysis
  • Arteriovenous Shunt, Surgical
  • Graft Occlusion, Vascular
  • Blood Vessel Prosthesis
  • Kidney Failure, Chronic
  • RNA, Messenger
  • Vascular Patency
  • Anemia

Dr. Nassar's most frequent co-authors

Recent publications by Dr. Nassar

See all 43 publications and co-authors

See who Dr. Nassar researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nassar works with, so you can find a warm path to the right nephrologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. George M. Nassar received $75,929 in industry payments from 2016 to 2025

CMS Open Payments shows 660 general payments to Dr. Nassar from 57 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 61% of the total. Eli Lilly and Company paid the most, $23,531. It also lists 16 research payments totaling $1,208 in 2019.

General payments to Dr. Nassar by program year, 2016 to 2025

General payments to Dr. Nassar by kind, 2016 to 2025

$75.9Kin total
  • Speaker and faculty fees$46,57061%
  • Food and beverage$17,66323%
  • Consulting fees$9,73313%
  • Travel and lodging$1,2472%
  • Education$7171%

Companies that paid Dr. Nassar the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Nassar

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. George M. Nassar has 1 award and honors on record

Dmand AI lists 1 award for Dr. Nassar.

Awards and honors for Dr. Nassar

  1. Undated
    • ASN Fellow

Source: Dmand AI Professional Profile Data

Dr. George M. Nassar graduated from American University of Beirut Faculty of Medicine

Dr. Nassar graduated from American University of Beirut Faculty of Medicine in 1988. Dr. Nassar is a member of ACP, American Society of Diagnostic and Interventional Nephrology- ASDIN and ASN.

  1. Medical schoolAmerican University of Beirut Faculty of Medicine
  2. Board certified in internal medicineAmerican Board of Internal Medicine
  3. Board certified in nephrologyAmerican Board of Internal Medicine
  4. Board certified in interventional nephrolgyASDIN

Source: Dmand AI Professional Profile Data

Dr. George M. Nassar accepts plans from 23 insurance carriers

Dr. Nassar is in network with 23 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.

Plan types Dr. Nassar accepts, by number of carriers

  1. PPO14
  2. HMO13
  3. Medicare11
  4. EPO4
  5. POS4
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. George M. Nassar's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. George M. Nassar

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. George M. Nassar's NPI number?

Dr. George M. Nassar's NPI number is 1639171416. It was assigned on August 11, 2005, and it is active in the NPI Registry.

What kind of doctor is Dr. George M. Nassar?

Dr. George M. Nassar is a nephrologist in Houston, Texas. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).

Where does Dr. George M. Nassar practice?

Dr. Nassar practices at 380 W Little York, Houston, TX 77076. Dr. Nassar's primary practice is DaVita Northstar Dialysis Center in Houston, Texas. Dmand AI also links Dr. Nassar to 4 hospitals, 4 dialysis centers, 2 group practices and clinics, 1 home health agency and 1 medical group.

What is Dr. George M. Nassar's office phone number?

The practice phone on file for Dr. Nassar is (281) 448-4506.

What is Dr. George M. Nassar's medical license number?

Dr. Nassar holds Texas license K4168, one of the licenses on file in 2 states.

Which states has Dr. George M. Nassar been licensed in?

Dmand AI has state licenses on file for Dr. Nassar in Texas (1997 to 2026) and Georgia (1993 to 1997).

Which hospitals is Dr. George M. Nassar affiliated with?

Dr. Nassar is affiliated with Houston Methodist Hospital. Dmand AI links Dr. Nassar to 4 more hospitals.

What medical group is Dr. George M. Nassar part of?

Dr. Nassar is linked to Legacy Healthcare Services. Dmand AI links Dr. Nassar to 1 more medical group.

Does Dr. George M. Nassar accept Medicare?

Yes. CMS data shows Dr. Nassar billed Medicare for 2,732 services in 2024, and Dr. Nassar accepts Medicare assignment.

Does Dr. George M. Nassar offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Nassar as offering telehealth services.

Show 11 more questionsShow fewer questions

What is Dr. George M. Nassar's MIPS score?

Dr. Nassar's MIPS final score for performance year 2024 is 93 out of 100, reported as part of a group.

How many Medicare patients does Dr. George M. Nassar see?

CMS counts 398 Medicare patients who saw Dr. Nassar in 2024, with an average age of 65.

Is Dr. George M. Nassar board certified?

Yes. Dr. Nassar is board certified in internal medicine by the American Board of Internal Medicine.

What services does Dr. George M. Nassar bill to Medicare?

In 2024, Dr. Nassar's most billed Medicare services were medicare temporary code (Q9967), office visit, established patient (99214) and medicare service (G2211).

Where did Dr. George M. Nassar go to medical school?

Dr. Nassar graduated from American University of Beirut Faculty of Medicine in 1988.

What drugs does Dr. George M. Nassar prescribe most?

In 2024 Medicare Part D data, Dr. Nassar's most prescribed drugs by claims were Prednisone, Losartan Potassium and Cinacalcet HCl.

Has Dr. George M. Nassar received payments from drug or device companies?

CMS Open Payments shows $75,929 in general payments to Dr. Nassar from 57 companies from 2016 to 2025. The largest total came from Eli Lilly and Company.

How long has Dr. George M. Nassar been practicing?

Dr. Nassar graduated from medical school in 1988, 38 years ago.

Does Dr. George M. Nassar do research?

Dmand AI links 43 publications to Dr. Nassar, published from 2006 to 2024.

Who does Dr. George M. Nassar publish with?

Dr. Nassar's most frequent co-authors are Gerald A. Beathard, MD (9 shared papers), Luan Dinh Truong, MD (5 shared papers) and Katafan A. Achkar, MD (4 shared papers).

What insurance does Dr. George M. Nassar accept?

Dr. Nassar is in network with 23 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.

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