Dr. George Nassar is a nephrologist practicing in Houston, TX who specializes in the care and treatment of all aspects of kidney disease. Dr. Nassar has achieved the position of Professor of Clinical Medicine due to his broad expertise in kidney disease management, educational skills, teaching, and research activities. Dr. Nassar treats conditions like chronic kidney disease, acute kidney failure, Polycystic kidney disease, high blood pressure, kidney stones, electrolyte abnormalities, and more. Specifically, Dr. Nassar has extensive experience in management of diabetic kidney disease, kidney disease in the context of heart disease, and fluid overload states. Dr. Nassar has expertise in kidney transplantation, and all types of dialysis modalities. Additionally, Dr. Nassar is Nationally known for his expertise in dialysis vascular access management. Dr. Nassar is well published in peer-reviewed journals. Dr. Nassar is well liked by his patients who find him personable, attentive, caring, effective, and professional.
Dr. George M. Nassar, MD, FACP, FASN's Videos
Education and Training
American University of Beirut Faculty of Medicine in Lebanon Medical Degree 1988
Emory University Internal Medicine Residency 1992
Emory University, Atlanta Nephrology Fellowship 1995
American Board of Internal Medicine (ABIM)
Internal MedicineAmerican Board of Internal MedicineABIM- Nephrology
Dr. George M. Nassar, MD, FACP, FASN's Expert Contributions
Go to hospital if you have pain over the kidney and high grade fever. If you have chills, vomiting, drop in blood pressure, dizziness, vomiting, decreased urine output or blood in urine. READ MORE
Depends on their size and composition. Large size stone might not pass easily and safely. READ MORE
Depends on the severity of infection. For mild infection, may take antibiotics for 5-7 days, but for severe infections, might need 2 weeks and frequently IV antibiotics. READ MORE
Best to ask the urologist who will be conducting the stone removal and under what conditions, and what actual procedure is being done. READ MORE
Usually not, but limited damage might occur. READ MORE
Usually 6 hrs or overnight depending on the facility policy. But if a complication happens like bleeding, you have to stay until the complications are under control. READ MORE
This seems like a urine infection. Check with your doctor, and do a urine culture and U/A. READ MORE
It is not easy to give you an answer. You are already seeing a GU specialist. Over time, you might end up needing a urologist who subspecializes in your type of problems. Since I am a nephrologist, I might not be able to add to what kind of care you are getting. READ MORE
If the pain is severe, going to the ER would be a good idea to get control of the pain. Also, an U/S or CT scan can be done to make sure there is no obstruction of the urinary tract. The latter is a dangerous condition that can lead to infection of loss of the kidney function. READ MORE
Urologists may remove kidney stones if accessible by going from the urethra to the bladder then to the ureter and can put a stent to better drain the tract and can retrieve an accessible stone by a basket. If it fails, then Lithotripsy might be needed and if all above fail and the stone needs to be removed, then surgery would be needed. READ MORE
I think it is high success. Each case has to be discussed with the Urologist depending on the size and location. READ MORE
Pain in the side, flank, private area, or blood in urine or infection, READ MORE
Antibiotics would need to be taken. Sometimes, a prolonged course might be needed. READ MORE
These days CT scan are done very fast. It might take only 10 min or less in the scanner (I believe). READ MORE
Compare your result (BUN and Cr) to the normal range. But if you had a previous lab, you should compare it to the previous result to see if there is a change. Also, the urine is important to look for any protein, blood, or WBCs. protein in urine is bad. Blood is not good either and WBC at times could mean infection. You would need help from your physician to interpret. READ MORE
We don't use the term (tiny spot) in medicine. We can things: cyst, mass, focus of calcification, etc. Spot could be anything, but I suspect it is benign. The language of the U/S report is very important. At times when the radiologist is concerned, they say in the report, a 6 month follow up is needed or a CT scan with contrast is needed. But if they are not concerned, they simply say simple and benign and don't recommend follow up. READ MORE
Best to have a colonoscopy if blood is passing from the rectum and you are 48. May be you should get your first colonoscopy. It could be as simple as hemorrhoids though in your case. READ MORE
Depends on the injury, and its severity and baseline kidney function. May also vary if there is repetitive kidney injury. But one injury maybe 2-4 weeks needed to recover. READ MORE
In general drinking water is good for kidneys unless you have heart disease, liver disease of kidney disease or a condition called hyponatremia. The latter means low concentration of sodium on blood tests. READ MORE
Can't tell for sure. It may resolve in 1-2 weeks on its own if you are super healthy and drinking lots of fluid, but may not go away, and in that case, you would need antibiotics. Also, did you have symptoms of urine infection? or the infection was simply discovered on urine testing and the doctor told you that you have an infection. The latter could be an asymptomatic infection, and its treatment is a judgment call. But if you had symptoms of UTI, best to treat. READ MORE
Expert PublicationsData provided by the National Library of Medicine
- Images in clinical medicine. Brown tumor in end-stage renal disease.
- Clotted arteriovenous grafts: a silent source of infection.
- Reciprocal regulation of LTA(4) hydrolase expression in human monocytes by gamma-interferon and interleukins 4 and 13: potential relevance to leukotriene regulation in glomerular disease.
- Infectious complications of the hemodialysis access.
- Occult infection of old nonfunctioning arteriovenous grafts: a novel cause of erythropoietin resistance and chronic inflammation in hemodialysis patients.
- Infectious complications of old nonfunctioning arteriovenous grafts in renal transplant recipients: a case series.
- Presence of a failed kidney transplant in patients who are on hemodialysis is associated with chronic inflammatory state and erythropoietin resistance.
- Salvage of a severely dysfunctional arteriovenous fistula with a strictured and occluded outflow tract.
- What should nephrologists do to maximize the use of arteriovenous fistulas?
- Endovascular treatment of the "failing to mature" arteriovenous fistula.
- Intravenous methoxy polyethylene glycol-epoetin beta for haemoglobin control in patients with chronic kidney disease who are on dialysis: a randomised non-inferiority trial (MAXIMA).
- Postdialysis outcomes associated with consistent anemia treatment in predialysis patients with chronic kidney disease.
- Endovascular management of the "failing to mature" arteriovenous fistula.
- Preventing and treating inflammation: role of dialysis access management.
Areas of expertise and specialization
Faculty Titles & Positions
- Professor of Clinic Medicine Houston Methodist Hospital 2018 - Present
- Professor of Clinical Medicine Weill Cornell Medicine 2018 -
- Clinical Educator Texas A&M University 2015 -
- Key Faculty Nephrology Fellowship Program at Houston Methodist Hospital 2012 -
- Compassionate Doctor Recognition (2014, 2015) Year
- Patients’ Choice Award (2014, 2016, 2018) Year
- On-Time Doctor Award (2014, 2016, 2018) Year
- ASDIN (2014, 2019) Year
- American Society of Nephrology
- American Society and Diagnostic and Interventional Nephrology
- American College of Physicians
- Harris County Medical Society
- Emory University School of Medicine Nephrology 1995
- Emory University School of Medicine (Nephrology Fellowship) (1995)
Professional Society Memberships
- American College of Physicians, Harris County Medical Society, American Society and Diagnostic and Interventional Nephrology
- Dr. Nassar has published several manuscripts on various aspects of kidney disease management and dialysis access management. He has also been a national speaker and consultant on hypertension, congestive heart failure, metabolic bone disease, diabetic kidney disease, dialysis vascular access, and anemia treatment in patients with kidney failure.
Areas of research
Dialysis associated bone disease
Dialysis associated hyperkalemia
Dialysis associated hyperphosphatemia
Anemia of Kidney Disease
Dialysis Vascular Access
Diabetic kidney disease
Dr. George M. Nassar, MD, FACP, FASN's Practice location
Dr. George M. Nassar, MD, FACP, FASN's reviewsWrite Review
Patient Experience with Dr. Nassar
Get to know Nephrologist Dr. George M. Nassar, who serves patients in Houston, Texas.
Well liked by his patients who find him personable, attentive, caring, effective, and professional, Dr. Nassar is a nephrologist at The Kidney Institute in Houston, Texas. Collectively, he and his colleagues provide reputable inpatient and outpatient nephrology services in the Texas Medical Center and in North Houston and The Woodlands.
Trained in all aspects of general Internal Medicine and nephrology, Dr. Nassar has 25 years of experience in managing acute and chronic kidney disease, polycystic kidney disease, diabetic kidney disease, electrolyte abnormalities, lupus nephritis, fluid overload states, hypertension, kidney stone disease, dialysis, and kidney transplantation. In addition, he has gained an incredible amount of expertise in interventional aspects of dialysis access management.
Among his academic titles, he is a Professor of Clinical Medicine at the Institute of Academic Medicine at Houston Methodist Hospital (6/2018-present), a Professor of Clinical Medicine at Weill Cornell Medicine (12/2018-present), a Clinical Educator at Texas A&M University (2015-present), and on the key faculty of the Nephrology Fellowship Program at Houston Methodist Hospital (2012-present).
Locally, Dr. Nassar’s main hospital practice is in the Houston Methodist Hospital but he also manages patients in Baylor St. Luke’s Medical Center and Kindred Hospital-Houston Medical Center. His outpatient clinic is in The Kidney Institute located in Scurlock Tower on Fannin Street in the Texas Medical Center. He also has privileges in many Houston based dialysis units.
The doctor’s acclaimed career in medicine began after he earned his medical degree from the American University of Beirut Faculty of Medicine in Lebanon in 1988. He then went on to perform his residency in internal medicine and his fellowship in nephrology at the Emory University School of Medicine in 1992 and 1995, respectively.
With a commitment to excellence, Dr. Nassar is board-certified in internal medicine and nephrology by the American Board of Internal Medicine (ABIM). The ABIM is a physician-led, non-profit, independent evaluation organization driven by doctors who want to achieve higher standards for better care in a rapidly changing world.
Continuously advancing his efforts, he is an active member of the American College of Physicians, the American Society of Nephrology (Fellow), the Harris County Medical Society, and the American Society and Diagnostic and Interventional Nephrology (ASDIN).
With longstanding expertise in multicenter clinical trial research, Dr. Nassar has published several manuscripts on various aspects of kidney disease management and dialysis access management. He has also been a national speaker and consultant on hypertension, congestive heart failure, metabolic bone disease, diabetic kidney disease, dialysis vascular access, and anemia treatment in patients with kidney failure.
Nephrology is a specialty of medicine and pediatrics that concerns itself with the kidneys. It is the study of normal kidney function and kidney disease, the preservation of kidney health, and the treatment of kidney disease, from diet and medication to renal replacement therapy. Nephrologists have advanced training in treating kidney disease. They diagnose and treat kidney failure, as well as help patients by prescribing medications, offering special diet advice, and coordinating dialysis care or kidney transplantation when it becomes necessary.
Among his various accolades, Dr. Nassar has been the recipient of Compassionate Doctor Recognition (2014, 2015), Patients’ Choice Award (2014, 2016, 2018), and On-Time Doctor Award (2014, 2016, 2018). He is also the recipient of first abstract awards on his research in dialysis access from the ASDIN (2014, 2019).
On a more personal note, Dr. Nassar speaks fluent English and Arabic. He also manages to speak some Spanish, and tries to learn more Spanish with every Spanish-Speaking patient-encounter.
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