PLEASE FAX THE FOLLOWING ITEMS:
- Last 3 Office Visit Notes
- Medication List
- Any imaging reports of the kidney
- 1 years' worth of urine and blood lab results
- Demographic Sheet
- Referral Note from Physician
We use EPIC/Acumen as our Electronic Medical Record system
For providers looking to refer a patient, here are some common identifiers for patients that need to be seen by a nephrologist.
- ANY patient with kidney disease
- Progression of CKD
- ANY patient with a GFR < 60 m/min
- ANY patient with an auto-immune disease
- Blood in the urine
- Difficult to treat edema
- Persistent electrolyte abnormalities DESPITE intervention
- Acid-Base disturbances requiring assistance
- Recurrent kidney stones
- Proteinuria/Albuminuria independent of ANY eGFR
- Acute Kidney Injury
- Albumin/Creatinine Ratio > 30 mg/g
- Vasculitis with renal manifestations
- Hereditary kidney disease
- Hypertension refractory to treatment with 4+ antihypertensive agents
- Urinary red cells casts not readily explained
Our Physicians and Medical staff are standing by to help answer your questions. Please feel free to call us at any time with questions regarding a consult.
Accepting New Patients
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Shariq Ahmad, M.D.
Shariq Ahmad, M.D.
Dr. Shariq Ahmad graduated from Dow Medical College in 1991. He completed his residency at Englewood Hospital and Medical Center in New Jersey and his fellowship in nephrology at the University of Mississippi Medical Center in Jackson, MS. He has recently joined the Nephrology Associates team from Naples, Florida and will begin practicing in June of 2022. He has over 25 years’ experience in practicing medicine and nephrology. He has special interest in intensive care nephrology, hypertension, and internal medicine. He has excellent interpersonal and communication skills. He has had many successful leadership experiences, especially involving medical team, practice development and has served in a wide variety of professional and administrative roles.
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Marcellus Assiago, M.D.
Marcellus Assiago, M.D.
Marcellus Assiago MD went to Moi University Medical School, Eldoret Kenya. His Internal Medicine training was at Lehigh Valley Hospital and Health Network, Allentown, Pennsylvania from 2003 to 2006. He completed his fellowship training in 2008 at Tufts Medical Center, Boston, Massachusetts, specializing in Nephrology and Hypertension. Upon completion of his fellowship, he joined the Department of Medicine, Division of Nephrology at the University of Utah. We are excited to welcome him to the Nephrology Associates of Utah team, he will be practicing in Salt Lake, Utah Valley and the St George, Cedar City areas.
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Andrew Cortez, D.O.
Andrew Cortez, D.O.
Dr. Andrew Cortez attended medical school at Western University of Health Sciences. He completed his internal medicine residency at Maricopa Medical Center in 2000 and his nephrology fellowship at the Medical College of Georgia in 2005. He has been a vital part of many nephrology research projects since 2007 and has had multiple publications in medical journals throughout his career. Dr. Cortez joined Nephrology Associates of Utah in February 2022. He joins us from Arizona where he has had a fabulous reputation practicing nephrology since 2005.
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Landon Dickson, M.D.
Landon Dickson, M.D.
Landon Dickson, M.D., is a native of Salt Lake City, Utah. He obtained his medical degree from the University of Utah in 2008. He completed his residency in Internal Medicine at Indiana University and his fellowship in Nephrology at Indiana University where he was Chief Fellow. Dr. Dickson is board certified in Internal Medicine and Nephrology. He is a fellow of the American College of Physicians.
Dr. Dickson has worked with Nephrology Associates of Utah since 2013. He is an adjunct community faculty member at the University of Utah School of Medicine and the medical director of West Salt Lake Dialysis. He is involved in clinical research, trying to improve the quality of healthcare delivered to patients. His interests are in slowing the progression of chronic kidney disease, resistant hypertension, kidney stone prevention, polycystic kidney disease, kidney disease in pregnancy, geriatric kidney disease, hemodialysis, and home dialysis. He is fluent in English and Spanish. In his free time, he enjoys spending time with his wonderful wife and 5 children, playing jazz piano, fly fishing, and skiing.
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Arasu Gopinath, M.D.
Arasu Gopinath, M.D.
Arasu Gopinath, M.D. obtained his medical degree from Kilpauk Medical College in 1992. He completed his residency in Internal Medicine from University of Connecticut and Nephrology fellowship from University of Pennsylvania.
Dr. Gopinath has worked with Nephrology Associates of Utah since 2009. His special interests are chronic kidney disease, peritoneal and hemodialysis, and hypertension. His foreign languages include Tamil. Dr. Gopinath is board certified in Internal Medicine and Nephrology.
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Ruth Indahyung, M.D.
Ruth Indahyung, M.D.
Dr. Indahyung obtained her medical degree from Gadjah Mada University, where she was awarded for graduating at the top of her class. She completed her residency in Internal Medicine at Harbor Hospital, Baltimore in 2008. She then completed her fellowship and chief fellowship in Nephrology at the University of Florida in Gainesville, FL in 2010.
Dr. Indahyung serves as the Medical Director of South Mountain Dialysis, recognized as one of model facilities promoting health and improving quality of life by the Center for Medicare and Medicaid/CMMS. Additionally, she conducts clinical research in the areas of anemia of chronic kidney disease, treatment for Focal Segmental Glomerulosclerosis (FSGS), and atypical hemolytic-uremic syndrome (HUS). Her special interests include chronic kidney disease; acute kidney injury; secondary hypertension; glomerulonephritis; dialysis and kidney stones.
Dr. Indahyung joined Nephrology Associates of Utah in 2012 and is board certified in Internal Medicine and Nephrology.
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Sey Lau, M.D.
Sey Lau, M.D.
Dr. Lau is currently the medical director of the Wasatch Artificial Kidney Center of Fresenius Medical Care. A native of Canada, she received her Medical Degree from the University of Ottawa, in Ontario, Canada. Thereafter, she completed her Internal Medicine residency and Nephrology & Hypertension fellowship at the Cleveland Clinic.
Dr. Lau is board certified in Nephrology. In addition to the practice of general nephrology, her interests include management of chronic kidney disease and glomerulonephritis. Dr. Lau joined Nephrology Associates of Utah in 2008.Prior to her medical career, Dr. Lau was a member of the Canadian National Gymnastics team and graduated Magna Cum Laude in Microbiology from the Ohio State University as a varsity student athlete competing in NCAA Women’s Gymnastics. Her interests outside of her career include mountain biking, photography and orchid growing.
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James Shaffner, D.O.
James Shaffner, D.O.
Dr. James Shaffner is a nephrologist specializing in kidney disease at Nephrology Associates of Utah in Salt Lake City.
He graduated Magna Cum Laude from the Ohio State University with a Bachelor of Science and a minor in Business. He attended medical school at the Lake Erie College of Medicine in Bradenton, Florida, completed his internship at the St. Petersburg General Hospital in St. Petersburg, Florida, and his internal medicine residency at Medical City Weatherford in Ft. Worth, Texas. Subsequently, Dr. Shaffner completed his nephrology fellowship at the University of Toledo in Toledo, Ohio.
Dr. Shaffner's clinical interests include ICU care, electrolyte disturbances, acute kidney injury, chronic kidney disease, hypertension, diabetes-related kidney disease, glomerular disease, renal transplant management, and ESRD.
Dr. Shaffner enjoys spending time with his wife and two children. His interests include pre-war aircraft and automobiles, target shooting, and golf.
Dr. Shaffner joined the team of nephrologists at Nephrology Associates of Utah in January 2023.
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Roman Shingarev, M.D.
Roman Shingarev, M.D.
Dr. Roman Shingarev received his medical degree and completed post-graduate medical training at the University of Alabama at Birmingham, where he remained on faculty as an Interventional Nephrology Program Director. For the next several years, Dr. Shingarev practiced Onco-Nephrology as an Assistant Professor at Memorial Sloan-Kettering Cancer Center and Weill Cornell Medical College in New York and was then recruited to direct an Onco-Nephrology Program at Cleveland Clinic and Case Western Reserve University in Cleveland, where he was appointed as an Associate Professor. He has authored many publications in both Onco-Nephrology and Interventional Nephrology and has served on multiple national committees in these fields.Dr. Shingarev joined NAU in 2023. His professional interests include chronic kidney disease, dialysis vascular access and kidney complications of cancer and cancer treatment. -
Indraneel Mogarala, M.D.
Indraneel Mogarala, M.D.
Dr. Indraneel Mogarala, MD, is a board-certified nephrologist who joined Nephrology Associates of Utah in June 2024. Dr. Mogarala completed his medical degree at Kasturba Medical College in Manipal, India, and went on to complete his internal medicine residency at Michigan State University’s Hurley Medical Center in Flint, MI. He pursued advanced training with a nephrology fellowship at the University of Texas Health Science Center in Houston.With over a decade of experience, including his recent practice at South Texas Renal Care Group, Dr. Mogarala is dedicated to providing comprehensive kidney care. His clinical interests include managing chronic kidney disease, hypertension, and electrolyte disorders. Dr. Mogarala is known for his compassionate approach and commitment to patient-centered care, now proudly serving the Utah community. -
Ron Zuiderweg, D.O.
Ron Zuiderweg, D.O.
Dr. Zuiderweg is a dedicated Nephrologist who received his medical degree from Touro University in Vallejo, California in 2001. He completed his medical residency at The Medical College of Wisconsin, where he developed a keen interest in Nephrology. He subsequently undertook his Nephrology Fellowship at the same institution before relocating to Arizona, where he enjoyed a busy and successful practice for over 16 years, earning accolades such as the prestigious "Top Doc" award.
In early 2023, Dr. Zuiderweg moved to Utah and joined Nephrology Associates. He is passionate about providing individualized treatment to each patient and believes in tailoring care to their unique needs and experiences. He has a broad range of expertise in all aspects of nephrology practice, with a particular interest in diabetic kidney disease, acute kidney injury, chronic kidney disease, and prevention of progression through diet and a healthy lifestyle.
Dr. Zuiderweg enjoys spending time with his family and exploring the great outdoors when he's not working. He is an avid skier, mountain biker, hiker, and horseback rider and is thrilled to be living in Utah, where he can pursue these activities to his heart's content.
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Trenton Gray, FNP-BC, CNN-NP
Trenton Gray, FNP-BC, CNN-NP
Trenton Gray, FNP-BC, CNN-NP is an Advanced Practitioner with specialized, post-graduate training and certification in Nephrology. He is distinguished as one of only ~120 APRN’s throughout the entire nation to hold a certification as CNN-NP from the Nephrology Nursing Certification Commission. He has specialized experience in nephrology including: hypertension management, specialized dialysis care (peritoneal and hemodialysis), CKD-bone mineral disease, acute kidney injury, and chronic kidney disease management. His primary background prior to moving into nephrology was in critical care nursing. He has strong acute illness management and planning skills that he acquired while working at North Mississippi Medical Center – Tupelo, the largest non-metropolitan hospital in the United States with over 650 beds and a very high acuity of patients as a regional referral center. He has been designated Lead Clinical Supervisor for our team of nurse practitioners.