ABOUT THE PRACTICE
Our Practice
At Midwest Nephrology, the total patient is our primary concern. We strive to provide excellent medical care to each patient in a personal and friendly environment.
Since 2003, we have been serving our community and caring for those affected by kidney disease. From early kidney disease to post transplant care, our board certified physicians are able to meet your needs and provide individualized treatment. We are on staff and care for our patients at area hospitals; St. Joseph's in St. Charles, Barnes-Jewish in St. Peters and St. Joe's West in Lake St. Louis.
We are celebrating our 20th year in business, serving the needs of renal patients in St. Charles and St. Louis counties. We are so thankful for the support of our patients, their families and our physician colleagues.
Please joins us in welcoming Zoey Levine, M.D. to our practice. She will be serving patients in our Lincoln County location as well as in our hospital locations and dialysis units. We are thrilled to have her as part of our family.
Our Care Team
Gary Singer, MD
Dr. Singer earned his medical degree and completed his internship and residency in internal medicine at the University of Toronto. He completed research and clinical fellowships in nephrology at Brigham and Women’s Hospital and Harvard Medical School in Boston, Massachusetts.
Dr. Singer has authored articles in peer-reviewed journals and has co-authored several book chapters. He is a member of the American Society of Nephrology, the International Society of Nephrology, the National Kidney Foundation and is President-Elect of the Renal Physicians Association. Dr. Singer has lectured on topics related to chronic kidney disease, dialysis and transplantation, as well as other areas in clinical nephrology.
After five years as the Co-Director of the Renal Transplant Program at Washington University School of Medicine, Dr. Singer formed Midwest Nephrology Associates. His responsibilities also include Medical Directorship with Fresenius Kidney Care.
Dr. Singer is currently serving as President of the Renal Physicians Association.
Furqan Raja, MD
Dr. Raja completed his medical training at Aga Kan Medical College in Pakistan. He returned to Minnesota for his post graduate training, including a residency in Internal Medicine and a Renal Fellowship at the University of Minnesota.
He has written various articles for scientific journals. He is a member of the Renal Physicians Association, American Society of Nephrology and the National Kidney Foundation.
He joined a multi-specialty medical group in Duluth, Minnesota which had a large nephrology practice and dialysis population. He served as a Nephrologist and had Medical Directorships with Fresenius Medical Care.
In 2010 he moved to St. Louis and joined physician partners Gary Singer and Dan Young in private practice at Midwest Nephrology Associates. He serves as Medical Director for Fresenius Kidney Care.
Ramez Sunna, M.D.
Dr. Sunna joined Midwest Nephrology in September of 2019. He completed his medical training at the University of Science and Technology in Jordan. Following medical school, he completed an internal medicine residency in in Morristown, New Jersey. He remained there in the role of hospitalist until 2013 when he came to Missouri.
He worked as a hospitalist at the Missouri Delta Medical Center until 2017. He then completed his renal fellowship at Saint Louis University Medical Center, where he served as Chief Fellow.
Dr. Sunna is fluent in English, Arabic and French. He is a member of ASN, NKF, RPA and several medical societies. He is on staff at Barnes St. Peters, St. Joseph Health Center and St. Joe's West in Lake St. Louis. He serves as Medical Director for Encompass Health.
Andrea Latta, APRN
Andrea completed her training as an Advanced Practice Nurse Practitioner at the University of Missouri St. Louis where she received numerous honors.
She joined Gary Singer in Private Practice at Midwest Nephrology in 2005. Prior to this she worked as a Dialysis Nurse for ten years and served as Clinical Manager for Fresenius Kidney Care
She holds memberships in the American Nephrology Nurses Associates, Renal Physicians Association as a committee member and the National Kidney Foundation. She has given talks on renal issues in the community.
Andrea enjoys camping with her family and enjoying the outdoors. We love having her as an anchor at Midwest Nephrology.
Amy Krieg Mosman, PA
Amy came to Midwest Nephrology in September of 2025 after many years in academia.
She completed her education at Saint Louis University , Go Bills!
She is a member of NCCPA PA, Missouri Academy of Physician Assistants, NKF Council of Advanced Practitioners.
Her expertise is far and wide in the areas of research and transplant. A distinguished speaker on the national level, Amy is particularly interested genetics and in patients with hypertension and metabolic disorders.
Amy has an active family life and enjoys traveling. She makes a wonderful addition to our group.
Sara Springer, NP
Sara joined Midwest Nephrology in 2023, having served as a nurse practitioner for several years in a pulmonary practice. Her experience has prepared her to effectively care for our patient population.
She completed her education through Maryville University in 2011. She is an active member of the Renal Physicians Association.
Sara sees patients in our office as well as following patients in the hospital and dialysis units.
Sara is a published author and a wonderful mom to her lovely family. She makes a great addition to our team.
Megan Harkey, NP
Megan came aboard in January of 2026. She is a seasoned Nephrology Nurse Practitioner with diverse experience on the inpatient side as well as outpatient and dialysis.
She was trained at Chamberlin College of Nursing and Maryville University. Megan is a member of St. Louis Nurses in Advance Practice, ASNP, and Sigma Theta Tau.
An avid reader, Megan also enjoys spending time outdoors with her young family and attending STL sporting events. We are happy to have her as part of our team.