Kevin L. Schroeder, M.D.
Born in Columbus and raised in Findlay, Ohio, Kevin L. Schroeder MD received his bachelor’s degree from the University of Notre Dame and medical school degree from The Ohio State University College of Medicine. He completed his Internal Medicine Residency at Riverside Methodist Hospital and his Nephrology Fellowship at the University of Florida Shands Hospital in Gainesville, FL.
Dr. Schroeder served as the Program Director for the Transitional Year Residency Program at Riverside Methodist Hospital from 2005-2015. He served on the GMEC, MEC and MOT committees at Riverside during this time as well. He served as the Medical Director for Inpatient Dialysis at Riverside from 2004-2024, and the Chair of the OhioHealth Nephrology Clinical Guidance Council from 2016-2024. He currently serves as the Medical Director of Davita East and Davita Pickerington dialysis centers.
Dr. Schroeder has been a contributor to Conn’s Current Therapy, chapter on Acute Kidney Injury. He has been a co-investigator in the Simplicity III and Reduce Hypertension trials at the OhioHealth Advanced Hypertension Clinic; in addition, he served as co-investigator for the Reatta Falcon, Phoenix and Eagle trials. He is currently a co-investigator for the Astra-Zeneca BAX-DUO trial. Other areas of clinical interest include advanced hypertension management, electrolyte disorders, chronic kidney disease management and end stage renal failure.
Dr. Schroeder and his wife, Anita, are blessed with four wonderful children: Oliver, Ana, Audrey and Sophia. He treasures spending time with his family and is an active member of St. Agatha Parish.
Naveen Singri, M.D.
Dr. Singri graduated with a bachelor’s in economics from The Ohio State University in 1993 and received his medical degree from the University of Cincinnati. Dr. Singri joined Ohio Kidney Consultants in 2003.
Dr. Singri provides care in all areas of kidney disease with special interest in chronic kidney disease and prevention of end stage renal disease. He rounds at OhioHealth Grant Medical Center for inpatient consultations and sees outpatients at the Jasonway office and Grant satellite office. He is the past president of Ohio Kidney Consultants (2009-2015.) He is the medical director of Davita Downtown. He is the section of chair of Nephrology at Grant Medical Center and Pickerington Methodist Hospital.
Dr. Singri lives in Dublin with his 4 children. Outside of the hospital, he enjoys playing pickleball and coaching his children’s sporting teams and rooting on the Buckeyes.
Elizabeth M. Rave, M.D.
Dr. Rave was born in Akron, Ohio. She completed her undergraduate degree in chemical engineering at the University of Toledo. After working for Goodyear for three years, she realized that medicine was her true calling. Dr. Rave attended medical school at the University of Toledo Medical School (formerly Medical College of Ohio, MCO) and went on to complete both her residency and nephrology fellowship training at The Ohio State University.
Dr. Rave has been with Ohio Kidney Consultants since 2005 and is currently serving as President. She specializes in patients with chronic kidney disease, electrolytes, hypertension, and dialysis. She splits her clinical time seeing patients in the outpatient setting (either in the office or in dialysis centers throughout Columbus and the surrounding areas) and seeing acutely ill patients at the hospital. In addition to clinical responsibilities, she is heavily involved with patient care improvement though several hospital committees, including the OhioHealth Clinical Guidance Council, Peer Review, and Credentialing.
Dr. Rave is married and has one son. In her free time, she enjoys traveling, tennis, and fitness.
Daniel J. Roncone, D.O.
Born and raised in Youngstown, Ohio, Dr. Roncone received his bachelor’s degree in biological sciences at The University of Cincinnati and his medical degree at The Ohio University Heritage College for Osteopathic Medicine. He completed his internship at Doctor’s Hospital in Columbus, Ohio and his residency in Internal Medicine at Riverside Methodist Hospital. Dr. Roncone completed his fellowship in nephrology at The Ohio State University.
He joined Ohio Kidney Consultants in 2007. Dr. Roncone specializes in all areas of kidney disease with special interest in chronic kidney disease, electrolyte disturbances, hypertension and dialysis. He rounds at Riverside Methodist, Dublin Methodist and Doctors hospitals for inpatient consultations. His outpatient offices include our main Jasonway location as well as other sites on Georgesville road and in Grove City. He is the medical director of Davita Grove City and Davita West dialysis centers. He enjoys teaching medical students and residents throughout Ohio Health.
Dr. Roncone is married with 4 children and in his spare time enjoys biking and playing golf.
Jerry W. Chellini, D.O.
Dr. Chellini was born and raised in Cincinnati, Ohio. He received his bachelor’s degree from the University of Cincinnati, and his medical degree from the Ohio University College of Osteopathic Medicine in Athens, Ohio. He completed his internship and residency at Doctor’s Hospital and his nephrology fellowship at The Ohio State University, both in Columbus, Ohio.
Dr Chellini joined Ohio Kidney Consultants in 2008 and currently serves as the Medical Director for the DaVita Dialysis Dublin unit. Dr. Chellini received additional specialized training in interventional nephrology. He performs these procedures at the Vascular Access Center of Central Ohio, where he also serves as the medical director.
In his spare time, Dr. Chellini enjoys spending time with his family
Tameem Kaka, M.D.
Dr. Tameem Kaka is a nephrologist in the Greater Columbus area and Delaware County, Ohio and has been in practice for several years. Dr. Kaka treats conditions affecting the kidneys such as renal failure, hypertension and chronic kidney disease. He serves as the Medical Director at US Renal Care – Delaware and DaVita Marion. He is board certified by American Board of specialties in Nephrology.
Dr. Kaka and his wife, Sejal have 2 kids and in his free time he enjoys camping, hiking, golf and tennis.
Ramesh Annadurai, M.D.
Dr. Annadurai was born in Chillicothe, Ohio but has lived in Columbus, Ohio most of his life. He completed his undergraduate degree in psychology at The Ohio State University and graduated Summa Cum Laude. Dr. Annadurai attended medical school at The Ohio State University as well. He continued on to complete his Internal Medicine residency at Riverside Methodist Hospital, followed by his nephrology fellowship at The Ohio State University.
Dr. Annadurai joined Ohio Kidney Consultants in July 2014 where specializes in treating patients with chronic kidney disease and end stage renal failure, requiring dialysis. In his spare time, he enjoys fitness, listening to music and spending time with his family.
Ruba Nijmeh, M.D.
Dr. Nijmeh was born in Amman, Jordan. She completed medical school at The University of Jordan in 1997. She went on the complete her internship and residency at The University of Jordan in 2002, where she continued as an instructor at the medical school.
She then completed her internal medicine residency at Jordan university hospital, where she passed the Jordanian internal medicine board and the Arabic internal medicine boards. She then worked as a hospitalist at Arab medical center in Amman Jordan.
Dr. Nijmeh completed her Internal Medicine residency at NEOUCOM (Northeast Ohio Medical University College of Medicine) in 2008, after she moved to the USA. She then completed her fellowship in Nephrology at The Ohio State University in 2010.
Dr. Nijmeh is board certified for the American and Jordanian board of nephrology. She has worked in the private practice setting for over 12 years where she treats patients with hypertension, chronic kidney disease, polycyclic kidney disease, recurrent kidney stone formers, patients with electrolyte abnormalities, as well as end stage renal disease. Including in center hemodialysis and peritoneal hemodialysis and post-transplant patients.
Dr. Nijmeh joined Ohio Kidney Consultants in July 2015. She sees and treats patients at different hospitals in Central Ohio in addition to office patients and oversees dialysis patients at our Davita East, Davita Parkside, Davita Canal Winchester and Davita Taylor Park locations. She is also the medical director of DaVita Parkside and DaVita Canal Winchester. She is currently on the medical board for the National Kidney Foundation Central Ohio chapter.
Christopher Valentine, M.D.
Born and raised in Toledo, Ohio, Dr. Valentine received his bachelor’s degree from Hillsdale College in Hillsdale, Michigan and medical degree from Case Western Reserve University. He completed his Internal Medicine residency at William Beaumont Hospital in Royal Oak, Michigan and his Nephrology Fellowship at The Ohio State University Medical Center in Columbus, Ohio.
Dr. Valentine worked in a private nephrology practice for two years prior to joining The Ohio State University where he worked for 11 years as a clinical Nephrologist and educator. He was the Training Program Director of the Nephrology Fellowship at OSU for 5 years.
Dr. Valentine has several awards including Best Doctors In America each year from 2012 – 2017 as well as being awarded fellowship in the American College of Physicians in 2011. He is board certified by the American Board of Internal Medicine in nephrology and internal medicine. He is also an American Society of Hypertension certified specialist in clinical hypertension.
Robin Shah, D.O. M.B.A.
Dr. Shah was born and raised in New Jersey. He received his bachelor’s degree from the University of North Carolina at Chapel Hill and his medical degree from Kansas City University. Dr. Shah also obtained his Master of Business Administration in Healthcare Leadership from Rockhurst University Helzberg School of Management.
Dr. Shah moved to Ohio after meeting his wife. He completed his Internal Medicine training at The Christ Hospital in Cincinnati and nephrology fellowship at The Ohio State University Wexner Medical Center, where he also received training to practice as an interventional nephrologist. He served on faculty at OSU for two years before joining Ohio Kidney Consultants in 2019. He also performs dialysis access related procedures as an interventional nephrologist at the Vascular Access Center of Central Ohio (VACCO).
Dr. Shah is board certified in Internal Medicine and Nephrology.
Dr. Shah and his wife have become very fond of Ohio and have settled in Powell. They have two beautiful children. In his free time, he loves to spend time with his family. He also enjoys traveling, recreational and outdoor activities, exercising, music, and reading.
Karim T. Attia, M.D.
Dr. Attia was born in Egypt and moved to Columbus with his family in 1997 at age 14. He graduated from the Ohio State University in 2005 with a Bachelor of Science in Medical Technology. He worked as a clinical laboratory scientist at Case Western University Medical Center and at the Ohio State University Wexner Medical Center for 3 years. He then attended Ross University School of Medicine and earned his M.D. in 2013. He completed his Internal Medicine residency training at Mount Carmel West Hospital in 2016. He worked as a hospitalist for four years in Columbus then went on to complete a fellowship in Nephrology at the Ohio State University in 2022.
He has been with Ohio Kidney Consultants since 2022. He specializes in all areas of kidney disease with a special interest in thrombotic microangiopathies and other hematologic disorders that affect the kidneys.
Dr. Attia is happily married and in his spare time, he enjoys running, biking, traveling, and spending time with his family in Columbus.
Saurabh S. Dasgupta, M.D.
Dr. Dasgupta was born in New Delhi, India. He studied abroad for both high school and undergraduate school in Singapore and at Emory University, respectively. He received his medical degree from Kasturba Medical College in Manipal, India. He completed his residency in Internal Medicine and Pediatrics at the University of Oklahoma. He first set foot in Ohio for his Nephrology fellowship at the Cleveland Clinic. After fellowship, he worked in the greater Washington, DC area as an Internist and Nephrologist for 7 years. He relocated to Columbus, OH with his family in 2022 and has been a practicing Nephrologist with Ohio Kidney Consultants since that time. He is fluent in three languages: English, Hindi, and Bengali. His areas of interest within nephrology include hypertension and electrolyte disturbances. With his background in pediatrics, he is adept at treating patients who are transitioning from pediatric to adult renal care.
Dr. Dasgupta’s wife (the other Dr. Dasgupta) is a renal and breast pathologist at the Ohio State University. They reside with their daughter and dog in Dublin, OH. Dr. Dasgupta enjoys trying new restaurants, exploring Columbus, and incorporating history into his travels.
Patrick D. Schaffer, D.O.
Dr. Schaffer was born and raised in New Jersey. He received his bachelor’s degree in biology from The Ohio State University and his medical degree from Rowan University School of Osteopathic Medicine in Stratford, NJ. He completed his residency in Internal Medicine at Doctors Hospital in Columbus, OH and he returned to The Ohio State University for his fellowship in Nephrology.
He joined Ohio Kidney Consultants in 2024. His areas of interest include home dialysis therapies and the management and prevention of kidney stones. He divides his time between inpatient, outpatient, and dialysis settings.
Dr. Schaffer lives in Westerville, Ohio with his wife and son. He enjoys exploring Columbus-area restaurants and metroparks with his family and friends and is an avid Ohio State sports fan. On Saturdays in Fall when he is not working, he can be found at Ohio Stadium, cheering on the Buckeyes.
Erika D. Critell, D.O.
Dr. Critell was born and raised in Cleveland, Ohio. She completed her undergraduate degree in neuroscience and chemistry at the University of Mount Union and went on to attend medical school at Ohio University Heritage College of Osteopathic Medicine. She completed internal medicine residency training at Riverside Methodist Hospital, followed by clinical nephrology fellowship at the Ohio State University.
Dr. Critell joined Ohio Kidney Consultants in 2024. She has an interest in multiple aspects of nephrology care including hypertension, kidney stones, dialysis, critical care, and electrolyte abnormalities. She enjoys teaching medical students and residents and values comprehensive and compassionate care for her patients.
In her spare time, Dr. Critell enjoys soccer, yoga, celebrating her Slovenian heritage, and spending time with her husband and 2 daughters.
Constance Nicastro-Bowman, C.N.P.
Constance Nicastro-Bowman joined Ohio Kidney Consultants in 2013. She graduated from The Ohio State University with a Bachelors in Nursing in 1998 and from Otterbein University with a Masters in Nursing in 2008. She practiced as a Nurse Practitioner in Cardiology at Riverside Methodist Hospital prior to her transition to Nephrology.
Connie is a member of the Ohio Association of Advanced Practice Nurses and the American Nephrology Nurses Association.
She provides care to both ESRD patients on hemodialysis at various Davita Dialysis centers in Central Ohio. In addition, she follows outpatients with chronic kidney disease at the Jasonway office location.
Connie and her husband reside in Dublin, Ohio with their 3 children, Bella, Emma and Nicolas. In her free time she enjoys running, social time with friends and spending time with her family.
William Metz, C.N.P.
Born and raised in Marion, Ohio, William received his Associates Degree in Nursing in 2000 from Marion Technical College. He was a 25-year Ohio Health employee who worked at Riverside Methodist Hospital Vascular Thoracic Surgery floor for 17 years. He received his Bachelor’s Degree in Nursing in 2013 from Capital University and Master’s Degree in Nursing in 2017 from Otterbein University.
Starting with Ohio Kidney Consultants in July 2017, William enjoys working with dialysis patients at multiple clinics in the Central Ohio area.
William is a member of the Ohio Association of Advance Practice Nurses and the National Kidney Foundation.
William and his wife, Cheryl, reside in Columbus. In his free time, William enjoys many different sports (soccer, baseball and football) and plays soccer when time allows.
Jennifer Bando, C.N.P.
Jennifer Bando joined Ohio Kidney Consultants in early 2023. She was born and raised in Perrysville, Ohio. She attended The MedCentral College of Nursing where she obtained a Bachelors in Nursing in 2004. She then moved and worked within Columbus, Ohio in critical care and open-heart recovery throughout the OhioHealth systems. Once she completed her MSN-FNP at Chamberlain College of Nursing in 2016 she then practiced for 6 years with her NP in internal medicine with HMS. Since then, transitioning to nephrology.
Jennifer is a member of the Ohio Association of Advanced Practice Nurses.
She provides care to both ESRD patients on hemodialysis at various Davita Dialysis centers in Central Ohio and USRC in Deleware.
Jennifer and her husband reside in Plain City, Ohio with their 2 children, Olivia and Natalia. Along with many animals on their farm. In her free time, she enjoys working on the farm and gardening. She also loves reading on her kindle.
Katherine Brown, C.N.P.
Katherine Brown was born and raised in Marion, Ohio. Katherine graduated from the University of Dayton in 2017. Katherine then continued her education at Mount Carmel College of Nursing, where she earned a bachelor’s in nursing. She worked as a critical care nurse at OhioHealth Doctors West Hospital and Grant Medical Center. She joined Ohio Kidney consultants after graduating from Mount Carmel College of Nursing with her Masters in Nursing in 2023.
Katherine is a member of The Ohio Association of Advanced Practice Nurses and the National Kidney Foundation.
Katherine enjoys caring for dialysis patients at various inpatient and outpatient locations throughout the Columbus area.
Katherine resides in Columbus, Ohio. In her free time, Katherine enjoys participating in multiple intramural sports, especially volleyball, and spending time with her family.
Susie Winters, C.N.P.
Susie Winters was born and raised in Lancaster, Ohio. She has worked at Riverside Methodist Hospital since 2006 until she started as an ICU nurse in 2010 when she graduated from COTC with an Associate of Applied Science Degree in Nursing Technology. She graduated from Ohio University with a Bachelor of Science in Nursing in 2016, then graduated from Mount Carmel College of Nursing with a Master of Science in Nursing – AGACNP in 2021. She began practice as a hospitalist at Riverside Methodist Hospital until joining Ohio Kidney Consultants in 2023.
Susie is a member of the Ohio Association of Advanced Practice Nurses and American Association of Critical Care Nurses. She provides care to ESRD patients on hemodialysis for inpatients at Riverside Methodist Hospital and Grant Medical Center as well as at various Davita Dialysis centers throughout Central Ohio.
Susie and her family reside in Marysville, Ohio with her dog. In her free time, she enjoys new adventures while traveling, exploring caves, discovering new restaurants, crafting, and listening to audiobooks.
