Meet Our Team

Jennifer Arnold, M.D. Neonatology

Dr. Arnold, a neonatologist, serves as medical director for the Simulation Center at Johns Hopkins All Children’s Hospital. The center enables training in a realistic clinical environment on high-risk or emergency situations in such configurations as a trauma center, critical care unit, patient rooms and neonatal intensive care unit. Under Dr. Arnold’s leadership, Johns Hopkins All Children’s training is expanding beyond the clinical staff and graduate medical students to include instruction for parents on how they should care for premature babies when they take them home. Previously, Dr. Arnold led the Simulation Center at Texas Children’s Hospital in Houston. Dr. Arnold received her medical degree from the Johns Hopkins University School of Medicine in Baltimore, Maryland, and completed a residency, master of science in medical education, and neonatal-perinatal fellowship training at the Children’s Hospital of Pittsburgh and University of Pittsburgh Medical School. Dr. Arnold routinely speaks, does presentations and contributes to books and journals on simulation techniques and their benefits toward medical education.
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Mara DiBartolomeo, D.O. Neonatology

Dr. DiBartolomeo specializes in neonatology in the Johns Hopkins All Children’s Maternal, Fetal & Neonatal Institute. Dr. DiBartolomeo earned her medical degree from Nova Southeastern University in Fort Lauderdale, Florida. She trained in pediatrics and completed a neonatology fellowship at University of Chicago, Comer Children’s Hospital. While at the University of Chicago, Dr. DiBartolomeo concurrently completed a clinical medical ethics fellowship through the MacLean Center for Clinical Medical Ethics. During her training she completed a pediatrics and neonatology rotation at Amrita Institute in Kerala, India, and a neonatology elective at Kijabe Hospital in Kijabe, Kenya. Additionally, she holds a Master of Public Health from Nova Southeastern University and has completed internships in Washington, D.C., both on Capitol Hill and at a political think tank. Her clinical and research interests include clinical medical ethics, neonatal palliative care and ethical issues at the margins of viability.
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Mitzi Go, M.D. Neonatology

Dr. Go is a neonatologist in the Johns Hopkins All Children’s Maternal, Fetal & Neonatal Institute. She joined the hospital in 2016 and is the principal investigator in St. Petersburg for a multi-center National Institutes of Health-funded study on whether stress on expectant mothers contributes to childhood obesity. Her clinical interests focus on improving respiratory outcomes such as chronic lung diseases and associated conditions by using a multidisciplinary approach. 
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Prabhu Parimi, M.D. Neonatology

Dr. Parimi is director of the Johns Hopkins All Children's Maternal, Fetal & Neonatal Institute, director of the division of neonatology, and associate professor in the Johns Hopkins University School of Medicine. He is the author of numerous papers published in peer-reviewed journals and has presented peer-reviewed original science publications at national and international meetings. Dr. Parimi leads the cohort-based continuum of care model at Johns Hopkins All Children's Hospital, oversees clinical and translation investigative research, and provides leadership to a full-staff of neonatologists on the main campus and at affiliated community and regional hospitals.
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Katherine Apostolakis-Kyrus, M.D. Perinatology

Dr. Apostolakis-Kyrus specializes in maternal-fetal medicine in the Johns Hopkins All Children's Maternal, Fetal & Neonatal Institute. She earned her medical degree at Eastern Virginia Medical School and completed her Obstetrics and Gynecology Residency at Bayfront Health in St. Petersburg, Florida. She completed a fellowship in Maternal and Fetal Medicine at University of Tennessee Health Science Center.
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Mayra Cruz Ithier, M.D. Perinatology

Dr. Cruz Ithier is a maternal-fetal medicine specialist in the Johns Hopkins All Children’s Hospital Maternal, Fetal & Neonatal Institute. She joined the hospital staff in 2018. Dr. Cruz Ithier earned her medical degree from the University of Illinois in Chicago. She completed her obstetrics and gynecology residency at Bayfront Health in St. Petersburg where she served as education chief during her senior year. While at Bayfront she received the Research Award, Excellence in Obstetrics Award and the Resident Teacher Award.
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Francis Nuthalapaty, M.D. Perinatology

Dr. Nuthalapaty specializes in Maternal-Fetal Medicine in the Johns Hopkins All Children’s Hospital Maternal, Fetal & Neonatal Institute and sees patients at Brandon Regional Hospital. He joined the medical staff in 2018. Previously, he worked for 13 years as professor of obstetrics and gynecology at the University of South Carolina School of Medicine Greenville. He was also clinical educator in the Department of Obstetrics and Gynecology at the Greenville Health System in Greenville, South Carolina. Dr. Nuthalapaty earned his medical degree from Northwestern University Feinberg School of Medicine in Chicago, Illinois. He attended the Northwestern University Honors Program in Medical Education. He completed an obstetrics and gynecology residency at Penn State Milton S. Hershey Medical Center in Hershey, Pennsylvania, where he served as chief resident. Dr. Nuthalapaty also completed a fellowship in maternal-fetal medicine at the University of Alabama Birmingham in Birmingham, Alabama.
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Jose Prieto, M.D. Perinatology

Dr. Prieto is medical director of maternal-fetal medicine in the Johns Hopkins All Children’s Maternal, Fetal & Neonatal Institute. He specializes in the care of the mother and fetus in high-risk pregnancies.  Dr. Prieto is a graduate of the University of Miami School of Medicine, where he also received a Master's in Public Health. He completed his residency in obstetrics, gynecology and reproductive sciences at the University of Texas Health Science Center/Houston at L.B.J. General Hospital, where he was named Outstanding Chief Resident, followed by a fellowship in maternal fetal medicine at the University of Pittsburgh and Magee-Women's Hospital. He joined Maternal Fetal Medicine Associates in 1996. Dr. Prieto is the Clinical Practice Director for All Children's Perinatology Specialists. 
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Karen Raimer, M.D. Perinatology

Dr. Raimer is a key member of our maternal-fetal medicine team, providing care for many expectant mothers whose infants may require care in our NICU or CVICU as well as surgery after delivery. She joined All Children’s Perinatology Specialists in 1991 after completing her fellowship at University of Miami. Dr. Raimer is a graduate of the Louisiana State University School of Medicine, New Orleans. She completed a residency in obstetrics/gynecology at the Ochsner Foundation Hospital in New Orleans, where she served as chief resident. Following a fellowship in perinatology at the University of Miami, in 1991 Dr. Raimer joined Maternal Fetal Medicine Associates in St. Petersburg, FL and is the Regional Perinatal Intensive Care Center director for Maternal Fetal Medicine at Bayfront Medical Center. Dr. Raimer serves as an examiner for the American Board of Obstetrics & Gynecology.
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Andrea Ritchey, M.S.N., R.N., NE-BC, CCRN-K, CPST

Andrea Ritchey, M.S.N., R.N., NE-BC, CCRN-K, CPST Clinical Operations Manager

Andrea Ritchey is a clinical operations manager in the Johns Hopkins All Children’s Fetal Care Program. She joined the hospital staff in 2018. In her role, Ritchey provides guidance and leadership for program development and clinical oversight. Before becoming the clinical operations manager, she was a neonatal/fetal health program coordinator at Children’s Mercy Kansas City in Kansas City, Missouri, followed by a nursing education specialist in the neonatal intensive care unit at Johns Hopkins All Children’s Hospital. Ritchey received her Bachelor of Science in Nursing from Louise Herrington School of Nursing at Baylor University in Waco, Texas, followed by her Master of Science in Nursing Administration from the College of Nursing and Health Innovation at the University of Texas at Arlington in Arlington, Texas.


Betsy Vaught

Betsy Vaught Neonatal Development Care Specialist

Betsy Vaught is a neonatal development care specialist in the Fetal Care Program at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2012. In her role, Vaught takes families on a tour of the Johns Hopkins All Children’s neonatal intensive care unit (NICU), talks with them about what they may expect and answers any questions they might have. Once the baby is born and in the NICU, she provides parental education and support. Vaught received her Bachelor of Arts in anthropology from the University of Florida in Gainesville, followed by a Master of Arts in Early Childhood Education from the University of South Florida in Tampa. She is a certified newborn individualized developmental care and assessment program professional.