Neonatologists are pediatricians with special expertise in caring for sick or premature infants. Our neonatologists are world leaders in caring for babies requiring intensive care after birth. Babies who undergo fetal surgery are cared for in a special surgical unit in the Intensive Care Nursery.

For further information regarding neonatology please refer to the UCSF Neonatology website.

Yao Sun, M.D., Ph.D.

Professor, Pediatrics
Chief, Division of Neonatology

Dr. Yao Sun is medical director of the William H. Tooley Intensive Care Nursery at UCSF Children's Hospital. He uses his expertise in medical informatics, a field at the juncture of medicine and computer science, to keep the intensive care nursery on the cutting edge of patient diagnoses and treatments.

Sun is an associate professor of clinical pediatrics in the UCSF Division of...

Luke Judge, M.D., Ph.D.

Assistant Professor, Pediatrics

Dr. Judge completed his MD and PhD at University of Washington School of Medicine in Seattle, WA as a part of the Medical Scientist Training Program.  His graduate work was performed through the interdisciplinary Molecular and Cellular Biology program in the laboratory of Dr. Jeffrey Chamberlain, where he focused on dystrophin protein function and therapeutic gene replacement for Duchenne...

Roberta L. Keller, M.D.

Professor, Pediatrics
Medical Director, Neonatal ECMO Program

Dr. Keller received her medical degree from the University of California San Francisco, where she also undertook her postgraduate training, completing a residency in Pediatrics and a fellowship in Neonatal-Perinatal Medicine at the UCSF Medical Center/UCSF Children’s Hospital. During her fellowship, she was the recipient of the Glaser Pediatric Research Network fellowship. She is the director...

Mark Petersen, M.D.

Assistant Professor, Pediatrics

Dr. Mark Petersen is a neonatologist at UCSF. He received his medical degree from the University of Iowa. Petersen completed his residency training in pediatrics at Lucile Packard Children’s Hospital at Stanford where he subsequently served as chief resident and clinical instructor.

Elizabeth Rogers, M.D.

Associate Professor, Pediatrics

Elizabeth Rogers completed her undergraduate degree in Slavic Languages and Literature and History of Science at Harvard University in 1998.  She then received her medical degree from Stanford University in 2003 and completed residency training in pediatrics at University of California San Francisco.  Her major interests are in the neurodevelopmental follow up of premature and critically ill...

Thomas K. Shimotake, M.D.

Professor, Pediatrics
Associate Director of Clinical Programs in Neonatology
Co-Director, Neuro-Intensive Care Nursery
Fellowship Director, Neonatal-Perinatal Medicine

Dr. Thomas Shimotake currently serves as Associate Director of Clinical Programs in Neonatology at UCSF. Dr. Shimotake earned his medical degree from the University of Illinois at Chicago in 1997. He had previously completed a two-year research assistantship at the National Institute of Mental Health, in the Division of Neuroscience, studying the pharmacokinetics of neuroleptic agents. He then...

Janet Shimotake, M.D.

Assistant Professor, Pediatrics

Dr. Janet Shimotake is a neonatologist who cares for pregnant patients and babies with a high chance for complications during birth. She attends high-risk deliveries to resuscitate and stabilize babies, and cares for premature infants, as well as those born with surgical issues, respiratory failure, or neonatal encephalopathy and seizures.

After the highest-risk babies graduate from the...