Our Team

Our team works closely with other leading experts throughout Texas Children’s Hospital to optimize care of patients with bleeding and clotting disorders. These collaborative efforts include advanced interventional technologies to treat complicated cases of thrombosis and life-threatening bleeding.

Director, Hemostasis and Thrombosis Program

Sarah E. Sartain, MD
Sarah E. Sartain, MD
Dr. Sarah Sartain is the director of the Hemostasis and Thrombosis Program at Texas Children’s Hospital. Her main focus lies in treating children with disorders of bleeding and clotting. She developed her interest in this field of hematology during her fellowship training at Texas Children’s… read more
Phone: 832-822-4362

Director, Hemophilia Treatment Center

Clay T. Cohen, MD
Clay T. Cohen, MD
Dr. Clay Cohen is a pediatric hematologist with clinical expertise in children and adolescents with bleeding and clotting disorders. Dr. Cohen is the Director of the Hemophilia Treatment Center at Texas Children’s Hospital where he provides care for patients with hemophilia, Von Willebrand disease… read more
Phone: 832-822-4242

Hematology/Oncology

Clay T. Cohen, MD
Clay T. Cohen, MD
Dr. Clay Cohen is a pediatric hematologist with clinical expertise in children and adolescents with bleeding and clotting disorders. Dr. Cohen is the Director of the Hemophilia Treatment Center at Texas Children’s Hospital where he provides care for patients with hemophilia, Von Willebrand disease… read more
Phone: 832-822-4242
YoungNa J. Lee-Kim, MD, MEd
Dr. YoungNa Lee-Kim is Director of the Fellowship Program in Pediatric Hematology-Oncology at Texas Children's Cancer and Hematology Center. She is a clinical member of the Hematology Center and the Hemostasis and Thrombosis team, and sees patients in the Hemophilia Treatment Center. Dr. Lee-Kim's… read more
Phone: 832-822-4362
Sarah E. Sartain, MD
Sarah E. Sartain, MD
Dr. Sarah Sartain is the director of the Hemostasis and Thrombosis Program at Texas Children’s Hospital. Her main focus lies in treating children with disorders of bleeding and clotting. She developed her interest in this field of hematology during her fellowship training at Texas Children’s… read more
Phone: 832-822-4362
Heather Soni, APRN, MSN, CPNP
Heather Soni, APRN, MSN, CPNP
Heather Soni is a pediatric nurse practitioner for the Hemophilia and Thrombosis Program at Texas Children’s Hematology Center. She specializes in the management of anticoagulation disorders. She is board certified by the Texas Board of Nursing and the Pediatric Nursing Certification Board.
Phone: 832-822-1541

Genetic Counselor

Hannah L. Helber, MS, CGC
Hannah Helber is a certified genetic counselor for the Hematology Center at Texas Children's Hospital. As a genetic counselor in the Hematology Clinic, she works to identify families at risk for inherited hematologic conditions. She provides education on genetics, as well as discussing options for… read more
Phone: 832-822-4240

Transfusion Medicine

Lisa Hensch, MD
Research Interests: Dr. Hensch is a member of the Division of Transfusion Medicine and Coagulation.  Her primary research interests include developing evidence-based strategies for safe transfusion in the pediatric patient population.  She is also actively involved in several research projects… read more
Phone: 832-824-5850
Amir Hassan Navaei, MD
Dr. Navaei is a board certified pediatric intensivist. He has a special interest in management of children requiring extra-corporeal life support technologies. He is also board certified in Transfusion Medicine and Coagulation and serves as a consultant for transfusion support and management of… read more
Phone: 832-824-5850
Jun Teruya, MD, DSc, FCAP
Dr. Teruya has extensive experience and expertise in patients with bleeding and thrombosis, pheresis procedures, and blood component therapy. He was an adult hematologist in Japan, and trained in Clinical Pathology and Transfusion Medicine/Coagulation at Massachusetts General Hospital, Harvard… read more
Phone: 832-824-5850

Gynecology

Jennifer L. Bercaw-Pratt, MD
Dr. Bercaw-Pratt will use her education and clinical experiences in this unique sub-specialty to provide high-quality, patient-centered care. She will treat her patients with the same time, dedication and commitment as she would expect for providers caring for her own family members. She desires to… read more
Phone: 832-822-2778
Jennifer E. Dietrich, MSc, MD, FACOG
It is important for me to place the patient at the center of everything that I do. I want to provide individualized care and treatment for each patient and family while providing the most up-to-date information regarding medications and technology advancements. My team of pediatric and adolescent… read more
Phone: 832-822-2778