Pediatric Thrombosis Program

Meet Our Team

The multidisciplinary thrombosis team is focused on treating infants, children and young adults who have developed blood clots.

Neil A. Goldenberg, MD PhD Hematology / Oncology

Dr. Goldenberg was named director of research at Johns Hopkins All Children's Hospital in July 2012 as well as chief research officer of the Johns Hopkins All Children's Research Institute and director of the new Clinical and Translational Research Organization at JHACH. He is an associate professor of pediatrics and medicine at the Johns Hopkins University School of Medicine.
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Marisol Betensky, MD Hematology / Oncology

Dr. Betensky specializes in hemostasis and thrombosis in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. She also treats bone marrow failure syndromes and congenital and acquired neutropenias, which are immune system conditions that may result in infections. She joined the hospital in 2016. Previously, she was an instructor in the Division of Hematology, Comprehensive Bone Marrow Failure Center at Children’s Hospital of Philadelphia.
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Katie Mills, D.N.P., A.P.R.N.Program Coordinator, Hemostasis and Thrombosis Programs


Irmel Ayala, MD Hematology / Oncology

Dr. Ayala is the director of the Hemophilia and Bleeding Disorders Treatment Center at Johns Hopkins All Children's Hospital. She also is the hematology leader of the Young Women Bleeding Disorders/Menorrhagia Clinic, which focuses on a multidisciplinary approach to bleeding symptoms in girls and young women. Dr. Ayala also is involved in the newly created Immune Dysregulation Clinic, which evaluates patients with autoimmune cytopenias in a multidisciplinary approach.
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Laurie Barrett, C.C.R.C., R.N.Clinical Research Nurse

Mark Bittles, MD Radiology

Dr. Bittles is an interventional radiologist at Johns Hopkins All Children’s Hospital. He joined the hospital staff in 2015. Dr. Bittles earned his medical degree at University of Tennessee College of Medicine and completed his radiology residency and an interventional radiology fellowship at University of Washington Medical Center. He completed a pediatric radiology fellowship at Vanderbilt University Medical Center.
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Mary Cardenas, R.N.Nurse Coordinator, Hemostasis and Thrombosis Program

Amanda Memken, B.C.P.P.S., Pharm.DPediatric Anticoagulation Clinical Pharmacist