Cancer & Blood Disorders Institute

Meet Our Hemophilia & Bleeding Disorders Team

Irmel Ayala, MD

Irmel Ayala, MD

Hematology / Oncology
Dr. Ayala is the division chief of Hematology and 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.
View Irmel Ayala’s Bio
Valerie Cruz Flores, MD

Valerie Cruz Flores, MD

Hematology / Oncology
Dr. Cruz Flores is a pediatric oncologist at Johns Hopkins All Children’s. She joined the hospital staff in 2020. She earned her medical degree from the University of Puerto Rico School of Medicine. She completed an internship and residency in pediatrics at the University of Puerto Rico School of Medicine, where she also served as chief resident. She completed a fellowship in pediatric hematology-oncology at Louisiana State University Health Sciences Center/Children’s Hospital New Orleans, followed by a fellowship in pediatric neuro-oncology at Johns Hopkins All Children’s.
View Valerie Cruz Flores’s Bio

Jasmine Reese, MD MPH

Jasmine Reese, MD MPH

Adolescent Medicine
Dr. Reese is the director of the Adolescent and Young Adult Specialty Clinic within the Division of General Pediatrics and Adolescent Medicine. She is also the adolescent medicine rotation director for the pediatric residency program. She joined the Johns Hopkins All Children's medical staff in 2016 and serves as a full-time assistant professor of pediatrics in the Johns Hopkins University School of Medicine. Dr. Reese’s clinical interests include reproductive health and mental health, and her research focuses are medical education and curriculum development in adolescent mental health and depression. She is an active member of the Society for Adolescent Health and Medicine, where she also serves as the secretary for the southeast United States region.
View Jasmine Reese’s Bio

Drew Warnick, MD

Drew Warnick, MD

Orthopaedics
Dr. Warnick is a pediatric orthopaedic surgeon at Johns Hopkins All Children’s Hospital. He sees patients in the St. Petersburg and Tampa locations of Children's Orthopaedic and Scoliosis Surgery Associates (COSSA), L.L.P., the Johns Hopkins All Children’s Outpatient Care location in Sarasota, and at IMG Academy where Johns Hopkins All Children’s provides sports medicine and general health services.
View Drew Warnick’s Bio

Dawn Harrison, APRN

Dawn Harrison, APRN


Mary Ann Cardenas, R.N.

Mary Ann Cardenas, R.N.


Lourdes Arvelo, LCSW

Lourdes Arvelo, LCSW


Lindsey L. Watson, PT, DPT, CSCS

Lindsey L. Watson, PT, DPT, CSCS


Kimberley Carson, PT, DPT, CSCS

Kimberley Carson, PT, DPT, CSCS


Kimberley Carson, PT, DPT, CSCS

Kimberley Carson, PT, DPT, CSCS