Johns Hopkins All Children's Hospital

Meet Our Diabetes Team

We provide care for infants, children and teens with a wide variety of pediatric endocrinological problems.

Diabetes Providers

Jose Canas, MD

Jose Canas, MD

Endocrinology
Dr. Canas is a pediatric endocrinologist at Johns Hopkins All Children’s Hospital. He joined the hospital staff in 2018. He was previously associate attending at Wolfson Children's Hospital, and served as medical director of the Nemours Pediatric Cardio Metabolic and Bariatric Center in Jacksonville, Florida. His research interests include cardiovascular complications of diabetes and the use of carotenoids for obesity prevention. Dr. Canas earned his medical degree from Universidad Nacional Pedro Henriquez Urena in the Dominican Republic. He completed his pediatrics residency and served as chief resident at Nassau County Medical Center. There he also completed a clinical and research fellowship in pediatric endocrinology and metabolism.
View Jose Canas’s Bio
Suzanne Jackman, MD

Suzanne Jackman, MD

Endocrinology
Dr. Jackman specializes in pediatric endocrinology. She received her medical degree from the University of South Florida College of Medicine, where she received the Lewis A. Barness Award from the Department of Pediatrics and the Watson Clinic Foundation Award for Medical Research. She remained at USF for her pediatric residency, earning the Intern of the Year Award, followed by a fellowship in pediatric endocrinology.
View Suzanne Jackman’s Bio
Allen Root, MD

Allen Root, MD

Endocrinology
Dr. Root is a pediatric endocrinologist. A graduate of Harvard Medical School, Dr. Root completed his internship at Strong Memorial Hospital, Rochester, NY and his pediatric residency at University of Pennsylvania, followed by a fellowship in pediatric endocrinology at Children's Hospital of Philadelphia, University of Pennsylvania. After serving on the medical faculty of the University of Pennsylvania and Temple University, Dr. Root joined the University of South Florida College of Medicine in 1973, serving as professor of pediatrics, associate and vice-chair of the Department of Pediatrics, and director of the pediatric residency program.
View Allen Root’s Bio
Shuchi Shah, MD

Shuchi Shah, MD

Endocrinology
Dr. Shah specializes in pediatric endocrinology for Johns Hopkins All Children’s Hospital. She sees patients at Johns Hopkins All Children’s Outpatient Care, Tampa, and Johns Hopkins All Children’s Outpatient Care, East Lake. She joined the hospital staff in 2018. Dr. Shah earned her medical degree from Wake Forest University School of Medicine in Winston-Salem, North Carolina. She completed a pediatric residency and pediatric endocrinology fellowship at Children’s Medical Center/University of Texas Southwestern Medical Center in Dallas, Texas.
View Shuchi Shah’s Bio
Walter Zegarra, MD

Walter Zegarra, MD

Endocrinology
Dr. Zegarra specializes in pediatric endocrinology at Johns Hopkins All Children’s Hospital. He joined the hospital staff in 2021. He sees patients on our main campus in St. Petersburg, Florida, and at our Outpatient Care location in Tampa. Dr. Zegarra earned his medical degree from the University of Miami Miller School of Medicine in Miami. He completed a pediatric residency from Jackson Memorial Hospital-University of Miami, followed by a fellowship in endocrinology from Stanford Health Care-Stanford University in Stanford, California.
View Walter Zegarra’s Bio

Colleen Chambers, APRN

Colleen Chambers, APRN

Allied Health
Colleen Chambers, MSN, APRN, CPNP-PC, is a nurse practitioner in the endocrinology and diabetes program at Johns Hopkins All Children’s. She joined the hospital staff in 2022. Colleen has worked as a registered nurse several children’s hospitals including Cleveland Clinic Children’s, UH Rainbow Babies and Children’s Hospital, and UPMC Children’s Hospital of Pittsburgh. She has also worked as a registered nurse and camp counselor at Camp Ho Mita Koda in Newbury, Ohio, the oldest camp serving children with diabetes. Colleen has also worked with Beyond Type 1 on their DKA Warning Signs Awareness Campaign since 2019. She earned her Master of Science in Nursing from Kent State University in Kent, Ohio. She is currently enrolled in the Doctorate of Nursing Practice program at University of Pittsburgh.
View Colleen Chambers’s Bio
Kevin Lewis, DNP

Kevin Lewis, DNP

Allied Health
Kevin Lewis, DNP, APRN, PPCNP-BC, CDE, is a pediatric nurse practitioner specializing in endocrinology at Johns Hopkins All Children’s Hospital. Previously, he was at the Charleston Area Medical Center in Charleston, West Virginia, where he most recently was director of clinical diabetes. He also has experience at the Akron Children's Hospital in Ohio, the University of Maryland Medical Center in Baltimore, the Walter Reed Army Medical Center in Washington and Shady Grove Adventist Hospital in Rockville, Maryland. He received his Master of Nursing/Child Health and his Doctor of Nursing Practice from West Virginia University. Dr. Lewis is a certified diabetes educator.
View Kevin Lewis’s Bio
Bimota Nambam, MBBS

Bimota Nambam, MBBS

Endocrinology
Dr. Nambam specializes in pediatric endocrinology at Johns Hopkins All Children’s Hospital and serves as an assistant professor in the Johns Hopkins University School of Medicine on the St. Petersburg, Florida, campus. She joined the medical staff in 2020. Before joining Johns Hopkins All Children’s, Dr. Nambam was an assistant professor of pediatric endocrinology at Children’s Hospital of Richmond at Virginia Commonwealth University. She was also an assistant professor of pediatric endocrinology at Louisiana State University Health in Shreveport. Her clinical interests include type 1 diabetes, bone metabolism and health, neonatal hypoglycemia, and childhood hypoglycemia.
View Bimota Nambam’s Bio
Shelley Nicholls, APRN DNP

Shelley Nicholls, APRN DNP

Allied Health
Shelley Nicholls, DNP, APRN, CDCES, is a nurse practitioner in the endocrinology and diabetes program at Johns Hopkins All Children’s. She joined the hospital staff in 2022. She was previously a nurse practitioner at Broward Health Medical Center in Fort Lauderdale, Florida, and a nurse practitioner and director of patient education at University of Miami Diabetes Research Institute. She earned her Doctorate of Nursing Practice from Florida International University in Miami.
View Shelley Nicholls’s Bio
Amanda Spicochi, APRN

Amanda Spicochi, APRN

Allied Health
View Amanda Spicochi’s Bio
Rebeka Tramble, APRN

Rebeka Tramble, APRN

Rebeka Tramble, MSN, APRN, PPCNP-BC, CPN, is a pediatric nurse practitioner in endocrinology at Johns Hopkins All Children’s Hospital. She joined the hospital staff in 2021. She previously worked in pediatric primary care and was also a pediatric critical care registered nurse at St. Joseph’s Children’s Hospital in Tampa. She earned a Bachelor of Science in health promotion from the University of Georgia, a Bachelor of Science in nursing from Mercer University in Atlanta, and a Master of Science in nursing from the University of South Florida.
View Rebeka Tramble’s Bio

Certified Diabetes Educators 

Stacey Cayler

Stacey Cayler

BA, RN-BC, CDE
Stacey Cayler is a certified diabetes educator in the Johns Hopkins All Children’s Endocrinology and Diabetes program. She joined the hospital staff in 2020. Before joining the hospital, she was a certified diabetes educator for both inpatient and outpatient at Moffitt Cancer Center in Tampa. She earned her diploma of nursing from Mercy Hospital School of Nursing, and her Bachelor of Arts in sociology from Simpson College.

Kaitlin Dorman

Kaitlin Dorman

MS, RD, LD/N
Kaitlin Dorman is a registered dietitian nutritionist who joined the endocrinology team at Johns Hopkins All Children’s Hospital in 2017. She was previously at UF Health in Gainesville, where she also completed her internship. She earned her Master of Science degree in nutrition from the University of Florida in Gainesville.

Abigail Jessup

Abigail Jessup

RN
Abigail Jessup is a certified diabetes educator in the Johns Hopkins All Children’s Endocrinology and Diabetes program. She joined the hospital staff in 2019 as an ambulatory registered nurse. Before joining the hospital, she was a nurse in pediatric endocrinology and gastroenterology at Children’s Healthcare of Atlanta at Scottish Rite. Jessup earned her Bachelor of Science in nursing from Kennesaw State University WellStar School of Nursing, and her Bachelor of Science in biology from Erskine College.

Kathleen D. Peralta

Kathleen D. Peralta

RDN, CDCES, LD
Kathleen D. Peralta, RDN, CDCES, LD, is a Certified Diabetes Care and Education Specialist in the Diabetes Program at Johns Hopkins All Children’s. She joined the hospital staff in 2022. She was previously a Diabetes Educator and Bariatric Dietitian at St. Anthony’s Hospital Life Help Center in St. Petersburg, Florida, and a Diabetes Educator and clinical research Dietitian at New West Physicians in Golden, Colorado. She earned her Bachelor of Science in Nutrition from University of Vermont in Burlington, and completed a post graduate dietetic internship at Lutheran General Hospital in Park Ridge, Illinois.

Jim Shapter

Jim Shapter

RDN, LDN
Jim Shapter is a registered dietitian in the Johns Hopkins All Children’s Endocrinology program. He joined the hospital staff in 2019. In his role, Shapter works with children and families to help educate and guide them through endocrine and diabetes disorders. Before joining Johns Hopkins All Children’s, Shapter was a registered dietitian at The Ranch in Nunnelly, Tennessee, followed by counseling a diverse population in private practice at Allison Nutrition Counseling in Nashville, Tennessee. Shapter received his Bachelor of Science in Nutrition and Food Science with a concentration in Dietetics from Middle Tennessee State University in Murfreesboro, Tennessee. He completed his dietetic internship at Vanderbilt University Medical Center in Nashville, Tennessee.

Cate White

Cate White

RN, CDE, CPT
Cate White is a certified diabetes educator in the Johns Hopkins All Children’s Endocrinology and Diabetes program. She joined the hospital staff in 2021. Before joining the hospital, she was a certified diabetes educator at St. Joseph’s Children’s Hospital in Tampa. She earned her diploma of nursing from Massachusetts General Hospital School of Nursing in Boston, Massachusetts.
 

Diabetes Support Services

Merlin Lluberes

Merlin Lluberes

MSW
Merlin Lluberes is a social worker in the Diabetes Program at Johns Hopkins All Children’s. He assists patients and families in identifying psychosocial needs and refers patients to community resources that can provide support. He joined the hospital staff in 2021. Lluberes brings more than six years of social services experience and more than three years of experience as a probation and parole officer to his role in supporting patients and families. He earned a bachelor’s degree in interdisciplinary studies with concentrations in sociology, Spanish and biology from East Stroudsburg University, and a Master of Social Work from Marywood University. He speaks Spanish.