Ms. Lessig has been a Nurse Practitioner in the Division of Endocrinology at the Children’s Hospital of Philadelphia since 2009.  Her areas of clinical expertise includes the care of children and adolescents with growth and puberty disorders, thyroid disorders, and 22q11.2 Deletion Syndrome.  Ms. Lessig works in collaboration with Dr. Calabria and Dr. Rossi to provide comprehensive team care to children and their families.  Ms. Lessig well known for her clinical expertise on both a local and national level, as an invited speaker and published author on these topics. 

Education and Training

Board Certification

Pediatric Nurse Practitioner - Board Certified (PNP-BC)

Graduate Degree

MSN - University of Pennsylvania, Philadelphia, PA
BSN - University of Virginia, Charlottesville, VA
BS in Biology - Mary Washington College, Fredericksburg, VA

Titles and Academic Titles

Nurse Practitioner

Departments and Services




Gannon A, Lessig M, Bauer AJ (2011). Papillary thyroid cancer in children and adolescents. In: Clinical Decision Support: Pediatrics. Decision Support in Medicine, LLC.

Lessig M, Gannon A, Bauer AJ (2011). Medullary Thyroid Carcinoma. In: Clinical Decision Support: Pediatrics. Decision Support in Medicine, LLC. 

Lessig, MK (2011).  Thyroid Cancer: Caring for the Pediatric Patient. Journal of Pediatric Nursing, 26, 388-391. 


Lessig, MK (2009).  The Role of 131I-MIBG in High Risk Neuroblastoma Treatment.  Journal of Pediatric Oncology Nursing, 26, 208-216.

Posters and Presentations


Rayannavar, A., Katz, L., Crowley, T., Grand, K., Lessig, M., Zackai, E., Emanuel, B., Lord, K, Bamba, V., McDonald-McGinn, D.  Association of Hypocalcemia with Congenital Heart Disease in 22q11.2 Deletion Syndrome, Poster Session at the Endocrine Society, Orlando, FL, April 2017.


Lessig, M., Central Precocious Puberty: To Treat or Not to Treat and Other Clinical Dilemmas, National Conference for the Pediatric Endocrine Nursing Society, Denver, CO, May 2016.


Lessig, M. (May 2015). 22q11.2 Deletion Syndrome: A Case Study. Poster session presented at the National Conference for the Pediatric Endocrine Nursing Society, Savannah, GA.  

Lessig, M. The 411 on Puberty and Puberty Medications in Pediatrics, The Children’s Hospital of Philadelphia, Monthly APN Presentation, Philadelphia, PA, September 2015.

Awards and Honors

2015, First Prize, Case Study Poster Award, Pediatric Endocrine Nursing Society

2008, First Prize, Research Poster, 24th Annual Pediatric Nursing Conference

2005, Inducted in the Sigma Theta Tau Honor Society at the University of Virginia