Pediatrician Staff

All professionals at Bel Air Pediatric Center & Havre de Grace Pediatric Center maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.



Robert Yim, MD

Robert Yim, MD

Dr. Robert Yim is board certified in pediatrics and pediatric pulmonology.  He was born in Havre de Grace and returned to Harford County to practice pediatrics with his father in 2010.  After graduating from the John Carroll School, Dr. Yim received his Bachelor of Science in chemistry with honors from Haverford College.  He received his M.D. from the University of Pittsburgh School of Medicine and then completed his training in pediatrics and pediatric pulmonology at Children’s National Medical Center in Washington DC.  Dr. Yim enjoys treating the generations of patients who grew up seeing his father for their pediatric care.

Kristen Deitchman, DO

Kristen Deitchman, DO

Dr. Kristen Deitchman is board certified in pediatric medicine. She is a native of Maryland and grew up on the Eastern Shore in St. Michaels. Dr. Deitchman earned her bachelor of arts at the University of Delaware, and her medical degree at Philadelphia College of Osteopathic Medicine. She completed her medical training at St. Christopher's Hospital for Children in Philadelphia. Dr. Deitchman has prior experience in both pediatric hospital medicine as well as pediatric primary care. She has a professional interest in breastfeeding and promoting healthy lifestyles. She is proficient in Spanish.  When not at work, Dr. Deitchman is busy being a mom of three, and enjoys hiking and being outdoors with her family. She can be spotted in the summer frequenting the ice cream shops and creameries in Harford County. 

John Druyor, FNP

John Druyor, FNP-C

John Druyor is board certified by the American Association of Nurse Practitioners.  He graduated from Weber University in Ogden, Utah in 2001 with an Associates of Applied Science in Nursing.  He then attended University of Maryland, receiving his Bachelor of Science in Nursing in 2008.  After several years in the nursing field, he earned a Master of Science in Nursing as a Family Nurse Practitioner from Simmons College in Boston. As part of his training, he completed two clinical rotations at Bel Air Pediatrics with Dr. Robert Yim.On a personal note, John was formerly a patient of the practice. He has two children, who were both patients of this practice as was their mother.  Many of John’s extended family are also patients of the practice. In particular, his nephew is very excited to have his Uncle take care of him!


Sandra L Hoerr DNP, CPNP-PC

Sandra L Hoerr DNP, CPNP-PC, IBCLC

Sandra Hoerr is board certified by the Pediatric Nursing Certification Board as a Primary Care Pediatric Nurse Practitioner. She graduated from The University of Rhode Island in 2002 with a Bachelor’s of Science in Nursing. Sandra then served 6 years as a US Naval Nurse Corps Officer, specializing in Obstetrics and Pediatrics. After her time in the Navy, Sandra spent 7 years with The Johns Hopkins Hospital Perinatal Nursing team. In 2013 Sandra graduated from Towson University with a Master’s of Science in Nursing, Education. After several years of Perinatal and Neonatal, Nursing Education Sandra returned to school and earned her Doctorate of Nursing Practice as a Pediatric Nurse Practitioner with a focus on Pediatric Primary Care, from the University of Maryland. As part of her Doctoral studies, Sandra competed for rotations in primary, urgent and specialty pediatric clinics. She completed her certification as an internationally board certified lactation consultant in 2021.  She offers lactation services in both our Bel Air and Havre de Grace offices. Sandra lives in Bel Air with her husband and two children. She enjoys traveling, swimming and every moment with her family.


Stephanie Skrobiszewski, FNP-C

Stephanie Skrobiszewski, FNP-C

Stephanie Skrobiszewski is board certified by the American Academy of Nurse Practitioners. She received her Bachelor's of Science in Nursing at Wilkes University in Pennsylvania in 2015. She practiced as a registered nurse at Johns Hopkins Hospital for 5 years. She then received her Masters of Science in Nursing as a Family Nurse Practitioner from Drexel University in Pennsylvania. As part of her training she completed a clinical rotation at Bel Air Pediatrics with Sandra Hoerr, NP.  In her free time she enjoys spending time with her family, traveling, and baking.


Contact Us

If you have any questions or would like to schedule an appointment, please contact us at 410-838-9555 (Bel Air) or 410-939-0696 (Havre de Grace).