Our Team
Welcome to the Bay Haven family, we're so happy to meet you!







Dr. Peggy Martin
Pediatrician
Dr. Martin is a board-certified pediatrician with deep Maryland roots. Born and raised in Baltimore, she earned her undergraduate and medical degrees from the University of Maryland. She completed her pediatric residency at the University of Maryland Medical Center and has since cared for families across Maryland. Dr. Martin provides compassionate care, grounded in the latest research, and values partnering with parents to ensure every child reaches their fullest potential. Outside of the office, she enjoys cooking, reading, volunteering, playing pickleball, watching Ravens football, and spending time with her family, including golden retriever Bucky!
Dr. Shaylyn Proulx, PMHNP
Psychiatric Mental Health Nurse Practitioner
Dr. Proulx is a highly trained Nurse Practitioner who specializes in mental health care for children, teens, and young adults. As a Psychiatric Mental Health Nurse Practitioner (PMHNP), Dr. Proulx is the Nurse Practitioner equivalent of a psychiatrist. She is qualified to evaluate mental health concerns, make diagnoses, and prescribe medications to help support emotional and behavioral well-being. She takes a warm, thoughtful, and personalized approach to care. Dr. Proulx works closely with families to find the right treatment plan, and believes in combining medication with therapy, lifestyle support, and healthy habits. In her free time, she loves to cook, learn new things, and spend time with her own family, including her corgi Whiskey Maple Donut and cat Skrimp.
She’s excited to get to know your family!


Hannah Mules, CPNP, MSN
Certified Pediatric Nurse Practitioner
Hannah completed her Master's in Nursing-Pediatric Primary Care from Drexel University. She earned a Bachelor of Arts in Health Sciences from Gettysburg College, where she also played lacrosse. She then went on to earn her Bachelor of Science in Nursing from the University of Maryland. Hannah spent her eight-year nursing career in the Pediatric Progressive Care Unit (PPCU) and the Pediatric Emergency Room at the University of Maryland, as well as working in pediatric hematology and oncology while travel nursing in California. She grew up in the Ellicott City area and is an alumni of Mount De Sales Academy. She lives in Arnold with her husband, two children, and goldendoodle Hallie!
Samantha Jefferson, CPNP, DNP
Certified Pediatric Nurse Practitioner
Sammie completed her Doctorate of Nursing Practice in Pediatric Primary Care from the University of Maryland School of Nursing, where she also earned her Bachelor of Science in Nursing. Sammie spent her eight-year nursing career on the Pediatric Progressive Care Unit (PPCU) at the University of Maryland Children's Hospital. She grew up in Bowie and is an alumni of St. Pius X, as well as Archbishop Spalding High School, where she played soccer. She currently lives in Pasadena with her husband and goldendoodle, Lewnes aka Lewy.
She can't wait to meet your littles! ❤


Jessica Seen, CPNP, MSN
Certified Pediatric Nurse Practitioner
Jess is a board-certified Pediatric Nurse Practitioner. She received her Bachelor's Degree of Science in Nursing from Towson University and her Master's Degree of Science in Nursing from Drexel University. She brings 5 years of experience as a CPNP prior to joining Bay Haven. Jess spent her eight-year nursing career in the Neonatal Intensive Care Unit at the University of Maryland Medical Center in Baltimore. She also worked part-time in the NICU at Anne Arundel Medical Center. Jess grew up in Ocean City, Maryland. She currently lives in Davidsonville with her husband, daughter, and red lab Brody!
Medical Directors
And the rest of our Bay Haven family! ❤

Say hello to Dogtor Lewy!
You may catch him around the office at our fun events. Make sure to come pay the Dogtor a visit, he can't wait to meet you! ❤
play me while you scroll!

