Providers and Staff

Doctors and Staff of TAPAC standing outside next to a wood wall

Meet our friendly, experienced pediatricians and staff at TAPAC! Our entire team is dedicated to helping you and your child feel at home from the moment you walk through the door. We’re proud to be members of the Traverse City community and serve the needs of their children.

We pride ourselves in being an exceptional clinic where your kids come first. Our practice works hard to meet the needs of children from infancy through college. Compassionate, knowledgeable and supportive staff is the cornerstone of TAPAC’s quality care. All of our pediatricians and medical staff are highly trained and professional specialists, maintaining the highest level of accreditation in pediatrics to address the special needs of infants, children and teens.

We strive to treat each and every patient as we would want our own children to be treated. Our doctors and staff look forward to building a relationship with you and your family.

  • Dr.
    Sarah Mulder

    Dr. Mulder grew up in central Michigan and graduated from Michigan State University’s College of Human Medicine. She completed her residency at the Cleveland Clinic Children’s Hospital where she stayed on for chief resident position. She has worked caring for children in Traverse City since 2009 and has been with TAPAC since they opened in 2011. Dr. Mulder enjoys caring for newborns and has a special interest in breastfeeding as well as preventative medicine. She also loves her school aged and adolescent patients as well as the special challenges they sometimes present. Like all of the providers at TAPAC, Dr. Mulder understands the importance of child and adolescent mental health and has years of experience caring for patients with ADHD, depression, anxiety and autism. 

    Dr. Mulder lives in Traverse City with her two school aged children. She enjoys reading and music as well as being outside biking with her kids, gardening and running.

  • Dr.
    Karla Smith

    Her medical training includes both a pediatric residency and fellowship in pediatric pulmonology at James Whitcomb Riley Hospital for Children at Indiana University. In addition to being board certified in pediatrics, she has also earned certification through the American Board of Pediatrics, Sub-Board of Pediatric Pulmonology from 1992- 2006. Dr. Smith cares for many of our areas’ children with pediatric lung disease. Dr. Smith has one adolescent son.  She enjoys outdoor sports, gardening, and cooking.

  • Dr.
    Benjamin Hazen

    Originally from North Canton, Ohio, Dr. Hazen earned his medical degree at the University of Pittsburgh and completed residency training at UPMC Children's Hospital of Pittsburgh. In 2021, he relocated to Traverse City, Michigan and joined TAPAC. Dr. Hazen loves taking care of children of all ages. He and his wife have two active young children and two loveable kittens. He enjoys spending time with family, gardening, biking, hiking, and cooking.   

  • Dr.
    Megan Coggon

    Dr. Coggon, a Traverse City native, received her medical degree from Wayne State University in Detroit and completed her pediatric residency training at Washington University’s Saint Louis Children’s Hospital in Saint Louis, Missouri. She moved back to Northern Michigan in 2017 and spent four great years in Charlevoix working in outpatient pediatrics as well as providing inpatient hospital care. Dr. Coggon loves her job as a general pediatrician and enjoys being able to participate in patient care from newborns through young adulthood. She and her husband are both excited to be back to their mutual hometown and share the great experiences they had growing up with their own young children now. Outside of the office, Dr. Coggon is an avid reader, enjoys hiking and loves treasure hunting in thrift and antique stores.

Staff Information

All of our nurses are fully trained pediatric specialists and can answer any of your questions. In addition, nurses can help you schedule your next appointment provide procedure authorizations and specialist referrals as needed.

Our certified biller can answer questions about insurance coverage and assist you in obtaining payment authorization from your provider.

Friendly and knowledgeable receptionists are available keep you and your child at ease during your visit. They have all the information required to ensure a quality visit and assist you with your billing.

Our Location

Find us on the map

Hours of Operation

Phone lines turn on half an hour before opening for appointment scheduling.


8:00 am-12:00 pm

1:00 pm-5:00 pm


8:00 am-12:00 pm

1:00 pm-5:00 pm


8:00 am-12:00 pm

1:00 pm-5:00 pm


8:00 am-12:00 pm

1:00 pm-5:00 pm


8:00 am-12:00 pm

1:30 pm-5:00 pm


9:00 am-12:00 pm



What our patients say about us

  • "Both of my children were patients of TAPAC, and I can only say Very Good Things about all the services offered. Even when my kids were older, they chose to continue to see Dr. Sara Mulder through college, and I'm so grateful for her care of their physical, mental, and emotional needs during this time of growth. Thank you to all of you who make up the amazing team that is TAPAC."
    Carla W.
  • "I really appreciate the trouble they go through to keep the kids safe during this whole covid thing. Separate docs for healthy kids vs sick. Nice front desk staff. have a doc that specializes in asthma."
  • "We have had nothing but great experiences here at TAPAC. This practice is equipped with very knowledgeable clinical staff and very friendly administrative staff. Our son is comfortable here and loves seeing his primary Dr Koehler but has also had great experiences with Dr Stilwell and Dr Mulder."
    TRINH E.
  • "We couldn't be happier with Dr. Mulder. She always takes wonderful care of my kids. Listens to my concerns and never rushes us."
    Katie S.
  • "I was in the area on vacation with a sick kid. They were able to get me in the same day very quickly and help us out. They were very accommodating and helpful."
    Bryant E.