Our Team

The physicians, staff and every member of our team here at Next Generation Pediatrics is committed to providing quality personal care to our patients while embracing their role in nurturing a child’s emotional, physical and cognitive development.

Our team consists of experienced pediatricians, physician assistants and friendly staff members who are truly passionate about what we do. We take great joy in watching our young patients grow throughout the years, and look forward to building a relationship with you and your family.

Happy Halloween from NGP!


James P. Mortimer, D.O.

Dr. Mortimer is a native of Butler and has been practicing in the community since 2001. He obtained his undergraduate degree from Washington & Jefferson College in 1993. He earned his medical degree from Midwestern University Chicago College of Osteopathic Medicine in 1997. Dr. Mortimer returned to Pittsburgh for an internship at St. Francis Medical Center in 1998. His residency training was at Mercy Hospital in Pittsburgh which was completed in 2001. Dr. Mortimer has been Board Certified in pediatrics since 2001. He returned to his hometown to practice general pediatrics and founded Next Generation Pediatrics in 2003. His special interests include pediatric asthma, musculoskeletal injuries, and care of complicated neonates.

Shelly Suski, PA-C, IBCLC

Shelly currently resides in the Pittsburgh area, where she attended graduate school, but she grew up in Belle Vernon, PA. She received her Bachelor of Science in Biology from California University of Pennsylvania in 2011, then gained a Masters of Physician Assistant Studies in 2013, from the University of Pittsburgh. Shelly began her career in the field of internal medicine, where she gained valuable experience, but realizing that her passion resided in pediatric medicine is what brought her to Next Generation Pediatrics. Shelly is especially interested in allergies, endocrine, and gastrointestinal disorders.


McKenzie Calhoun, PA-C

McKenzie currently resides in the Butler area, where she grew up. She received her Bachelor of Health Sciences from Saint Francis University in 2016, and then received her Masters of Physician Assistant Sciences in 2017 from Saint Francis University. Since starting her journey in the medical field, McKenzie has always had a strong interest in pediatric medicine which led her to Next Generation Pediatrics. McKenzie is especially interested in allergies and genetic disorders. In her free time, she enjoys reading, spending time with family and enjoying outdoor activities.


Sonja Downing, Front Office Supervisor

Karen Wise, Medical Receptionist

Krista Stroup, Medical Receptionist


Brenda Daubner, LPN, Clinical Manager

KC Curry-Penrod, RN

Kelly Ruby, CMA

Lisa Henderson, RN

Rachel Lorenz, LPN

Courtney Bellin, RN (pic unavailable)


Kelli Sovek, Office Manager

Jackie Reay, Billing Manager

Happy Halloween from NGP!