Meet Our Provider Staff!

All of our pediatricians are board certified by the American Board of Pediatrics and are members of the American Academy of Pediatrics. The Pediatric Nurse Practitioners (PNP), Child Health Associates (CHA) and Physician Assistants (PA) employed by Advanced Pediatric Associates have received specialized graduate level education and training in pediatrics, and work in a partnership with our pediatricians to provide primary health care services to patients. They are licensed and / or certified in their specialty. 

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We Are Pleased to Introduce the Members of Our Clinical Provider Staff!

Our provider staff consists of physicians, nurse practitioners and physician assistants that specialize in pediatric care for children from infancy through adolescence. These providers bring many combined years of experience, a wide range of specialized interests, and enthusiasm and devotion to providing the very best in health care to our patients. As part of our dedication to continuing medical education, our providers attend a number of clinical presentations each year, and our clinical committee meets regularly to review the latest advancements in clinical care. In addition, our providers have a close relationship with specialists and staff at Children's Hospital Colorado and participate in the University of Colorado Health Sciences Center pediatric teaching program.

Some of the providers at Advanced Pediatrics see patients at more than one office. In general, we recommend that patients choose two or three providers whom they prefer to see most often. Our care coordinators will do their best to accommodate your choice of providers when making appointments. Patients are always welcome to see any of our providers that have an appointment available. 

To sort our provider staff by office location, click on the appropriate button below:

Board Certified Pediatricians

Stephanie S. Stevens MD, FAAP

Dr. Stephanie Stevens graduated from the University of Colorado Health Sciences Center in 1999, completing her pediatric residency at Children's Hospital Colorado, where she was Chief Resident. During her residency, Dr. Stevens received the "Golden Apple Teaching Award" and the "Bruce Garber Award" as the most outstanding senior resident. As a resident, she founded the Healthy Beginnings Medical Clinic to provide health care for children of low-income, single-parent families. Dr. Stevens joined Advanced Pediatrics in 2003, becoming a partner in 2005. In 2016, she was awarded the "Career Teaching Scholar Award" from the Department of Pediatrics at CU Medical School for her outstanding contributions to pediatric education. She is a Fellow of the American Academy of Pediatrics, an Associate Clinical Professor of Pediatrics for the University of Colorado School of Medicine, a member of the Medical Board at Children's Hospital Colorado, a member of the Board with Colorado Pediatric Collaborative, a member of the Clinical Faculty Affairs Committee and the steering committee for the Practice Based Research Network at Children's Hospital Colorado, Chair of the Physician Credentialing Committee at Parker Adventist Hospital, and Director of the Healthy Beginnings Medical Clinic for Warren Village. In addition, she is a sign language interpreter for the deaf and has a master's degree in physical therapy. Her interests in pediatrics focus on sports medicine, child development and asthma. Her personal interests include skiing, hiking, triathlons and spending time with her family. She has two "almost grown" sons.

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Benjamin Apple MD, FAAP

Dr. Apple graduated from Carson-Newman University in 2005, majoring in biology and psychology with a minor in German. He attended Medical School at the University of Tennessee Health Science Center, where he was named an Albert Hand Scholar; he followed that with an internship and residency at Children's Hospital Colorado. He is board certified by the American Board of Pediatrics, a Fellow of the American Academy of Pediatrics, and completed a fellowship in Medical and Biochemical Genetics in 2018. He is also a member of the Mountain States Regional Genetics Network, the Society of Inherited Metabolic Disorders, and the American College of Medical Genetics. Prior to joining APA in March of 2018, Dr. Apple worked in urgent care at National Jewish. His pediatric interests include primary care for children with special healthcare needs, developmental delay and intellectual disability evaluation and management, foster care, and mental health. His personal interests include woodworking, reading, fishing, traveling, music, and movies. Dr. Apple and his wife, Kari, have three children: Miles, Wilson, and Madison.

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Nancy J. McDermott MD, FAAP

Dr. McDermott graduated from the University of Medicine and Dentistry of New Jersey in 1983, following a bachelor's degree and graduate studies in Psychology. She completed her pediatric residency training at Schneider Children's Hospital in Hyde Park, New York, in 1987. Prior to joining Advanced Pediatrics in 2008, Dr. McDermott worked as a pediatrician for over 20 years in Denver and Florida. She has practiced as both a primary care pediatrician and an instructor for pediatric urgent care. She is a Fellow of the American Academy of Pediatrics, a Pediatric Instructor at the University of Colorado Health Sciences Center, and is certified in pediatric advanced life support. Her interests in pediatrics focus on newborn and adolescent health. Her personal interests include music of all kinds, theatre and sports. Dr. McDermott and her husband have an adult son and daughter.

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Pediatric Nurse Practitioners and Physician Assistants

Kirstin Cox RN, MSN, CPNP-PC

Kirstin Cox graduated from the University of Colorado Health Sciences Center with a masters of science in nursing and certification as a Pediatric Nurse Practitioner in 2002. Before joining APA in April 2018, Kirstin amassed 15 years of PNP experience and 24 years in pediatrics in both Michigan and Colorado. She is a Board Certified Pediatric Nurse Practitioner and an International Board Certified Lactation Consultant, and is certified in pediatric advanced life support. In addition, Kirstin is a member and volunteer of the Southwest Region Women's Club and General Federation of Women's Clubs, which focus on community improvement by enhancing the lives of others through volunteer service. Kirstin's pediatric interests include preventative medicine, newborn care, and breastfeeding and lactation support. Her personal interests include spending time with friends, hiking, skiing, cycling, triathlons, attending arts and cultural events, and traveling. Kirstin and her sidekick - a 7-year-old black Labrador rescue named Duggan - enjoy playing outside and visiting with family in beautiful Wisconsin. 

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Joy Diamond RN, MS, CPNP-PC

Joy Diamond graduated from the University of Colorado School of Nursing with a masters degree in nursing and board certification as a Pediatric Nurse Practitioner in 1993, where she was awarded the Outstanding Graduate Award. She practiced as a pediatric nurse practitioner for the Children's Hospital Cancer Center in Houston, Texas for five years, followed by a year at the University of Minnesota Bone Marrow Transplant Center. Joy joined Advanced Pediatrics in 1998. She is very involved in the National Association of Pediatric Nurse Practitioners, serving as Colorado president for the year 2001 - 2002. She served as a tutor for Whiz Kids, an inner city mentoring program, and sings in the choir at Trinity United Methodist Church. Her interests in medicine focus on working with children with special needs and chronic illnesses, as well as educating families about preventative health issues. Her personal interests include music, volleyball, skiing, watching University of Kansas basketball games, and spending time outdoors with her family. She and her husband have two young children.

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Wesley Gallegos MPAS, CHA/PA-C

Wesley Gallegos graduated from the University of Colorado Child Health Associate/Physician Assistant Program in 2017, after earning a BA in Foreign Languages, Literature, and Culture, with a Minor in Spanish, from Colorado State University (Fort Collins). While in PA school, Wesley was in the Urban Underserved track, which focuses on increased education regarding issues that affect patients and practices in urban/underserved populations. Prior to joining Advanced Pediatrics in 2017, Wesley completed a multitude of clinical internships that included family practice, general pediatrics, childhood Diabetes, pediatric cardiology, newborn nursery, rural health, and ENT. He is a member of the American Academy of Physician Assistants and a native Spanish speaker, with special pediatric interest in preventative medicine, pediatric ADHD, and depression. Wesley enjoys running, concerts, technology, movies, and comedy shows. He has plenty of family in Colorado, and loves spending time with his parents, sister and brother-in-law, and two nieces. 

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Heather Meister MPAS, CHA/PA-C

Heather Meister graduated from the University of Colorado Health Sciences Center Physician Assistant Program in 2011, following a bachelor of science degree in psychology from the University of Arizona in 2008. Prior to joining Advanced Pediatrics in 2011, Heather completed various pediatric internships including pediatric primary care, newborn nursery / NICU, infectious disease, cardiology and emergency medicine rotations. She is a member of the American Academy of Physician Assistants and the Colorado Association of Physician Assistants, and is certified in pediatric advanced life support. Her interests in pediatrics focus on preventative medicine and cardiology. Her personal interests include singing, waterskiing and hiking. She and her husband have two young sons.

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Looking for a new pediatrician? - Aurora, Centennial, Parker and Denver / Stapleton - Call our Patient Care Line at 303-699-6200.