We are fortunate to partner with Washington University and St. Louis Children’s Hospital. This relationship enhances our ability to provide excellent care for our patients.
Elizabeth Atkinson, MD
Medical Degree: Hahnemann University (now known as Drexel University) (1994)
Residency: Rainbow Babies and Children’s Hospital (1997)
Personal: Elizabeth, otherwise known as Betsy, is married and has three children. She and her husband are originally from the East Coast and often travel back to visit family. Hiking, biking and traveling are a few of her favorite hobbies. She is an active volunteer in our community.
Currently accepting new patient transfers and newborns.
Archna Calfee, MD
Medical Degree: Washington University (2001)
Residency: Pediatrics, Brown University (2004)
Personal: Archna is married and has two children. In her free time, when she is not serving as her family chauffeur, she enjoys reading and traveling. She is a member of the Ladue Education Foundation Board as well as a member of the We Stories Board. She has also served as a member of the Washington University Medical Center Alumni Association Executive Council and served on Case Western Reserve University’s Visiting Scholarship Committee and as an Alumni Admissions Ambassador for the university.
Currently accepting newborns only.
Jennifer Horst, MD
Medical Degree: University of Missouri (2007)
Residency: Pediatrics, Washington University in St. Louis (2013)
Fellowship: Pediatric Emergency Medicine, Washington University in St. Louis (2016)
Personal: She and her husband enjoy exploring the outdoors with their two young children and dog.
Currently accepting new patient transfers and newborns.
Maggie McCormick, MD
Medical Degree: Loyola University Chicago (2004)
Residency: Pediatrics, University of Massachusetts (2007)
Chief Residency: Pediatrics, University of Massachusetts (2008)
Personal: Maggie is married and the mother of three children. Outside the office, she can usually be found at a local hockey rink or baseball field watching her kids play sports. She is an active community volunteer and loves to spend time outdoors.
Currently accepting newborns only.
Christopher Pingel, MD
Medical Degree: Saint Louis University School of Medicine (2007)
Residency: Ohio State University / Nationwide Children’s Hospital (2010)
Personal: Chris and his wife returned to St. Louis in 2010 after the birth of his daughter. He worked as a pediatric hospitalist at St. Louis Children’s Hospital and was an instructor of Pediatrics at Washington University School of Medicine. He then became part of the Children’s Clinic family in 2012.
Currently accepting new patient transfers and newborns.
Daniel Plax, MD
Medical Degree: Washington University in St. Louis (1993)
Residency: Pediatrics, St. Louis Children’s Hospital (1996)
Personal: He is married and has four children and three grandchildren. Danny enjoys hiking, skiing, golfing and being outside, especially in Colorado.
Currently accepting newborns only.
David Sonderman, MD
Medical Degree: Loyola University Chicago’s Stritch School of Medicine (2012)
Residency: Pediatrics, St. Louis Children’s Hospital (2015)
Chief Resident: Pediatrics, St. Louis Children’s Hospital (2016)
Personal: David and his wife have four children and a yellow lab. He loves spending time with his family and cheering on the St. Louis Cardinals and the Fighting Irish of Notre Dame.
Currently accepting new patient transfers and newborns.
Stephanie Griesenauer, PNP
Bachelor’s Degree in Nursing: University of Missouri – Columbia (2004)
Pediatric Nurse Practitioner: St. Louis University (2014)
Personal: Stephanie is married and has three children. Most of her time outside of work is dedicated to her children and their sporting events and other activities. Spending time with family and friends is what she enjoys the most.
Jane Hicks, PNP
Bachelor of Science in Nursing: Medical College of Georgia (1974)
Masters in Nursing of Children: St. Louis University (1990)
Pediatric Nurse Practitioner: University of Missouri St. Louis (1994)
Personal: Jane has lived in St. Louis since 1977. She has two grown daughters who are both happily married, and two grandchildren! In her free time, Jane enjoys the outdoors, and stays active by walking and riding her bike. She loves to spend time with family, do puzzles, and watch British mysteries.
Christine Machicao, FNP
Bachelor of Science in Nursing: Bradley University (1997)
Masters of Nursing: Vanderbilt University (2000)
Family Nurse Practitioner: University of Missouri (2007)
Personal: Christine is married and has three children. In her free time, she enjoys teaching Jazzercise and is actively involved with her parish and community.
Melissa Oexeman, PNP
Bachelor’s in Nursing: University of Missouri – Columbia (2014)
Master’s (Pediatric Nurse Practitioner): Saint Louis University (2019)
Personal: Melissa was born and raised in St. Louis. She and her husband have one son, born in 2021, two dogs, and four nephews who they love spending time with. Melissa spends most of her free time with family and friends and she enjoys traveling and the outdoors.
