Our Medical Team

Dr. LiberDr. Peter I. Liber has been practicing pediatrics since he founded Wheaton Pediatrics in 1987. A native of Gary, Indiana, Dr. Liber earned his Biology degree, with honors, at the University of Chicago. He received his M.D. from Indiana University in 1984, and completed his residency at Children’s Memorial Hospital in Chicago in 1987. He is an instructor in Pediatrics in the Northwestern University Feinberg School of Medicine, who also speaks Ukrainian and welcomes the opportunity to care for Ukrainian-speaking patients. His other professional interests include caring for children with asthma, ADHD and internationally adopted children and their families, for whom he can offer pre-adoption counseling. He has traveled to Guatemala and volunteered with Timmy Global Health, an organization that helps deliver medical care to underserved communities. Dr. Liber is board certified in pediatrics and a fellow of the American Academy of Pediatrics. In 2008, 2010, 2012 and 2014, Chicago Magazine names Dr. Liber to its prestigious list of “Top Docs” – the only DuPage County pediatrician on the list. He has been active in the Lurie Children’s Hospital Medical Staff leadership for several years. In December 2017, Dr. Liber completed his two-year tenure as President of Lurie Children’s Hospital Medical Staff. Dr. Liber lives in Wheaton with his wife. They have been married more than 30 years and have raised 4 children, now young adults, pursuing careers of their own. Dr. Liber enjoys jogging, recreational cycling, vacationing with family and walking his dog, Charlie Brown.

Dr. GrunenwaldDr. Christienne M. Grunenwald began practicing pediatrics in 1994 at Wheaton Pediatrics. A native of the western suburbs, she attended Miami University in Ohio where she earned a B.A. in Zoology. She received her MD degree from University of Cincinnati College of Medicine and completed her residency at Children’s Memorial Hospital in Chicago. After working at Wheaton Pediatrics for 10 years, Dr. Grunenwald took time off to be a full time mother to her four children. She returned to Wheaton Pediatrics in 2016. She is certified by the American Board of Pediatrics and is a fellow of the American Academy of Pediatrics. Dr. Grunenwald has lived in Wheaton for over 20 years. Outside of work she enjoys bike riding, playing the piano and taking long walks on the beach in Michigan.

Dr. McCaulleyDr. Amanda McCaulley grew up as a military kid on bases around the world before ending up in Columbia, SC for high school. She attended the University of the South in Sewanee TN and graduated summa cum laude with a degree in biology. She received her medical education at Dartmouth Medical School in Hanover, NH and then completed her pediatric training at the Naval Medical Center in Portsmouth, VA in 2009. She served as a Navy pediatrician in Okinawa, Japan and Jacksonville, FL. She then spent three years working as a pediatrician in the National Health Service in Scotland. Mostly recently she practiced rural general pediatrics in Dansville, NY at Noyes Hospital and Stony Brook Pediatrics prior to relocating to Wheaton. She has been an assistant professor of pediatrics at the Uniformed Services University of Health Sciences and a clinical instructor of pediatrics at the University of Rochester. She is a Commander in the Navy Reserves which sometimes takes her on exciting adventures. She has four children and in her small amount of spare time enjoys trail running, hiking and reading good books while drinking coffee! Her interests include tropical and travel medicine, asthma, eczema and allergy care, breastfeeding and newborn care. She is a board certified pediatrician and fellow of the American Academy of Pediatrics.

Claire Creed HeadshotDr. Claire Creed grew up in the western suburbs and attended the University of Illinois in Urbana-Champaign, graduating with a degree in Molecular & Cellular Biology. She received her M.D. from Rush University Medical College in Chicago and completed her pediatric residency at Loyola University Medical Center. Dr. Creed enjoys getting to practice in the Wheaton area, where she was raised. She loves getting to meet new patients and hopes to care for many families for years to come. Dr. Creed enjoys spending time with her friends and family, especially when it includes going on ski trips, working on sewing & craft projects, and playing the piano.

Dr. Tom Roberts grew up in the northwest suburbs of Chicago and after spending seven years as a counselor and assistant site director for Northwest Special Recreation, decided on a career working with children. He graduated with honors with a Degree in Biology from Eastern Illinois University in 2006. He then received his D.O. from Midwestern University’s Chicago College of Osteopathic Medicine in 2010 and completed his residency in pediatrics at Hope Children’s Hospital in Oaklawn, Illinois in 2013. Dr. Roberts is on staff at Rosalind Franklin Chicago Medical School as adjunct faculty instructing medical students. He has been in private practice in the south suburbs of Chicago the past six years and was the former Chair of Normal Newborn Committee at Advocate Christ Medical Center. Dr. Roberts is fluent in Spanish and able to provide care for Spanish-speaking patients. His areas of interest include general pediatric care, pediatric development, nutrition, asthma and ADHD. Dr. Roberts is board certified in pediatrics and a Fellow of the American Academy of Pediatrics. Tom lives in the western suburbs with his wife and daughter. He enjoys running, reading, travelling, hiking, playing guitar, and spending time with his family.

Dr. Rucoba

Dr. Ruben J. Rucoba offers On-Demand Telemedicine visits to all PediaTrust patients. For more information on On-Demand Telemedicine visits, click here.

Dr. Rucoba has been practicing pediatrics since 1992, and has been at Wheaton Pediatrics since 1999. A native of the south suburbs of Chicago, Dr. Rucoba attended Loyola University of Chicago, where he earned his degree B.A. with honors in English. He received his M.D. from the University of California, San Francisco, and completed his residency at Children’s Memorial Hospital in Chicago, now Lurie Children’s Hospital. Prior to working at Wheaton Pediatrics, Dr. Rucoba worked at a community health center in Chicago and at Children’s Memorial Hospital (Lurie Children’s Hospital), where he was a faculty member of the Department of Pediatrics, teaching medical students and residents. He is still an Instructor in Pediatrics in the Northwestern University Feinberg School of Medicine. In December 2016, Dr. Rucoba became the Medical Director of Wheaton Pediatrics. He will continue to see his patients with special healthcare needs for well care, while tending to the Practices administrative needs. Dr. Rucoba is board certified in pediatrics, and a fellow of the American Academy of Pediatrics. Dr. Rucoba is also a medical writer who has written for the AAP, continuing medical education companies, and various health websites. He lives in Wheaton with his wife and four children (including twins), and enjoys reading, golf, biking and playing chess.

Nurse Practitioners

Wheaton Pediatrics employs two expert health care providers who deliver a unique blend of nursing and medical care. These Pediatric Nurse Practitioners (PNPs) are registered nurses with graduate academic degrees and advanced pediatric clinical experience. This enables them to diagnose and manage most pediatric illnesses, either independently or as part of a health care team. The PNP model focuses on the whole person, not just the illness. PNPs are often able to spend more time with families and children, providing high-quality medical care and health counseling.

Vanda Marsh, NPVanda Marsh has worked in pediatrics for more than 30 years and has been affiliated with Wheaton Pediatrics since it was founded in 1987. Vanda graduated summa cum laude from St. Francis Hospital School of Nursing, and graduated with a degree in Nursing from Northern Illinois University. In 2000, she completed her master’s in Nursing and Advanced Practice Pediatrics Nurse Practitioner at the University of Illinois at Chicago. Shortly thereafter, she was inducted into the Sigma Theta Tau Honor Society of Nursing. She is an adjunct faculty member of the University of Illinois and an asthma educator certified by the National Asthma Education Certification Board. For nearly two decades, in conjunction with her work at Wheaton Pediatrics, Vanda worked in emergency medicine at Children’s Memorial Hospital. Since 2006, Vanda has routinely traveled to Haiti with Little by Little, a non-profit of Glenview, Illinois, which provides medical care to people in need around a rural town called Gramothe.

Vanda’s special professional interests include asthma treatment and education and Attention Deficit Disorders. Vanda is certified by the Pediatric Nursing Certification Board and a fellow of the National Association of Pediatric Nurse Practitioners. In September of 2012, Vanda was presented with the Outstanding Alumni Excellence in Leadership Award from St. Francis College of Nursing. She was also presented with the Outstanding Preceptor Award by the University of Illinois, in April 2016. She has lived in Wheaton with her husband and three daughters for more than 30 years. She enjoys reading, baking, visiting her grandchildren, traveling with her husband, and participating in church activities.

Cathy Moroni, NP (1)Catherine Moroni joined Wheaton Pediatrics in 2003. Cathy was born in Ohio, but raised in Ohio, Connecticut, Illinois and Indiana. She graduated from the University of Dayton, in Ohio, with a degree in Psychology and obtained her Master’s in Nursing and completed the Pediatric Advanced Nurse Practitioner program at the University of Illinois at Chicago in 2003. She is a member of the Sigma Theta Tau Honor Society of Nursing. Cathy is an adjunct faculty member of the University of Illinois College of Nursing. She is board certified by the Pediatric Nursing Certification Board and a fellow of the National Association of Pediatric Nurse Practitioners. Prior to Wheaton Pediatrics, Cathy worked at Children’s Memorial Hospital in the Intensive Care Unit and Specialty Ambulatory Clinics. Her clinical interests include asthma, skin care, developmental pediatrics and providing support for families of children with chronic health conditions. A resident of River Forest, Cathy is married, has four children and four granddaughters, a cat and a dog. She enjoys spending time with her family, gardening, reading and bike riding.

Catherine Pierotti, DNP, RN, CBC, CPNP-PC, is a primary care pediatric nurse practitioner and certified breastfeeding counselor. She was born and raised in downtown Wheaton and was a Wheaton Pediatrics patient as a child! She completed her Bachelors of Science in Nursing at Hope College and her Doctorate of Nursing Practice (DNP) from Rush University Medical Center. She brings seven years of pediatric acute care experience as a resource team nurse at Lurie Children’s Hospital of Chicago. She is also a member of the National Association of Pediatric Nurse Practitioners (NAPNAP). Her clinical interests include lactation counseling, childhood diabetes, asthma and newborn education. In her free time, Cat loves to run, hike, and travel with her husband, as well as spend quality time with her family and close friends.

Behavioral Health


Annette Popernik is a Licensed Clinical Social Worker at Primary Care Psychology Associates, LLC. She received her bachelor’s degree in Psychology and Master of Social Work with a specialization in mental health from the University of Illinois at Urbana-Champaign. She completed her Clinical Internship at Alexian Brothers Behavioral Health Hospital in the Adolescent Partial Hospitalization Program. As a graduate student, she also trained in and facilitated Vida Alegre, a culturally and linguistically adapted Cognitive-Behavioral Group Therapy designed to treat depressed Latino immigrant mothers. She was also a fellow for the Minority Fellowship Program-Youth through the Council on Social Work Education. She has led trainings on Strategies and Interventions for Chronic Health Conditions. Annette has worked in outpatient and hospital settings providing psychotherapy to children and adolescents struggling with mood disorders, suicidality, behavior issues, anger, and co-occurring physical and mental health conditions.

Annette specializes in cognitive-behavioral therapy, exposure therapy, motivational interviewing, and dialectical behavior therapy. She uses a strengths-based approach to empower her patients to believe in themselves and guide them towards healing. Annette’s therapeutic style is person-centered and draws on the patient’s strength as the expert of their own experiences. She is passionate about working with youth and multicultural awareness. Annette strives to integrate physical and mental health in order to promote emotional wellness.

Areas of expertise: Pediatric Mood and Anxiety Disorders, Chronic Health Conditions and Chronic Pain, Adjustment Disorders, Grief, Self-Injury, Suicidal Ideation, School Anxiety/Avoidance, Anger Management, Family Conflict, and Culturally Sensitive Therapy.

Annette is fluent in Spanish.