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Conditions & Advice
Parenting Tips and Advice
From bringing home a new baby to building trust with your teen, our pediatric experts share guidance to help you navigate the ups and downs of parenthood.
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Research & Innovation
It starts with a Q:
For the latest cutting-edge research, innovative collaborations and remarkable discoveries in child health, read stories from across all our areas of study in Q: Advances and Answers in Pediatric Health.
ParentSmart HealthlineTM
Caring pediatric nurses are available 24/7 to help answer your questions.
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Children’s Hospital Colorado
Anschutz Medical Campus
13123 East 16th Avenue
Aurora, CO 80045
Emergency and urgent care locations
In life-threatening emergencies, find the emergency room location nearest you. For non-life-threatening medical needs when your pediatrician is unavailable, visit one of our urgent care locations.
Urgent care locations (hours vary)
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All locations
See a listing of all our Children’s Hospital Colorado locations including inpatient, outpatient, therapy, surgery facilities and more.
Locations near you
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Insurance plans accepted
We participate with most major health insurance plans and national transplant networks.
Prepare for your visit
We want to make sure you know what to expect before you arrive.
Get to know Thomas Walker, MD
Departments and Programs
Conditions Treated
Experience and background
Undergraduate 1987
University of Notre Dame (IN)
Medical Education 1995
Oregon Health & Science University School of Medicine
Residency 1998
Oregon Health & Science University
Fellowship 2004
Harvard University/Boston Children's Hospital Program
Attending of the Year 2016
Blind Squirrel
Harvard Medical School Fellowship in Pediatric GI and Nutrition
Teacher of the Year 2018
Fellowship in Pediatric Gastroenterology and Hepatology
Faculty member of
Provider's location(s)
Patient ratings and reviews
Learn more about patient ratings and reviews
Meet other experts
Meredith McIntee, MSN
Certified Pediatric Nurse Practitioner
Ronald Sokol, MD
Gastroenterology - Pediatric, Pediatric Transplant Hepatology
Patient ratings and reviews are not available Why?
Melanie Merrill-Kennedy, PA-C
Physician Assistant
Edwin Liu, MD
Gastroenterology - Pediatric
Calies Menard-Katcher, MD
Gastroenterology - Pediatric
Patient ratings and reviews are not available Why?
Seth Septer, DO
Gastroenterology - Pediatric
Stephanie Petersburg, PA
Physician Assistant
Samantha Woodruff, MD
Gastroenterology - Pediatric