Rita E. Thieme, MD, FAAP

Dr. Thieme is a Board Certified Pediatrician who has been with Castle Rock Pediatrics for 16 years. She received her MD in 1989 from the University of Colorado, followed by her residency in Pediatrics at The Children’s Hospital in Denver. Dr. Thieme also had two years of specialty training in Pediatric Nephrology (Kidney Disease).

Following her fellowship, Dr. Thieme worked as a Pediatric Emergency Physician at Swedish Medical Center prior to joining Castle Rock Pediatrics in 1998.  Dr. Thieme is board-certified by the American Board of Pediatrics and is also a fellow of the American Academy of Pediatrics. She has been selected as one of America’s Top Pediatricians by the Consumers’ Research Council of America. Dr. Thieme was Vice-Chairman of Pediatrics at Sky Ridge Medical Center from 2003 – 2005. With her strong interest in the current health care crisis in this country she serves as a delegate for the Colorado Medical Society.

Dr. Thieme’s interests include infants and children of all ages, children with underlying illness, such as heart disease, asthma, kidney disease, congenital defects, premature infants, multiples and children with special needs.

In her spare time, she enjoys spending time with her son, who is a graduate student at the University of Minnesota. She also enjoys bicycle riding, cooking and gardening.

Randal E. Williams, PA-C

Randy was born and raised in Colorado and attended Smoky Hill High School.  He then attended Kansas Wesleyan University where he studied Biology and played football for the “Coyotes.”

Randy returned home to Colorado and attended the Child Health Associate Physician Assistant Program at the University of Colorado Medical Campus

He currently resides in Castle Rock and has worked at Castle Rock Pediatrics since June of 2012. Randy is also a member of the Pediatric Child Fatality Prevention Team here in Colorado.  His clinical interests include pediatric preventative medicine, pediatric sports medicine, pediatric orthopedics, and pediatric dermatology.  Randy also enjoys teaching PA/medical students in the clinic.where he earned his Physician Assistant Certification in June of 2000.

Randy enjoys working out at the gym, playing sports, going camping, and riding his Harley Davidson Motorcycle.

Dr. Caroline Kabel-Kotler DO

Dr. Caroline Kable-Kotler is a Board Certified Pediatrician who recently joined Castle Rock Pediatrics in November, 2018.  Dr. Kotler and her family moved to Colorado from New Jersey in 2017. She received her medical degree from Rowan University School of Osteopathic Medicine.  She completed her Pediatric Internship at the Kennedy Health System in Stratford, NJ and then her Pediatric Residency at The Cooper University Health Center in Camden, New Jersey.

Dr. Caroline Kabel-Kotler, DO loves working in a smaller pediatric practice.  In this setting she can form relationships and bond with the patients and families. She is passionate about providing Pediatric care to children of all ages with a myriad of medical conditions from birth to early adulthood and has a focus in Behavioral Medicine and Educational Advocacy.


In her spare time Dr. Kotler enjoys spending time with her husband of 25 years and their three children.  She and her family love to ski and hike and spend time in the mountains.

Laura Westover, PA-C-Pediatrics

Laura Westover is a native Coloradan. She graduated from the University of Denver and attended the Child Health Associate/Physician Assistant Program at the University of Colorado Medical Campus. She also holds a Certificate of Added Qualification specialty designation in Pediatrics.

Laura is passionate about building long-term relationships with families and loves being able to watch children grow and develop. She seeks to treat the whole patient and is dedicated to helping the whole family system thrive. Prior to joining Castle Rock Pediatrics, she spent six years working in a Developmental-Behavioral Pediatric subspecialty practice and hopes to bring that experience and knowledge to the practice.

Laura is thrilled to be working in the wonderful community of Castle Rock where she lives with her husband, young son, and rescue dog. In her spare time she enjoys reading, traveling, and staying active in the outdoors. Becoming a mother has added to Laura’s understanding of pediatric practice and she loves to come alongside parents in their journey of parenthood keeping kids safe, healthy, and thriving from birth through young adulthood.