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I've always loved working with children as they bring so much joy and energy wherever they go. Being a part of their lives and a guiding presence through their childhood is both a pleasure and privilege!


Dr. Katherine Williams joined our practice in early 2018. She attended the University of Washington for both her undergraduate education and medical school. Dr. Williams completed her residency at Children’s Hospital of Wisconsin. Before joining Allegro Pediatrics, Dr. Williams worked in urgent care at Seattle Children’s Hospital. She enjoys speaking to new parents about newborn care and infant-to-toddler development, and has a special interest in acute care.

Dr. Williams is married with three children. She enjoys making happy memories with her family, cooking (and eating!) good food, reading, traveling, and hanging out with friends. Dr. Williams loves watching Husky football and playing board and video games. She also plays piano and enjoys attending concerts and musicals.

Occasionally, providers may not be accepting new patients. Please check with the receptionist when scheduling an appointment.


  • Undergraduate: University of Washington
  • Medical School: University of Washington School of Medicine
  • Residency: Children's Hospital of Wisconsin, Wauwatosa, WI

Languages Spoken


Days Available

Monday , Tuesday , Thursday



22620 SE 4th Street Suite #200
Sammamish, WA 98074

Location Details

Written by Dr. Williams

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Does my child need antibiotics?

It's cold and flu season and you may be wondering why your provider isn't prescribing an antibiotic medication for your child. Dr. Williams answers your questions about antibiotics.