Willow Tree Center
Our Providers

Katie Wilson, MD

Dr. Wilson grew up in Oregon, attended medical school at Wake Forest University in North Carolina and completed psychiatry residency and child psychiatry fellowship training at Vanderbilt University Medical Center in Nashville, Tennessee. She moved to the St. Louis area with her husband and two sons in 2011. Dr. Wilson worked at CenterPointe Hospital and Psych Care Consultants, and consulted at Preferred Family Healthcare from 2012 until 2016.

Dr. Wilson is Board Certified in Psychiatry and Child and Adolescent Psychiatry by the American Board of Psychiatry and Neurology. She is a member of the American Psychiatric Association and the American Association of Child and Adolescent Psychiatry.

Yasmine K. Fehr, MSN, RN, FPMHNP-BC

Yasmine is originally from Tennessee, and moved to St. Louis to attend Washington University in St. Louis, where she obtained her Bachelor of Arts degree in Psychology in 2006. She worked for non-profit organizations following graduation and decided to pursue her passion in nursing. She completed her Bachelor of Science degree in Nursing from Maryville University in 2011, and completed her Master of Science in Nursing in 2017. She has experience working at CenterPointe Hospital and has consulted with Preferred Family Healthcare. 
Yasmine is Board Certified as a Psychiatric Nurse Practitioner by the American Nurses Credentialing Center. She is a member of the American Psychological Association, the American Psychiatric Nurses Association, and Sigma Theta Tau International Honor Society of Nursing.
Are you being affected by substance use problems or someone else's addicted behavior? Are you seeking better coping skills, feeling stuck, in need of change? Do you want help developing strategies for handling stress, work on relationship dynamics, manage anxiety/worry/tension, sobriety, health or personal growth? You and your family members can acquire skills, explore feelings, thrive with better self care. I work with adolescents, families, and adults effected by substance use, codependency, mental or physical health issues, grief/loss, other personal challenges. 

I have extensive experience with substance use and mental health disorders, codependency dynamics, individual and family counseling. My clinical hypnotherapy skills can enhance therapy, insight, self-esteem, & growth. I have a direct, solution focused, coaching approach to psychotherapy. Individuals looking for more effective alternatives to their coping methods will find my skills practical, supportive & empowering. 

My psychotherapy practice is available through Willow Tree Center (office of Dr. Katie Wilson, MD) 9979 Winghaven Blvd, Ste 202, O'Fallon, MO 63368. I see clients on Wednesday evenings, Thursday mornings and Saturdays. Call 636-695-2690 to schedule your appointment.