Timothy D. Stein, LMFT, CSAT-S — sex addiction and betrayal trauma therapist, co-founder of Willow Tree Center for Healing and Recovery in Santa Rosa

License: Licensed Marriage and Family Therapist #35896

Co-Founder, Willow Tree

Timothy D. Stein LMFT, CSAT-S, CPTT-S, CCPS

Certified Sex Addiction Therapist – Supervisor 
Certified Clinical Partner Specialist – Supervisor
Certified Partner Trauma Therapist – Supervisor

Timothy D. Stein is a senior clinician specializing in sex addiction and betrayal trauma recovery. Licensed since 1999 and trained directly under Dr. Patrick Carnes as a Certified Sex Addiction Therapist (CSAT), Tim integrates structured addiction treatment with partner trauma models to support individual sobriety and relational repair.

He provides individual, group, and couples therapy and is trained in advanced trauma modalities including Post Induction Therapy (PIT), EMDR, and Brainspotting. Tim serves as a Supervisor for CSAT and CPTT certification candidates and currently serves as Board President of The American Foundation for Addiction Research (AFAR), contributing to the advancement of research-informed addiction treatment.

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