Assessment & Treatment Associates-Mountlake Terrace is an addiction treatment center and counseling service located at 21907 64th Ave W IESL Resource Room, Mountlake Terrace, WA 98043. We offer support for individuals seeking help with addiction and provide counseling services tailored to meet their needs. Our office is open Monday through Thursday from 9 AM to 5 PM. For more information, visit our website at assesstreat.com or call us at +14252891600.

What they offer:

Outpatient Aftercare Continuing Care Intensive Outpatient IOP Mental Health Services Standard Outpatient Court Ordered Legal Diversion Programs For Families

Working Hours:

Monday: 9 AM–5 PM
Tuesday: 9 AM–5 PM
Wednesday: 9 AM–5 PM
Thursday: 9 AM–5 PM
Friday: Closed
Saturday: Closed
Sunday: Closed

Facility Gallery

Call the Facility

+14252891600

Anxiety Symptoms

Depression Treatment

Signs of Bipolar Disorder

OCD Treatment

Alcohol Addiction

Opioid Addiction

Fentanyl

ADHD Diagnosis

Featured Resources

Help for Loved Ones

Dev

02/11/2026

Help for Loved Ones: Support Without Losing Yourself Caring about someone who’s struggling with alcohol, drugs, or mental health is hard. Clear, practical steps are crucial to start a safe conversation, set kind boundaries, and support treatment without making promises or doing it all alone. Our website is for information only. We help you understand […]