Assessment and Treatment Associates

Snohomish County

Assessment and Treatment Associates logo

21907 64th Avenue West, Suite 310, Mountlake Terrace, WA 98043, USA


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Serving Washington state with offices inBellevue,  Mountlake Terrace, and Pasco.

As a leading provider of comprehensive substance abuse and mental health services in the Northwest, our compassionate staff is committed to providing the highest quality individualized care.

The manifestation and development of alcohol and drug problems involve a complex combination of biological, psychological, and sociological factors that are unique to each individual. Successful change or recovery begins with a comprehensive drug and alcohol assessment by our highly qualified counselors, and treatment is dependent on a person’s commitment to an individualized program that considers both their strengths and needs.

At Assessment & Treatment Associates (ATA) we understand the benefit of an integrated approach to healing and that is why we offer mental health counseling and general wellness services as part of our addiction treatment programs.  Substance abuse problems affect not just the individual but the whole family so as part of our program we provide education and offer family counseling.

Assessment and Treatment Associates is proud to partner with Schick Shadel Hospital.  Schick Shadel has treated addiction for 80 years using our highly effective, multi-modal medical model that addresses  both psychological and physiological aspects of addiction. Learn more.

Serving patients in the following Washington communities: Seattle, Bellevue, Everett, Auburn, Bothell, Des Moines, Edmonds, Federal Way, Issaquah, Kent, Kirkland, Lakewood, Lynnwood, Marysville, Mountlake Terrace, Mercer Island, Redmond, Renton, SeaTac, Olympia, Bremerton, Bainbridge Island, Poulsbo, Kennewick, Pasco, Richland, Tri-Cities, Yakima, Sunnyside.

Assessment & Treatment Associates is a preferred provider for the following insurance plans.

Serving Washington state with offices inBellevue,  Mountlake Terrace, and Pasco.


Primary Focus of the Provider

  • Substance Abuse Treatment Services

Type of Care

  • Substance abuse treatment
  • Accepts clients on opioid medication

Facility Type


Treatment Approaches

  • Cognitive/behavioral therapy
  • Substance abuse counseling approach

Facility Smoking Policy

  • Smoking permitted in designated area

Service Setting (e.g., Outpatient, Residential, etc.)

  • Outpatient
  • Intensive outpatient treatment
  • Regular outpatient treatment

Facility Operation (e.g. Private, Public)

  • Private organization
  • State substance abuse agency
  • State mental health department
  • State department of health

Payment/Insurance Accepted

  • Cash or self-payment
  • Private health insurance

Emergency Mental Health Services


Payment Assistance Available


Language Services


Special Programs/Groups Offered


Ancillary Services

  • Individual counseling offered
  • Group counseling offered
  • 12-step faciltitation approach
  • Brief intervention approach
  • Motivational interviewing
  • Relapse prevention

Age Groups Accepted

  • Young adults
  • Adults

Gender Accepted

  • Female
  • Male

Exclusive Services


  • Assessment and Treatment Associates

    21907 64th Avenue West, Suite 310, Mountlake Terrace, WA 98043