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Quimson Behavioral Health


Adult Mental Health Services

Located in Portland, Oregon.

Tele-health available throughout Oregon. 

Board-Certified in Psychiatry and Forensic Psychiatry

About Section

Seeking Balance

Quimson Behavioral Health provides in-person and tele-health mental health services to patients located throughout Oregon. Our office is located on the westside of Portland, in Bethany Village. We are also close to Beaverton and Hillsboro

We employ a balanced treatment approach which can include medications, education and talk therapy or psychotherapy.

Our current providers include board-certified psychiatrist Pia Quimson-Guevarra, DO and certified physician assistant Cayley Mesterheide PA-C. 


Patient Care

We provide diagnosis and treatment of mental health disorders, including but not limited to: 

  • Generalized Anxiety Disorder (Anxiety)

  • Panic Disorder (Panic Attacks)

  • Social Anxiety Disorder (Social Phobia) 

  • Obsessive Compulsive Disorder (OCD) 

  • Attention Deficit Hyperactivity Disorder (ADHD)

  • Major Depressive Disorder (Depression)

  • Bipolar Disorder

  • Schizoaffective Disorder

  • Schizophrenia


Dr. Pia Quimson-Guevarra also provides psychiatric expert witness services, including forensic consultation and evaluation. 

Clean Bubbles


Monday - Friday

By Appointment Only


15160 NW Laidlaw Road, Suite 240, Portland, OR 97229

Contact Us

For Non-Urgent Issues:

Phone: 503.832.9293

Fax: 503.832.9357

In Event of Medical or Psychiatric Emergency:

Please call 911 or a Crisis Line (see telephone numbers below) or go to the nearest Emergency Room for assistance. 

  • Washington County Crisis Line 503.291.9111

  • Multnomah County Crisis Line 503.988.4888 or 1.800.716.9796

  • Veterans Crisis Line 1.800.273.TALK (8255)

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