O
OR Counselors
Aug 1, 2026
Welcome
Welcome 5 star clinic
QH
PORTLAND
⌂Practice A group practice on Oregon Providers, multiple clinicians under one roof.
✓Verified
Verified practice, confirmed and managed by the clinic itself.
Quimson Behavioral Health
Accepting new clientsThoughtful, comprehensive psychiatry and therapy rooted in cultural understanding and whole-person care
About This Practice
Seeking Balance
Quimson Behavioral Health, LLC provides in-person and tele-health/virtual mental health treatment to patients located throughout Oregon and Washington.
Our office is located on the westside of Portland, in Bethany Village. We are also in close proximity to Beaverton and Hillsboro.
We employ a balanced treatment approach which includes evidence-based medication management, patient education and psychotherapy.
Patient Care
We provide diagnosis and treatment of mental health disorders, including but not limited to:
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Generalized Anxiety Disorder (Anxiety)
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Panic Disorder (Panic Attacks)
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Social Anxiety Disorder (Social Phobia)
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Obsessive Compulsive Disorder (OCD)
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Attention Deficit Hyperactivity Disorder (ADHD)
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Major Depressive Disorder (Depression)
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Bipolar Disorder (Manic Depression)
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Schizoaffective Disorder
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Schizophrenia
Our Providers
- Pia Quimson-Guevarra, DO, Psychiatrist
- Cayley Mesterheide, PA-C, Physician Assistant
We both provide evidence-based medication management and psychoeducation in our 30 minute sessions.
Dr. Quimson-Guevarra can provide combined medication management and therapy or therapy only sessions. These sessions last 60 minutes.
Practice Administrator (1)
Meet the Team (1)
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