O
OR Counselors
Aug 1, 2026
Welcome
Welcome 5 star clinic
Quimson Behavioral Health
A group practice on Oregon Providers, multiple clinicians under one roof. Verified practice, confirmed and managed by the clinic itself. Offers secure video sessions across Oregon. This practice offers medication management and psychiatric prescribing. Accepting new clients
Thoughtful, 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:
-
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 (Manic Depression)
-
Schizoaffective Disorder
-
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.
Medication management
This practice has psychiatric nurse practitioners or psychiatrists on staff who provide medication management.
Practice administrator (1)
Meet the team (1)
Specialties
Treatment approaches
Languages and ages
Languages spoken
Ages we work with
Photo gallery (1)
Featured video
Reviews
5.0
1 review
5
1
4
0
3
0
2
0
1
0
Share your experience
Reviews are moderated before publishing. Please be honest and respectful.
Check your email! We sent a verification link to confirm your review. It will appear after email verification and moderator approval.
Contact
Messages go to the practice inbox, and your email is never shown publicly.