Quimson Behavioral Health is a private psychiatric practice located in the Portland metro area, in Beaverton, Oregon. 

Dr. Pia Quimson-Guevarra is a

Doctor of Osteopathic Medicine (D.O.),

which holds the same rights and

responsibilities as Doctor of Medicine (MD).

Both types of doctors have the same medical education

and medical training.

Dr. Pia Quimson-Guevarra completed her psychiatric

training at Oregon Health and Science University (OHSU),

which is a MD training program.


She is board-certified in psychiatry

and forensic psychiatry. 


Patient Care

Dr. Pia Quimson-Guevarra provides diagnosis and treatment of mental health disorders, including but not limited to:

  • Generalized Anxiety Disorder

  • Panic Disorder

  • Social Anxiety Disorder

  • Obsessive Compulsive Disorder

  • Attention Deficit Hyperactivity Disorder (ADHD)

  • Major Depressive Disorder (Depression)

  • Bipolar Disorder

  • Schizoaffective Disorder

  • Schizophrenia

Dr. Pia Quimson-Guevarra employs a balanced treatment approach which can include medications, education, and talk therapy.


While she treats a variety of mental health conditions, she specializes in anxiety and depression. She also help others explore the impact of culture on their mental health.


Dr. Pia Quimson-Guevarra writes a blog on mental health issues. 

Psychiatric Expert Witness

Dr. Pia Quimson-Guevarra also provides psychiatric expert witness services, including forensic consultation and evaluation. Click here for more informaiton. 

Medication Management
Psychiatric Expert Witness


About Me
For New Patients
For Current Patients

Tuesdays and Thursdays

By Appointment Only


1975 NW 167th PL, Suite 100-20

Beaverton, OR 97006

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

Washington County Crisis Line  503-291-9111

Multnomah County Crisis Line  503-988-4888 or 1-800-716-9769

Veteran Crisis Line  1-800-273-TALK (8255)


Nothing on this website should be construed as legal advice. I am not licensed to practice law in any state and am not an attorney.  I am not a disclosed Expert Witness or Forensic Psychiatric Consultant in a legal matter until there exists a signed Retention Contract. No attorney-client privilege exists as a retained Consultant.  I welcome a call from attorneys, employers, government administrative bodies or others requiring forensic services, to discuss your case to determine if my experience and credentials are appropriate to the case. I do not work directly with individuals representing themselves in a legal matter.