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

  • Post-traumatic Stress Disorder (PTSD)

  • 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

1975 NW 167th PL, Suite 100-20

Beaverton, OR 97006

Tuesdays and Thursdays

By Appointment Only

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)

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The content at Quimson Behavioral Health’s website, including its’ blog and social media accounts, is for informational purposes only. Information is gathered and shared from reputable sources; however, Quimson Behavioral Health is not responsible for errors or omissions in reporting or explanation. No individuals, including those who are under Quimson Behavioral Health’s care, should use the information contained within for self-diagnosis or self-treat of any mental health or medical condition. This information should not be a substitute for your provider’s care or advice. 


As a reader, you have not entered a patient-physician relationship with me.  Therefore, I ask that you not ask me for medical advice, either in the comments or by email. I may delete such comments and accept no responsibility to respond to unsolicited email.


If you are experiencing a medical or psychiatric emergency, please call 911 or go to your nearest emergency room.