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quimson behavioral health adult forensic psychiatry oregon washington

Quimson Behavioral Health

Psychiatric care that sees you. 

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Thoughtful medication management and psychotherapy for adults in Oregon and Washington. Telehealth statewide, with in-person appointments in Portland. 

quimson behavioral health

A culturally responsive practice led by Dr. Pia Quimson-Guevarra, a Filipina-American/AAPI psychiatrist.

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About Section

Seeking Balance

Quimson Behavioral Health, LLC provides

comprehensive psychiatry and therapy rooted in cultural understanding and whole-person care. 

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Our office provides in-person and telehealth/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. 

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inclusive BIPOC LGBTQ all are welcome
Balance
mental health treatment anxiety depression ADHD

Patient Care

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

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  • 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​

 

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Our Current Providers​​​​​

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Pia Quimson-Guevarra is an AAPI and BIPOC psychiatrist. Provides mental health treatment to Oregon and Washington Patients. Asian. Filipino. Quimson Behavioral Health

Owner and Psychiatrist

Cayley Mesterheide- Physician Assistant. Provides mental health treatment to Oregon and Washington patients. Quimson Behavioral Health

Physician Assistant 

We both provide evidence-based medication management and psychoeducation in our 30 minute sessions.

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Dr. Quimson-Guevarra can provide combined medication management and therapy or therapy only sessions. These sessions last 60 minutes. 

Clean Bubbles

HOURS

Monday-Friday

By Appointment Only

OUR LOCATION

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

Contact Us

For Non-Urgent Issues:

Phone: 503.832.9293

Fax: 503.832.9357

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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. 

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Oregon

  • Washington County Crisis Line 503.291.9111

  • Multnomah County Crisis Line 503.988.4888 or 1.800.716.9796

  • Clackamas County Crisis Line                   503-655-8585

  • ​List for Oregon Counties

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Washington

  • King County Crisis Line                                  1-866-427-4747

  • Clark, Skamania, Klicitat County Crisis Line 1-800-626-8137

  • List for Washington Counties 

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Nationwide

  • Veterans Crisis Line 1.800.273.TALK (8255)

"I've been seeing Dr. Q for years and she's made such a huge impact on my mental health. Being able to do talk therapy and medication with the same provider has been a game changer and I've made so much progress. She understands what I need from therapy and has a lot of good ideas. I have been in therapy on and off for over a decade, and some therapists make me feel like I have already heard it all. But with Dr. Quimson I look forward to our visits and always come away feeling more centered. She has uncovered some diagnosis that other doctors missed and is now helping me treat issues that I didn't even realize were impacting me so much. She is compassionate and understanding, but challenges me when I need it, which I appreciate. I've tried different medications under her care, but never felt pressure to explore an option I wasn't interested in - she never suggests a medication unless we talk through the situation and other options first. Her colleague Jamie who does scheduling is also very easy to work with. You can reach out to them via text messaging, which makes it so much easier for me to reschedule appointments and get refills. Overall, Dr. Quimson has made a huge impact on my life because she provides high quality care, and it is a bonus that her office is very easy to work with."
"This was my first time working with a psychiatrist, and I have been more than satisfied. Dr. Quimson-Guevarra is responsive and takes the time to understand your individual situation. I appreciate regular check-ins and easy ways to reach out when needed. I definitely would recommend!"

ADDITIONAL SERVICES

Dr. Pia Quimson-Guevarra also provides psychiatric expert witness services, including forensic consultation and evaluation for lawyers, law firms, and organizations. 

Judge

© 2026 by Quimson Behavioral Health                

 

Disclaimer:

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.

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