Biography & Education


Growing up working in her father’s family medicine clinic, Marissa Moritz-Guzik, PA-C, knew early on that she wanted to follow in his footsteps as a health care provider. 

“Seeing the relationships he developed and the preventive care he provided inspired me,” she said. “My most important role as a member of a health care team is to establish a mutual understanding through communication and education.” 

After earning her bachelor’s degree in kinesiology and master’s degree in integrative physiology from the University of Colorado, Marissa moved to Oregon to attend Pacific University for her training as a physician assistant.

Marissa loves Portland, as do her husband, two dogs and three chickens. Her hobbies include cooking, camping, running and spending time with family and friends.

Areas of expertise

Family medicine


Bachelor of Arts, Kinesiology: University of Colorado at Boulder

Master of Science, Integrative Physiology: University of Colorado at Boulder

Master of Science, Phyician Assistant Studies: Pacific University, Hillsboro, Ore.

  • English

Care Locations

16180 SE Sunnyside Road, Suite 102
Happy Valley , OR 97015
Fax 503-582-4999


Board Certifications
  • General practice
  • Physician assistant


Patient Ratings and Comments
About Our Survey

The Patient Rating score is based on responses given during the CAHPS Patient Experience Survey. Responses are measured on a 10-point scale, with 10 being the best score. These scores are then translated to a 5-point scale in order to display results in a 5-star rating. Comments are also gathered from the same survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing the comments.

4.7 out of 5 (67 Ratings, 16 Comments)


I usually see my main PCP Dr. [...], Marissa was a great person to step in for her. I was very comfortable seeing her.
Providence Health & Services Patient

The provider has always given me great care. Dealt with her at the facility before Sunnyside and moved doctor's to continue in her care.
Providence Health & Services Patient

PA Marissa appears to remember my previous visits better than I do [...]. And she gives very good care. She's great at her job.
Providence Health & Services Patient

I was not pressured to take services that I did not want
Providence Health & Services Patient

I don't have no problems with the assistance its the regular dr I don't like
Providence Health & Services Patient

I never had a bad experience, they treated me very well at all of my appointments.
Providence Health & Services Patient

This PA was very comprehensive and was very easy to communicate with.
Providence Health & Services Patient

Marissa listened carefully to my health concerns and then discussed the options with me so that I could feel a part of the process of deciding how to take care of my needs.
Providence Health & Services Patient

I was very pleased with the help and care I received from Marissa Moritz-Guzik.
Providence Health & Services Patient

I was well taken care of in a pleasant atmosphere.
Providence Health & Services Patient

This was my first visit, as I'm establishing care with a new PCP. I was pleased with the provider because she listened, addressed questions, and she was easy to talk to and relate with.
Providence Health & Services Patient

Marisa is a caring, conscientious, encouraging, brilliant PA. She listened carefully and was most sympathetic to all my concerns. Plus she has a wonderful sense of humor. I would entrust my health care to her without a doubt. Thanks to her for putting this patient at ease.
Providence Health & Services Patient

she was amazingly friendly and helpful
Providence Health & Services Patient

I came in for a suspicious spot on my [...], but was suffering badly from [...] that day (my husband drove me in). My provider had seen me for [...] before and was very careful with me. She referred me to a dermatologist for the spot and to an ENT for the [...]. I was very grateful for the care she took with me.
Providence Health & Services Patient

Good experiences
Providence Health & Services Patient

I was surprised that she took the time to look at my history
Providence Health & Services Patient