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All are welcome!

Professional. Comprehensive. Confidential. Affordable.

Walk-in clinic hours

Ninth and Jefferson Building
908 Jefferson St, 11th Floor
Seattle, WA
Phone: 206-744-3590

  • Monday, 7:30 am to 6:00 pm
  • Tuesday, 9:30 am - 6:00 pm
  • Wednesday, 7:30 am - 7:30 pm
  • Thursday, 7:30 am to 6:00 pm
  • Friday, 7:30 am to 6:00 pm
  • Sat/Sun, closed

No appointment needed. We are a walk-in clinic. We encourage you to call ahead to check on wait times. Interpreters are available.

To be seen more quickly, print and bring the completed Registration Worksheet with you.

You will be seen regardless of your ability to pay. Payment for medical services is based on a sliding fee scale. Non-judgmental!

We can help

If you think you might have symptoms of a sexually transmitted disease (STD), get tested and treated right away. Even if you do not have symptoms, you could have an STD. Come see us and get an STD checkup...and peace of mind.

Get tested and treated.
We provide confidential testing and treatment, and we can answer your questions about HIV and other STDs.

Get evaluated for PrEP.
Pre-Exposure Prophylaxis (PrEP) is a pill that can prevent HIV infection. It's for HIV negative people who are at risk of becoming HIV positive through sexual activity or injecting drugs.

Get help finding HIV care.
All people living with HIV in Washington State can get HIV medical care. We can connect you to the right medical provider.

Learn where else you can be tested.
Select Public Health Centers and community-based organizations that provide HIV and STD testing.

Quotes from our patients

I like that I can get tested and treated in one stop."

Everyone is professional and it seems community driven. I have recommended the clinic to my friends."

I was nervous when I first came in but almost immediately after sitting with the staff all my anxiety went away because they were so easy to talk to."

This office is a safe space for all people including lesbian, gay, bisexual, pansexual, asexual, straight, two-spirit, transgender, cisgender, queer, questioning, ally.

About us

Learn about the dedicated staff of the Sexual Health Clinic at Harborview Medical Center.

Thepthara "Nui" Pholsena

Thepthara "Nui" Pholsena graduated from University of Washington with a Master of Nursing in 2011. Her clinical experience and interests are in chronic diseases, both infectious and non-infectious. For the last three years, she has worked at UW Virology Research Clinic as a research clinician focusing on herpes and vaccine research. She enjoys patient teaching and counseling.

Laura Rishel, Nurse Practitioner

Laura Rishel, MSN, ARNP, is a nurse practitioner at the Sexual Health Clinic at Harborview. Prior to coming to Harborview in January 2018, she worked in primary care at community health clinics in Bellingham and in Maine, where she most enjoyed working in preventive care, sexual and gynecologic health, transgender care and homeless access to health. Her clinical interests include sexual health, transgender care, women's health, and contraception. She is trained in IUD and Nexplanon insertions and removals, and performs these at the Sexual Health Clinic. Laura earned her Master's in Nursing in 2012 from Yale University School of Nursing, and her Bachelor's degrees at the University of Washington. She is certified in both Adult Primary Care and Women's Health.

Susannah Hermann, Nurse Practitioner

Susannah Hermann graduated from the University of Washington Family Nurse Practitioner program in 2001. After a brief stint in family practice she worked in women’s reproductive health for 10 years. Susannah joined the Sexual Health Clinic in 2006. She strives to create a safe space in which all patients feel welcome getting tested, treated, and discussing strategies for reducing risk. She is bilingual in English and Spanish.

Monica Dimick is a physician assistant. Prior to joining the Sexual Health Clinic, Monica worked in primary care and has done bacteriology research as part of her undergraduate and graduate theses. Monica completed her B.S. in Biology from Marietta College in Marietta, OH. She then went on to graduate school for her master’s degree and physician assistant training from Jefferson College of Health Sciences in Roanoke, VA with specific clinical training in infectious diseases.

Sylvan Lowens, Nurse Practitioner

Sylvan Lowens has worked in the Sexual Health Clinic as a clinician and as a research clinician since 1985. Sylvan has worked on studies on Herpes and Herpes Vaccines, Non Gonococcal Urethritis (NGU) causes and treatments.

Dwyn Dithmer, Nurse Practitioner

Dwyn Dithmer, MS, ARNP, is a Board Certified Family Nurse Practitioner. Over the course of her 30 year career, she has worked in the clinic diagnosing and treating sexually transmitted infections. Additionally she recruits and enrolls participants in various STI related studies. She has Masters degrees from both Binghamton University (NY) and Pace University. Her Bachelor's degree is from Georgetown University.

Eduardo Munoz, Nurse Practitioner

Eduardo Munoz is a Physician Assistant who has worked at the Sexual Health Clinic since August 1, 1990.

Negusse Ocbamichael, PA-C, graduated from the University of Washington Medical School, PA program. His clinical experience and interests are in infectious diseases, reproductive and sexual health. For over 28 years, he has worked at the King County Sexual Health Clinic, University of Washington, Virology Research Clinic, HIV Prevention Trials Network and International medicine clinic at Harborview medical center, as a clinician, researcher and administrator. He also served as a Faculty member, speaker and advisory committee member for Seattle STD/HIV prevention and training center.

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