Who we are.

/Who we are.
Who we are. 2016-12-14T18:54:27+00:00

Evonne Serpa, Au.D. | Doctor of Audiology


Dr. Evonne Serpa is an Audiologist who has lived and worked in the Portland area for the last 20 years. Finding a need in the local community for more comprehensive audiology services that include both adults and children, Dr. Serpa purchased Hearing Resources Audiology Center. She is passionate about treating and educating her patients on how best to protect and enhance their hearing health and quality of life. Her goal as an audiologist is to build trust and long-term relationships with her patients in a relaxed, non-threatening environment. She wants all of her patients to feel comfortable with their hearing care provider and to become someone they trust to help them. “My favorite part of my job is helping people hear better; watching their eyes light up, and seeing their confidence return. Helping them connect better with family and friends gives me great satisfaction.”

Education and Experience

Dr. Serpa completed a Bachelor of Science in Speech and Hearing Sciences from Central Michigan University in 1994, and a Master of Science in Speech and Hearing Sciences from Portland State University in 1998. She completed her Doctor of Audiology degree from University of Florida in 2010. She has worked with patients in a variety of settings, from hospitals to private practices and educational clinics. Most recently, Dr. Serpa served as an Assistant Professor at Pacific University School of Audiology. She is also past president of the Oregon Academy of Audiology, an Academy of Audiology fellow, and continues to be actively involved in the Oregon audiology community.

The Personal Side

Dr. Serpa was born and raised in the Detroit area, and moved to the Northwest in 1995. She and her husband, Mike, love Oregon and now call it their forever home. She is a huge fan of the Detroit Tigers, Red Wings and Detroit Lions, and feels deep in her heart that the Lions will win the Super Bowl in her lifetime. Dr. Serpa loves Halloween, purple is her favorite color, and when she’s out of the office, enjoys camping with her family, being a hockey mom, and homeschooling her children.

Anna-Liisa Yahn | Patient Advocate, Office Manager


Anna-Liisa Yahn is the friendly face and voice of Hearing Resources Audiology Center. With more than ten years experience working in patient medical access coordination, Anna-Liisa has spent the majority of her professional time assisting patients and their families with navigating the healthcare system and accessing appropriate care efficiently and compassionately. She prides herself on being able to find creative options for funding and access to resources for people, helping them live their lives more fully.


What makes Ms. Yahn’s expertise unique is her past experience working on the insurance company side of the industry, working for a Medicaid health plan. She is most proud of making the transition from decision-making to applying her insurance industry experience to direct patient care. She derives the most satisfaction on the job from helping her patients access and maximize their insurance benefits.

As Office Manager and Patient Access Coordinator, Anna-Liisa assists Hearing Resources patients with scheduling, follow-ups, benefits coordination, patient education and information sharing, and answering questions - from billing to explanation of benefits to what kind of battery they need for their hearing devices. Her friendly and open-hearted manner help create the warm, inviting clinic you experience when you walk through our doors.

The Personal Side

Anna-Liisa originally hails from California, but has called Oregon home for the last 12 years. She is a baker, hiker, board game winner, and a soccer, rugby, judo and choir mom to four. Her favorite food is ice cream, and would happily help you taste test.

Hearing Aids Portland

Dr. Evonne Serpa, Au.D.
Hearing Resources Audiology Center
4311 NE Tillamook St. Portland, OR 97213
Phone: 503-774-3668