Based in Portland, Oregon, Head and Neck Surgical Associates (HNSA) is the Northwest’s most highly specialized medical and surgical practice. With expertise in head and neck, oral, maxillofacial and facial cosmetic surgeries, HNSA is comprised of a unique group of board certified physicians that attended both medical and dental school. Additionally, our doctors have completed trainings in oral and maxillofacial surgery or otolaryngology, as well as relevant specialized fellowship trainings. Leaders in their fields, our physicians are committed to the finest and most thorough care through diagnoses, surgical procedures, and patient care and management.

Our Mission

Our guiding principles are compassion, integrity, and leadership through excellence. Together, we seek to: provide the absolute highest level of patient care, advance the science of medicine and dentistry through research, extend the art of surgery to the next generation through teaching, create a resource for our communities, and cultivate a positive and stimulating environment for our staff.

Please contact us today for a consultation—we look forward to creating a specialized program to fit your needs!


Head and Neck Surgical Associates was founded over 25 years ago on a private practice model by Dr. Dierks and partner. Built upon a union of unique partnerships, HNSA started off with the support and expertise of a University based hospital (OHSU) and community based trauma center (Trauma Services, LLP). We began with the exclusive contract for all head and neck injuries, and provided coverage for all subspecialties of dentistry, oral and maxillofacial surgery, otolaryngology, and plastic surgery. From the beginning, we’ve been dedicated to serving the community through both education and good medicine. Today, we continue our tradition of excellence with our group of compassionate, skilled doctors.

“We were very impressed with how thorough Dr. Cheng was at the consultation. He spent a substantial amount of time answering questions. The entire staff was awesome. On the day of surgery, the clinical staff did a wonderful job of making me feel less stressed about the procedure.” – Mother of Patient Claudia Boyd