Meet Our Staff

Clive M. Liu, MD, PLLC, FABD

Dr. Liu is a board-certified dermatologist specializing in all disorders of the skin, with primary clinical and research interests in psoriasis, eczema, and skin cancer. He earned his medical degree from the New York University School of Medicine. He completed his internship in Internal Medicine at Tulane University School of Medicine in New Orleans, followed by a clinical research fellowship in psoriasis at University of California, San Francisco. Next, he finished a dermatology residency at University of Utah, where he was honored as Chief Resident in 2002. After residency, he became a faculty member at the University of Utah's Department of Dermatology and performed further research into gene expression in psoriasis. In 2004, he and his wife moved to Seattle, a decision that they are very happy to have made. Dr. Liu is currently a member of the adjunct faculty at University of Washington's Division of Dermatology. He is a national speaker and key opinion leader in psoriasis. He has been the honorary medical director of the National Psoriasis Foundation Walk and is a member of its President Circle. He also volunteers as an attending dermatologist at the Veteran Affairs Medical Center. Since joining the staff at Bellevue Dermatology, in addition to serving the community's general medical dermatologic needs, he has establish an acclaimed center for the research and treatment of psoriasis and other inflammatory skin conditions.

In his own words: The field of dermatology is ever changing. With the increasing challenges in the medical world and the proliferation of cosmetic services, I believe there is a shortage of physicians who specialize in the treatment of skin disorders. As your medical dermatologist, I will strive to offer you the best and most comprehensive care for you and your family.


Tien V. Nguyen, MD

Dr. Nguyen grew up in Vietnam, and has lived and worked in many places across the US. He obtained his undergraduate degree from Brown University in Providence, RI, and obtained his Doctorate in Medicine from the University of Texas Health Science Center in San Antonio,TX. During medical school, he worked as a clinical research associate at the Department of Dermatology, University of California, San Francisco (UCSF), where he learned from treatment experts and developed clinical research skills to advance therapy for psoriasis, atopic dermatitis, and hidradenitis suppurativa. He completed a 1-year internship in Internal Medicine at California Pacific Medical Center in San Francisco, CA, and a dermatology residency at the University of Colorado in Aurora, CO. He spent the first 2 years of dermatology residency at the University of New Mexico in Albuquerque, NM.

His interests outside of work vary from music to physical fitness to food. Dr. Nguyen would describe himself as a foodie and enjoys restaurant recommendations as well as recipes for home-prepared meals. He speaks Vietnamese, French, some Swedish, and enjoys traveling immensely. It is one of his primary career goals to treat all of his patients with the utmost respect while providing the best care possible when it comes to their skin-related needs. He is very passionate about caring for patients with all types of skin conditions, but has a weakness for chronic debilitating inflammatory skin conditions, including hidradenitis suppurativa, pyoderma gangrenosum, moderate-to-severe psoriasis vulgaris and atopic dermatitis/eczema. He has developed an interest in transgender dermatology and is proud to serve the LGBTQ and non-binary community. In addition to attending his clinics at Bellevue Dermatology Clinic, Dr. Nguyen also staffs a dermatology clinic for homeless and marginalized populations associated with the University of Washington School of Medicine. Dr. Nguyen’s philosophy toward patient care and medicine may be best captured by one of his favorite quotes by Muhammad Ali: “Service to others is the rent you pay for your room here on earth.”


John S. Walsh, MD

A Bellevue native, Dr. John Walsh received his Bachelor of Science and Doctorate of Medicine degrees from the University of Washington. He then went on to complete his dermatology residency training at the Medical College of Wisconsin and his dermatopathology fellowship at the University of Colorado. During his professional career, he served as Assistant Professor of Dermatology and Head of Dermatopathology at the Mayo Clinic in Jacksonville, Florida. After being away for over thirteen years, Dr. Walsh and his family are excited to return to their beloved home, the Pacific Northwest. In addition to attending to patients at Bellevue Dermatology Clinic, Dr. Walsh also practices dermatopathology at Dermatopathology Northwest. He enjoys seeing patients with a variety of dermatologic conditions. Additionally, as a board certified dermatologist and dermatopathologist, he is experienced in diagnosing dermatologic disorders both in the clinic and under the microscope. Outside of work, Dr. Walsh enjoys spending time with his wife and three children.


Lawrence Gogenola, MD

A native of the Pacific Northwest, Dr. Gogenola graduated from the University of Washington School of Medicine and was board-certified in dermatology in 1987. He has been practicing dermatology in Bellevue since 1988. Dr. Gogenola's special interests include the treatment and prevention of skin cancer, cosmetic dermatology, and the treatment of acne. He is also an avid skier and enjoys physical fitness and conditioning.

Susan Duffy, PA-C

Although Susan Duffy was born in Brooklyn, NY, she has spent most of her life in the Pacific Northwest.  She obtained her undergraduate degree from Washington State University and earned her Doctorate in Chiropractic with honors from Western States College in Portland, OR.  Adding to this impressive resume is her degree in Physician Assistant in Clinical Health Science from the University of Washington School of Medicine.  She has practiced as a physician assistant for many years, first in family medicine, and then joined the field of dermatology in 2000.  She has worked closely with her physician mentors and continues to do so in order to provide the best care in both medical and cosmetic dermatology, including but not limited to skin cancer screening, acne, rosacea, psoriasis, and eczema.  She is experienced and quite comfortable with performing minor skin surgeries and minimally invasive cosmetic procedures.  She has been with Bellevue Dermatology Clinic since 2018 and thoroughly enjoys the opportunity to serve this community.  Outside of work, she enjoys spending time with her children and her pet, an adorable Labra-doodle (feel free to ask for photos).  Susan’s other hobbies include gardening and hiking.  Her philosophy of care aligns with that of Bellevue Dermatology Clinic: to provide excellent dermatologic care to our patients, and to treat everyone with utmost respect.  Please call our office to see Susan today!


Lightbox Therapy Staff

Gina Madson, Tara Pollock , Linda Alderfer