Meet Our Endodontists
Covington & Federal Way
 Dr. Christopher Maguire-Adams
D.M.D.
Dr. Christopher Maguire-Adams graduated Magna Cum Laude from Temple University’s Kornberg School of Dentistry in 2013. He completed his residency at Temple University as Chief Resident in 2015. Research compiled during his residency went on to be presented at the annual American Association of Endodontics. After school he returned to the Pacific Northwest with his family in 2015. He is the father of two young children, Abigail and Porter. His wife, Tiffany, is an Issaquah local and the daughter of Dr. Andrew Johnson, DDS. Though he was raised all over the east coast he and his family decided to put down roots here in the Puget Sound area.
In 2017 Dr. Maguire-Adams took over his father-in-law’s practice, Johnson Endodontics, and Peak Endodontics was established. His time is split between our two Peak Endodontics locations. One day a week he works at the University of Washington as an Affiliate Associate Faculty member teaching predoctoral student endodontics. For the past three years he’s volunteered at Seattle King County Clinic performing procedures at no cost for the local underserved and at-risk population. It is a program he takes great pride in.
He works hard to further his education and stay up to date in the latest and greatest of endodontic technology. Currently, he is the president of John Smith Study Club and attends two other study clubs. He is also a member of the American Association of Endodontics (AAE).
Dr. Maguire-Adams considers patient care to be of the utmost importance. At Peak Endodontics we do our best to see patients as quickly as possible and while with us to receive the highest level of care. He looks forward to this new start in the Pacific Northwest and growing and expanding Peak Endodontics.
Go Mariners.
Unfortunately, Dr. Adams is not clinically seeing patients any longer.
Healthgrades Profile
 Dr. Shoaib Siddiqui
M.S.D.
Dr. Siddiqui comes from a diverse background. Born and brought up in Dubai, he received his dental degree from Pakistan in the year 2000. He then moved on to pursue his Masters in Restorative Dentistry (MDSc) from England, UK in 2006. He has taught in dental programs as an Assistant Professor in Pakistan and in Saudi Arabia. In 2017, Dr. Siddiqui moved to the USA with his family to pursue his specialty training in Endodontics (Specialty Certificate and MSD) and completed his training in 2019 from University of Louisville, Kentucky. Since then, he has been working as a full time Endodontist in the State of Washington. He is an international speaker who has shared his experience in various countries around the world showing his passion for Endodontics and its teaching. He is a member of the American Association of Endodontists. Dr. Siddiqui is married to Dr. Wardah with 3 beautiful daughters. He enjoys hiking trails, socializing, and loves playing the guitar. He has a local underground rock band too.
 Dr. Andrew Johnson
D.D.S.
Dr. Andrew Johnson attended the University of Nebraska, Medical Center, College of Dentistry in Lincoln, Nebraska from 1986-1990. In August of 1990 he began his specialty training in Endodontics at the University of Illinois in Chicago. He received his Endodontic degree in May 1992. In July of 1992 he opened his Endodontic practice, Andrew M. Johnson DDS Endodontics, in Renton, Washington.
He has kept his skills up to date by completing many continuing education courses each year throughout his career. He attends a number of study clubs, specifically John Smith and South Shore. He is a member of the American Association of Endodontics, American Dental Association and has applied to the American Board of Endodontics. Dr. Johnson is an Endodontist who enjoys educating his patients as well as treating them.
His most satisfying aspect of the practice is treating and caring for his patients. He likes to put himself in the patient’s position and treat them as he would himself, which is how he conducts all aspects of his practice. Making all patients comfortable, getting them out of pain and creating lifelong relationships is his goal for his practice.
Dr. Johnson is married with three children and two grandchildren. His son in law, Dr. Maguire-Adams, recently took over the practice and Peak Endodontics was established. His hobbies include golf and basketball.
He is thankful for his practice over the years and excited to expand and develop great relationships with many patients and doctors in the Renton/Bellevue area.
Healthgrades Profile
 Dr. Hooman Rabiee
D.D.S., M.S.
Dr. Rabiee completed his pre-doctoral and doctoral studies from the University of Leuven, Belgium, where he obtained his Doctor of Dental Surgery degree in 1994. After graduation from dental school, Dr. Rabiee completed several academic courses in orthodontics, implantology and cosmetic dentistry. He was in private practice as a comprehensive general dentist in both Belgium and the United Kingdom for twenty-one years. His passion for Endodontics led him to leave private practice and to pursue a 3-year program at the University of Michigan School of Dentistry, where he earned a Master of Science in Endodontics with Honors.
Dr. Rabiee is an experienced endodontist with proven success in delivering exceptional patient care and achieving optimal treatment outcomes. Skilled in performing root canal therapy utilizing advanced technology for accurate diagnosis and treatment planning. A collaborative team player who values open communication and values-driven dental practices. Fluent in English, Dutch and Persian, ensuring effective communication with diverse patient populations. Highly detail-oriented and empathethic, focused on providing compassionate care that improves not only oral health but overall well-being. Most proud of of consistently positive patient outcomes, efficient collaboration, and earning patient trust and satisfaction. Dr. Rabiee is a professional member of various dental organizations, including the American Association of Endodontics, Internatoonal Association of Dental Traumatology and European Society of Endodontology. Outside the office, he loves spending time with his wife and their two children. His hobbies include cooking, traveling, soccer and skiing.
 Dr. James Cheng-I Lin
D.D.S.
Dr. James Cheng-I Lin attended both Taipei Medical University in Taiwan and Hiroshima University in Japan. After obtaining his DDS degree in 2009 he joined the Taiwanese Navy and served as a dental officer. Upon honorable discharge, he furthered his clinical training in both general practice and endodontic residencies at TMU medical center. Dr. Lin then came to the USA and received his endodontic certificate from Columbia University in the city of New York in 2014. After practicing at a private practice In Houston, Texas for 4 years, Dr. Lin moved to the Pacific Northwest in 2018.
Dr. Lin has lectured internationally on the topics of dental education in endodontics. He is an active member of American Association of Endodontists, American Dental Association and Washington State dental association. He continuously advancing his techniques and education by attending various of educational courses.
Dr. Lin makes sure all his patients are provided with the highest standard of care. He believes that all treatments should be done in a painless and efficient fashion. Patients’ wellbeing and satisfaction is his number one priority.
 Dr. Hsuan Hsia
D.D.S.
I am passionate about helping patients keep their natural teeth for life. As an endodontist, my focus is on relieving pain, saving teeth, and making every visit as comfortable as possible.
I was born in Taiwan and raised in Canada, which gave me a unique appreciation for connecting with people from diverse backgrounds. I earned my Doctor of Dental Surgery (DDS) degree from the University of Michigan School of Dentistry in 2015, and later completed my specialty training in endodontics at the University of Detroit Mercy in 2024. During residency, I was honored with the Goodman Award for Clinical Excellence and Professional Integrity, a recognition that reflects my dedication to providing the highest quality of care with compassion and professionalism.
My patients often tell me they value my gentle approach, clear communication, and commitment to using the latest technology to achieve the best possible results.
Outside of dentistry, I enjoy spending time with my family, watching good movies, traveling, and hiking. These experiences keep me balanced and energized, and I bring that same passion for life into the care I provide every day.
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