PHELPS & COHEN - Key Persons


Amelia Stoker

Job Titles:
  • Associate Orthodontist
Dr Stoker was born in Salt Lake City, Utah. She received her Bachelor of Science Degree at the University of Utah in Salt Lake City and then moved to Portland, Oregon to complete both her dental degree and orthodontic specialty training at Oregon Health & Science University. During her orthodontic specialty training, Dr Stoker conducted research that was published in the American Journal of Orthodontics and Dentofacial Orthopedics. She is Board Certified and a Diplomate of the American Board of Orthodontics.

Dr. Eric Phelps

Dr. Eric Phelps is a proud graduate of Leigh High School in San Jose. He was blessed with an engineering education at Cal Poly, San Luis Obispo, and, after graduating summa cum laude, he had the honor of attending the UCLA School of Dentistry as a UC Regent Scholar. Dr. Phelps earned a Master's Degree in Oral Biology with an emphasis on bone cell research while concurrently earning his Doctor of Dental Surgery degree. He then completed the UCLA Orthodontic Residency while furthering his Master's Degree research. Dr. Phelps has thousands of hours of continuing education, training, and study with an emphasis on craniofacial development, temporomandibular disorders, chronic facial pain, airway obstruction, and sleep-related breathing disorders. Dr. Phelps and his wife Suzanne enjoy visiting the Central Coast (SLO and Pismo Beach) to relax by the ocean and visit their boy/girl twins who are students at Cal Poly. The Phelps family are passionate about supporting FIRST (Foundation for Ichthyosis and Related Skin Types) after the loss of their son, Dane Christian, in 2008, to a novel form of ichthyosis.

Dr. Jason Cohen

Dr. Jason Cohen was raised in Princeton, New Jersey and graduated summa cum laude with a Bachelor of Science in mechanical engineering from Tufts University. After working as a software engineer, he traveled to California to attend dental school at the University of California Los Angeles. He received his orthodontic specialty training at the University of California San Francisco. Dr. Cohen is a published author on topics relating to digital radiography and early detection of disease through computer modeling of trabecular bone. His most recent publication appeared in the August 2005 edition of the American Journal of Orthodontics. Dr. Cohen is an avid sports fan and a former collegiate tennis player. He spends his free time exercising, playing golf and tennis, and relaxing with his family.

Dr. Puja Patel

Job Titles:
  • Associate Orthodontist
Dr. Puja Patel was born in India and grew up in Tampa, Florida. She went on to become a Gator, studying Microbiology and Chemistry at the University of Florida during its prime years in both football and basketball. Go Gators! She then traveled across country to obtain her dental degree at the University of California, Los Angeles and back across to Pennsylvania for additional clinical training in a General Practice Residency at the Philadelphia VA Medical Center. Dr. Patel practiced general dentistry for four years on the east coast, during which she developed interest in performing orthodontic treatment. In order to offer her patients the highest quality of care, Dr. Patel returned to school for orthodontic specialty training at the Oregon Health and Science University in Portland, Oregon. Her masters research compared changes in tooth angulation during treatment with braces versus Invisalign clear aligners. Dr. Patel is Board Certified and a Diplomate of the American Board of Orthodontics.

Joy Chang

Job Titles:
  • Associate Orthodontist
Dr. Chang was born in Walnut Creek and spent her childhood growing up in Hong Kong and Taiwan. She graduated from the Johns Hopkins Whiting School of Engineering with a B.S. in Chemical and Biomolecular Engineering and completed a 1-year program at the National Institutes of Health under the Cancer Research Training Award, where her research on synthetic biology was published in Science and in Genetics. Transitioning from her work in chemical engineering, Dr. Chang obtained her Doctor of Dental Surgery degree from the University of California, San Francisco (UCSF) and her specialty training Orthodontics and Master's Degree in Dental Sciences at the University of Connecticut. During her residency, Dr. Chang is the recipient of several prestigious awards from the American Association of Orthodontist Foundation and Northeastern Society of Orthodontist for her extensive research on acceleration in orthodontic tooth movement. Dr. Chang has also received the Harry Sicher award and presented at the American Association of Orthodontists (AAO) in 2019. She is also Board Certified and a Diplomate of the American Board of Orthodontics

Stephanie Tsang

Job Titles:
  • Dental Assistant
  • Associate Orthodontist
Stephanie is a licensed Dental Assistant with a specialty in orthodontics. She first began in the orthodontic field in 2015. She loves everything about ortho, from making children feel at ease and loving the dentist to watching teenagers and adults become happier and confident with their smile! Dr. Tsang is a Bay Area native who grew up in Los Gatos, CA where she attended Saratoga High School (Go Falcons!). After high school, Dr. Tsang was selected for the accelerated pre-dental program at the University of the Pacific. There, she graduated Magna Cum Laude with a Bachelor of Science degree in Biological Sciences. Subsequently, she pursued her Doctor of Dental Surgery degree from University of the Pacific, Dugoni School of Dentistry in San Francisco, graduating with high honors. Despite having spent her entire life in California, Dr. Tsang decided to seek a change in scenery and embarked on a journey to the Rocky Mountains. She enrolled in the Orthodontics specialty training program at the University of Colorado, where she earned her Master's Degree. Her research during this time focused on the utilization of various anesthetic types for mini-implant placement, contributing valuable insights to the field.

Thomas Nguyen

Job Titles:
  • Technician

Van Tran

Job Titles:
  • Associate Orthodontist
Dr. Tran was born in Vietnam and immigrated to southern California when she was in grade school. Her family relocated to Colorado during her high school years and she received her Bachelor of Science Degree at the University of Colorado at Denver. Dr. Tran decided to venture out and chose to attend University of Nevada Las Vegas for her dental degree. While at UNLV, Dr. Tran conducted research that was published in the Journal of Cancer Science & Therapy. She returned to Colorado for her Orthodontic specialty training at the University of Colorado and received her Master's Degree with research on the investigation of polymeric orthodontic aligners.