Meet the Doctors

Meet the Doctors

Dr. Fay Mansouri

Dr. Mansouri graduated dental school as an academic giant. Not only did she graduate at the top 5% of her class, her national dental board exam scores were in the top 3% of the nation. After practicing as a general dentist for four years, Dr. Mansouri was ready to pursuit her...

Dr. Jason Cho 

Dr. Cho earned a Bachelors of Arts Degree, with commemoration, in Biophysics from John Hopkins University, a world leader in research and education. He earned a degree in dental medicine at UCLA and continued at the prestigious University of Pennsylvania earning a Certificate in Endodontics.

Meet The Doctor

Dr. Jimmy Pham

Dr. Jimmy Pham was born and raised in Southern California. He attended the University of California, Irvine, and received a Bachelor of Science in Biology. Dr. Pham received his D.D.S. degree at the University of Southern California. He earned his Endodontics Specialty by completing 2 years of advanced training at Boston University with honors.

Meet Our Staff


Thao is the new friendly face here at Irvine Endodontics. She is a part of our front office, back office, and marketing team. Her passion for dentistry is what drives her as she loves giving patients the best professional care possible. Thao received her B.S. in Public Health Science from the University of California, Irvine and since had extensive experience with patient care. Thao was involved in neurocritical researches at her university, patient relations at UCI Medical Center, and participated in several Be The Match: The National Marrow Donor drives. She hopes to become a dentist in the future in order to bring confident smiles to everybody.

In her spare time, you can almost always find her at a local Starbucks or library studying for her entrance exams and classes or trying to be Instagram famous (you know, in case Dentistry doesn’t work out). Her other hobbies include cooking, working out, and exploring the next big eateries around town with her significant other.


Bill has been in the dental field since 2004. He began his career as a graphic designer, since then he has held several positions within a dental office, and has been an office manager for the last ten years. His experience in patient care, insurance, and customer service is an asset to our office. His passion for helping patients shows in his willingness to go above and beyond.

He lives in Lake Forest. During his spare time, he enjoys spending time with his twins going to the park or the movies or just playing games.

He is available during office hours to help or answer any questions or concerns you may have. Consider him your personal concierge at Irvine Endodontics.


Mike Nguyen is our Lead Assistant. He received his certification locally, but is originally from the East coast. His extensive training and experience assisting specialist dentists makes him a tremendous addition to the Irvine Endodontics team. As a team lead, he ensures that all of our dental assisting staff are trained and ready to assist. He also oversees that all of our high quality materials are ready for any patient that walks through our doors. He is an asset to our team and the person to go to for dental assisting expertise.

On his time off, Mike is an automobile enthusiast and enjoys exploring Southern California with his lovely wife.


Ruby is certified and trained in dental assisting and loves the science of dental arts. Her smile and quirky attitude make any patient's experience a fun and memorable one. With her extended knowledge in dentistry, she plans to continue studying oral health and dentistry in order to one day be an endodontist! You'll know her immediately from her smile and bubbly personality. With Ruby, you are sure to have fun at your appointment. 


In her spare time, she likes to spend time with her family and friends.


Dia was born and raised in Thailand. She moved here in 2004. She is fluent in reading and writing in Thai, Laos, and Hmong. Dia started learning English at the age of 13 years-old; learning English was not the easiest, however, she learned to use flash cards to help her memorizing words and relating it to images or arts that she drew in the back of each flash cards.

Dia started eighth grade and then went on to graduated high school in a small town called Merced, Central California. After high school, she then transferred to California State Polytechnic University, Pomona. Dia earned a Bachelor’s Degree of Science in Management and Human Resource.

Prior to working as a Dental Assistant and Marketer here, she worked with five hundred fortune corporation companies for several years. However, Dia has always loved the interactions with people. Dia absolutely valued the interactions with people because she connected on a personal level with individual people. In which, she did not often get the interactions with people while being with corporation companies. That was when she decided to make a change of career and here she is very happy with Irvine Endodontics!


Luan is very motivated, passionate and caring which makes him an excellent addition to the team. He’s a likable young man who works well with other and is great team player, with long and extensive knowledge about the dental field front and back. Luan is very devoted to our office, and helps maintaining the absolute best quality of treatment as well as making sure patients are comfortable and happy.

In his spare time, he likes to spend time with his family and friends going out, catching a movie or playing video games.