Meet Our Doctors
Dr. Barouir Deirmenjian
As a general dentist, Dr. Deirmenjian is devoted to providing quality, rewarding, and compassionate care to every patient that visits him. Serving as the founder and CEO of B. Deirmenjian and Affiliates, he serves patients at many multi-specialty facilities in California, including Los Angeles, San Gabriel Valley, Riverside and San Bernardino counties and has just added three new locations in the San Diego area.
With nineteen locations in California, B. Deirmenjian and Affiliates serve patients of all ages, from all backgrounds, and from every walk of life. The team of specialists, general dentists, assistants, and benefit coordinators offer a number of services, including: cosmetic dentistry, dental implants, endodontics, family dentistry, oral surgery, orthodontics, pediatric dentistry, and periodontics. They are dedicated to making dental care rewarding, so that individuals have a reason to share their smile.
Before entering private practice, Dr. Deirmenjian served as Dental Director at Guards Dental, where he demonstrated strong leadership skills in operating over 40 locations. Subsequently, he established his own family dental private practices, Smiles West, Desert Dental Group, and Ponderosa Dental Group.
To prepare for his career, he completed his undergraduate studies at the University of California at Irvine, where he earned his Bachelor of Science degree in 1988. Furthering his studies, he went on to obtain his Doctor of Dental Surgery degree from the University of the Pacific Arthur A. Dugoni School of Dentistry in 1999.
Remaining abreast of the latest dental developments, Dr. Deirmenjian is an active member of the American Dental Association and the California Dental Association. He is also a peer-review member at MetLife Insurance and Liberty Dental, sits on the advisory committee of Henry Schein Dental, is a UCLA adjunct professor, and is board-certified by the Dental Board of California.
Revered for his extensive 30+ year leadership background, Dr. Deirmenjian has been voted #100 on the Inc.5000 Series list of the Fastest-Growing Companies in California and #1528 of the Inc. 5000 Fastest-Growing Companies nationally. He was also named one of LA Business of the Year, Best Office by Insurance Companies, and one of the Emerging Dental Groups to Watch 2020 by Group Dentistry Now.
Dentistry, also known as Dental and Oral Medicine, is a branch of medicine that consists of the study, diagnosis, prevention, and treatment of diseases, disorders, and conditions of the oral cavity. Dentists diagnose and treat dental issues and help patients develop better oral hygiene regimens. They clean teeth, correct bite issues, perform surgeries and extractions, and perform other duties to ensure that the teeth and mouth are healthy.
An active member of his community, Dr. Deirmenjian truly enjoys helping the less fortunate and volunteering when he can with food drives and community outreach initiatives. Previously, he has participated in pro bono work for human trafficking victims in the Los Angeles area. He was also involved in a health fair head-start program, senior citizens program, and maintained an affiliation with Veteran Affairs.
In his spare time, he enjoys the outdoors. He is fluent in English, Armenian, Spanish, and French.
Dr. James Ogisaka
Dr. James H. Ogisaka, DDS, was born and raised in Chicago, Illinois. He attended Loyola University’s School of Dentistry for his DDS after graduating from the University of Illinois. He joined the practice in September 2019 and loves the amazing team he works with and the patients that he gets to meet. With over 25 years of experience and an emphasis in cosmetic dentistry, he loves to help people smile and take care of themselves.
Outside of the office, Dr. Ogisaka enjoys yoga, aerobics, tennis and roller skating.
Dr. Jaime Gochez
Bio coming soon.
Dr. Ouk Hyun Lee
Bio coming soon.
Dr. Mohamed Hammam
Bio coming soon.
Dr. Grace Sanchez
Bio coming soon.
Dr. Michael Vongphoe
Dr. Michael Vongphoe, DDS, attended the University of Southern California. His patients are always treated like family. This includes a transparent and thorough assessment of their dental issues, a clear discussion of options and most importantly, a quick and pain-free experience. Dr. Vongphoe is a member of the ADA, CDA and the AAE (American Association of Endodontists).
Outside of the office, he enjoys traveling and spending time with his family.
Dr. Joshua Shayefar
Bio coming soon.
Dr. Fariba Matinfar
Dr. Fariba Matinfar, DDS, MS, earned her Doctor of Dental Surgery, Master of Science and periodontal specialty degrees from the University of California, Los Angeles. She loves to help patients have a beautiful, healthy smile and maintain their oral health. Dr. Matinfar is a member of the American Academy of Periodontology, the American Dental Association and the California Dental Association.
Outside of the office, she enjoys spending time with her family, hiking and going to the beach. She looks forward to traveling the world in the future and currently fosters puppies with her family!
Dr. Jane Caballero
Dr. Jane Caballero, DDS, earned her BS in biological sciences from the University of Southern California. She then completed a general practice residency at the University of California, Los Angeles and the pediatric dentistry program at the University of Illinois at Chicago. Serving as a pedodontist, Dr. Caballero has a passion for children’s health and giving care to those less fortunate. She has been awarded the American college of dentist award as well as the academy of operative dentistry award.
Dr. Shahram (David) Mashhadian
Dr. David Mashhadian, DDS, MD, FACS, earned his MD degree from the Mount Sinai School of Medicine, his DDS degree from the New York University College of Dentistry and his BA degree from Hofstra University. He is a fellow at the American College of Surgeons, ACS the American Academy of Cosmetic Surgery, AACS, the California Academy of Cosmetic Surgery, CACS, the American Association of Oral & Maxillo-Facial Surgeons, AAOMS and the California Association of Oral & Maxillo-Facial Surgeons, CALAOMS.
Outside of the office, Dr. Mashhadian enjoys volunteering with Smile Generation Day and Thousand Smiles.
Dr. Jeffrey Hwang
Dr. Jeff Hwang, DDS, MS, earned his DDS and MS in orthodontics from the Loma Linda University School of Dentistry. He loves the esthetic aspect of dentistry, especially orthodontics and believes that changing a person’s smile can have such a positive effect on his or her self-esteem.
Dr. Hwang is an assistant professor at the Loma Linda University School of Dentistry, and outside of the office, he enjoys traveling, playing sports such as volleyball and tennis, scuba diving, cooking and playing the violin.