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Meet Our Doctors

Dr. Barouir Deirmenjian

General Dentist & Owner of B. Deirmenjian and Affiliates

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. Elizabeth Chak

General Dentist

Dr. Elizabeth Chak grew up in Irvine, California where she attended University High School. She then went to University of California, San Diego where she received her bachelor’s degree in biochemistry. Dr. Chak earned her Doctor of Medicine in Dentistry from Temple University, Maurice H. Kornberg School of Dentistry in Philadelphia, Pennsylvania in 2017.

Upon graduation, Dr. Chak practiced general dentistry in Pennsylvania for one year and then returned to California where she continued her career. She has ample of experience in general and cosmetic dentistry, as well as pediatric dentistry.

Dr. Chak spends her free time practicing in the ballet studio, going to the beach, and cuddling with her two fluffy dogs.

Dr. Kinha Thakkar

General Dentist

Dr. Kinha Thakkar embarked on her dental journey in India, obtaining a Bachelor of Dental Surgery in 2013 and a Master of Dental Surgery in endodontics in 2017. Her commitment to excellence led her to further her education at the University of Southern California (USC), where she earned her DDS in 2021. Dr. Thakkar joined our dental practice in June 2023, bringing with her a wealth of knowledge and a passion for endodontics. Her professional affiliations include the American Dental Association (ADA), the California Dental Association (CDA), and the Orange County Dental Society, reflecting her dedication to staying connected and updated in her field.

Born and raised in India, Dr. Thakkar finds great joy in the dental profession, particularly in helping people gain confidence through their smiles. Her approach to patient care is deeply personal, considering her patients as an extension of her family. This sense of familial care has become her favorite aspect of interacting with patients, where she feels honored to provide care every day. 

Outside the office, Dr. Thakkar indulges in diverse hobbies that reflect her vibrant personality. She loves exploring different cuisines, enjoys leisurely walks, frequently visits beaches, and has a passion for shopping. This blend of professional dedication and personal interests shapes Dr. Thakkar’s unique approach to dentistry, where she combines skill, care, and a deep understanding of her patients’ needs.


Dr. Arshan Haghi

Board-Certified Orthodontist - D.M.D. M.Sc.D. C.A.G.S.

Dr. Arshan Haghi was born in Iran and raised in Dubai. He graduated with great distinction from McGill University with a bachelor’s degree in anatomy and cell biology in 2007. Dr. Haghi also graduated summa cum laude from Boston University Dental School in 2011 and Boston University Ortho residency in 2014. 

Dr. Haghi joined our team in July of 2022 and practices at our Lake Forest office. His favorite thing about working in the dental industry is transforming patients’ smiles and giving them more confidence.

Dr. Haghi’s affiliations & organizations he belongs to includes Diplomate of the American Board of Orthodontics, the American Association of Orthodontics and the California Association of Orthodontics.

Outside of work, Dr. Haghi enjoys traveling, staying fit and active, spending time outdoors, and spending time with family.

Dr. Armand

Dr. Armand Keuroghlian

Oral & Maxillofacial Surgeon

Dr. Armand Keuroghlian received his DDS degree from UCLA School of Dentistry and completed a 1 year internship at Parkland Memorial Hospital in Dallas, Texas. Prior to graduating from the UCLA School of Dentistry, Dr. Armand obtained a biology degree from the University of California, Irvine.

While working toward his dental degree at UCLA, he researched implants and their integration with bone and received numerous awards, including the OMFS Student Award and Dean’s Leadership Institute. While in dental school, he gravitated toward the surgical aspect of dentistry, so he decided to continue his education in oral and maxillofacial surgery at Harbor – UCLA.

While patient care is his first priority, Dr. Armand hopes to have an academic role in the future. 

Dr. Armand enjoys sports, hanging out with his friends, and traveling. He is also fluent in Armenian.

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    Our Stance on COVID-19

    We understand that this is an unprecedented time for many patients with the coronavirus still being an active concern. However, more than ever before, your oral health plays a crucial role in your overall health. The mouth is the gateway to the body, but when common oral infection and disease take hold, it impacts your immune system! This can make you more susceptible to becoming sick in the future. Your best defense is good oral health, and maintaining your regular dental appointments makes that possible. We are following all CDC guidelines to provide our patients and team with a healthy and safe environment to provide life changing dental care.