drhassanNadia Hassan, DDS, MD – Oral Maxillofacial Surgeon
Dr. Nadia Hassan is a Southern California native who graduated from UCLA Oral & Maxillofacial Surgery program. Her career began with a biological science/neuroscience degree from the University of Southern California, where she graduated among the top of her class. She later decided to further her education by obtaining a dental degree from UCLA. While at the UCLA School of Dentistry, she received honors in several categories, as well as awards for clinical excellence and patient care. She once again graduated amongst the top of her class.

Dr. Hassan truly enjoyed the surgical aspect of dentistry while in dental school and decided to further her education in Oral and Maxillofacial Surgery at UCLA, which includes a Medical Degree from UCLA David Geffen Medical School, as well as an internship
certificate in general surgery, training in temporomandibular joint disorders, maxillofacial trauma, benign tumor resection and reconstruction and dental reconstruction with dental implants and allogeneic bone grafting.

Dr. Hassan truly enjoys what she does and is committed to enhancing patient care by integrating her biological education, dental, and surgical skills. She hopes to pursue research in the future, but is dedicated to patient care as her first priority.

When not working, Dr. Hassan enjoys travelling, skiing, reading or just hanging out with her family and friends.

Meet Our Team

Anna Grigoreva – Registered Dental Hygienist, 7 Yrs. Experience
Anna has been a dental professional for 10 years and loves educating patients about proper dental hygiene care. Anna’s favorite part of her job is helping her patients achieve optimum dental health and seeing results with regular visits.


CortneyCourtney Gotthardt – Treatment Coordinator
Courtney has extensive experience in clinically assisting Dr. Ruiz and his associates. Now she brings her dental background, strong interpersonal skills, positive attitude, and passion for working in the front office to her Treatment Coordinator position, which allows her the opportunity to extend her knowledge of Supra-Gingival Dentistry. On days Courtney is not extending her knowledge to patients in her front office position, she is Seminar Supply Coordinator and works very closely with Doctors from around the world to help Dr. Ruiz teach his techniques. When Courtney isn’t working she enjoys camping and outdoor activities.


Tanessa Cohen Lopez – Registered Dental Assistant with Expanded Functions 2
Tanessa has 13 years of experience providing patients with gentle quality care. A nurturer by heart, she is known for her calming aura. Tanessa loves learning and is eager to share her gifts using Dr. Ruiz’s unique techniques. She is one of the very few RDAEF 2 in the state of California. This high level of training and education allows Tanessa to serve your highest dental needs. When Tanessa isn’t working or taking care of her two amazing children, she loves wood working and hiking.


Marlen Stopsky – Marketing Director
Marlen is a social media marketing expert who has practiced this field for over 5 years. His main goal is to help patients and the dental community become aware of the benefits of Supra-Gingival dentistry, and the other valuable techniques taught by Dr. Ruiz at the Los Angeles Institute. On his free time Marlen enjoys surfing at the beach year round.


hannahHannah Levy – Project and Event Manager
Hannah is the Project and Operations Manager at Ruiz Dental Seminars and also helps out at Dr. Ruiz’s private dental practice. She enjoys her work because health is very important to her and hopes that more people become knowledgeable about Supra-gingival Minimally Invasive Dentistry because it leads to healthier gums and stronger teeth. Her goal is to keep learning and help expand the programs at Ruiz Dental Seminars. In her free time, she enjoys being active and working on music.