Our Team

Experts in All Aspects of Sleep Treatments – so You Can Sleep Better, Faster! Award-winning Doctors and Medical Researchers.

Jordan Stern, MD

Founder & Director

Dr. Stern is a New York Times best-selling author and award-winning Head and Neck Surgeon, board certified in Otolaryngology and Sleep Medicine.  

Zuzana Belisova, MD

Sleep Medicine

Dr. Belisova is board certified in Neurology and Sleep Medicine. She is on Faculty at NYU Medical Center and is the director of the Manhattan VA Sleep center.

Dr Chaimaa Raghay


Dr. Raghay focuses on sleep apnea insomnia, and CPAP patient education. She also leads BlueSleep's clinical operations.

Alicia Jackson, DDS

Dental Sleep Medicine

Dr. Jackson supervises the delivery of care through telemedicine for our patients treated with oral appliance therapy for sleep apnea. Her experience spans the full spectrum of virtual care from home impressions to home delivery of custom made oral appliances for sleep apnea.

Hal Alpert, MD

Sleep Medicine

Dr. Alpert is board certified in Sleep Medicine, Internal Medicine, Pulmonary and Critical Care Medicine, and has over 30 years experience in diagnosis and treatment of sleep disorders.

Billie Jean Bertrand, PA

Sleep Medicine

A registered Physician Assistant with over 20 years experience.

Chonnipa Hongjaisee, PA

Sleep Medicine

At BlueSleep, Chonnipa focuses on diagnosis and treatment of sleep apnea, snoring and insomnias. She is a former sleep technologist, and has extensive experience in CPAP treatments.

Jaime Engholdt, PA

Sleep Medicine

Jaime focuses on diagnosis and treatment of sleep apnea and snoring by telemedicine

Cindy Logue PA-C

Sleep Medicine

Sleep Medicine PA with experience in Ear Nose and Throat, weight loss, and general medicine

Kiwon Lee, DDS

Dental Sleep Medicine

Dr. Kiwon Lee is a diplomate of the American Academy of Dental Sleep Medicine, and is co-investigator with Dr. Stern on the first study evaluating compliance of oral appliance therapy using embedded digital compliance trackers.

Sundra Katrakazos, PA-C

Sleep Telemedicine

Sundra provides telemedicine consultations for new and established patients and focuses on sleep apnea and snoring at BlueSleep.

Claudia Neely, PA

Sleep Medicine

Claudia has over 20 years experience as a registered Physician Assistant, and is now specialized in the diagnosis and treatment of sleep apnea and other sleep disorders at our NYC centers and through telemedicine.

Anyssa Fraser

Medical Assistant

Anyssa Frasier assists the BlueSleep team with patient education on oral appliance therapy, appliance fittings, and 3D digital scans. Anyssa loves to help BlueSleep patients improve their sleep habits to help them be the best they can be during the day.