Weekdays 8am-8pm, Sunday 9am-4pm

Dr. Klaus-Dieter Lessnau, MD
Dr. Klaus-Dieter Lessnau - MD
Pulmonology, Sleep Medicine, Insomnia Testing, Sleep Apnea Testing, Pulmonary Function Testing

Dr. Klaus Lessnau is highly regarded Pulmonology and Sleep Medicine doctor with over 30 years of experience. Dr. Lessnau holds multiple Board Certifications in Pulmonology, Bronchology, Sleep Medicine Disorders, and Critical Care. Dr. Lessnau is a highly respected and established physician who was named Best Doctor by New York Magazine in 2014. He is currently serving as a Director of Critical Care Medicine at Lennox Hill Hospital.