Zack Schreyer, RPSGT  
            Helene A. Emsellem, MD, FAASM
            Medical Director

            John R. Ruddy, MD
            Linda C. Croom, ANPC
            Annemarie Zabbara, PA-C
            Tina Sullivan, ACNP-BC







Zack Schreyer, RPSGT

Zack Schreyer is a Daytime Sleep Technologist who graduated from California State Polytechnic University, Pomona, with a Bachelor of Science degree in Biology in May 2012. He scores sleep studies, fits patients with CPAP masks, and educates patients on how to use and maintain their machines. He also helps run daytime sleep studies and teaches patients how to use their CPAP equipment. He recently moved to the D.C. area from California and plan to go to graduate school in the future.




5454 Wisconsin Ave.,
Suite 1725
Chevy Chase, MD 20815

Phone: 301-654-1575
Fax: 301-654-5658