Wendy Helaine Marx MD 666 Lexington Ave Ste 206 Katonah, New York, Phone: 914-666-3456 Company: Vandersteeg John S MD Doctor Category: Pediatric Adolescent Medicine Profile Let this business know you found them on Hudson Valley's Online Directories. Locations Katonah 666 Lexington Ave Ste 206 Katonah, New York 10549-3632 Claim/Edit Listing