Back to search results Demy A. Sebastian, FNP Surgical Critical CareSurgery Contact Westchester Medical Center 100 Woods Road Valhalla, NY 10595 Directions 914-493-5271 No Ratings yet. Learn more WMCHealth Provider OverviewPractice LocationsMedical EducationPublicationsReviews Overview Specialties Surgical Critical CareSurgery Languages EnglishMalayalam Gender Female NPI 1629667100 Practice Locations Westchester Medical Center 100 Woods Road Valhalla, NY 10595 Directions 914-493-5271 Medical Education Board Certifications Family Nurse Practitioner Publications Most RecentAlphabetical Oldest First *National Library of Medicine search results may include other providers with similar names. Ratings and Reviews Most RecentHighest Rating Lowest Rating Is this your profile? Submit edits/updates. Enter your WMCHealth email address to receive a link you can use to submit your change request. Send