Dr. John S. Walczyk is a dermatologist in Manhasset, New York and is affiliated with multiple hospitals in the area, including New York-Presbyterian Children’s Hospital-Columbia and Cornell and New York-Presbyterian Hospital-Columbia and Cornell. He received his medical degree from Columbia University Vagelos College of Physicians and Surgeons and has been in practice for more than 20 years. Dr. John S. Walczyk has expertise in treating shingles, psoriasis, among other conditions - see all areas of expertise. Dr. John S. Walczyk accepts Medicare, Aetna, Humana, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted.