Dr. N. P. Hennessey is a dermatologist in New York, New York and is affiliated with multiple hospitals in the area, including Stony Brook University Hospital and NYU Langone Hospitals. He received his medical degree from Michigan State University College of Human Medicine and has been in practice for more than 20 years. Dr. N. P. Hennessey has expertise in treating shingles, psoriasis, acne, among other conditions - see all areas of expertise. Dr. N. P. Hennessey accepts Medicare, Aetna, Humana, Cigna, Blue Cross, United Healthcare - see other insurance plans accepted. Dr. N. P. Hennessey is highly recommended by patients.