Hemangiomas are the most common tumor of infancy, generally thought to occur in up to 3% of infants. While often uncomplicated, some hemangiomas may have significant sequelae including impairment of vital function, ulceration, bleeding, and adverse cosmetic outcomes. Therefore, identification of high risk infantile hemangiomas by primary care physicians is extremely important, and early referral is the key to positive outcomes. This CLASP tool aims to help primary care providers identify which hemangiomas are high risk and would benefit from early evaluation and treatment by Connecticut Children’s Center for Cancer and Blood disorders.