Child Suicide Prevention and Lethal Means Safety Act This bill requires the Department of Health and Human Services (HHS) to establish grant programs and set up a website to reduce suicide rates among youth and young adults (those under age 26), including by addressing the use of firearms in suicides and suicide attempts. Specifically, HHS must award grants to states, Indian tribes, health departments, hospitals, or other organizations to train health care providers on lethal means safety (e.g., safe storage of firearms), relevant laws concerning the use and possession of firearms, and other suicide prevention and intervention strategies for youth and young adults. Grantees may use a portion of funds to make secure gun storage or safety devices available to residences with an individual under age 26 who is at risk of suicide. In addition, HHS must award grants to health professional schools to integrate content into their curricula and continuing education programs about suicide prevention strategies and interventions to reduce suicide rates among youth and young adults. The bill also requires HHS to develop and maintain a website that contains information for individuals under age 26, their families, health care providers, and health professional schools concerning suicide prevention and the use of firearms in suicide attempts.