National Eating Disorders Association (NEDA) - the largest nonprofit organization dedicated to supporting individuals and families affected by eating disorders. NEDA serves as a catalyst for prevention, cures and access to quality care.
https://www.nationaleatingdisorders.org/about-us
National Eating Disorders Association (NEDA) Helpline:
1-800-931-2237
This helpline offers support Monday–Thursday from 9 a.m.–9 p.m. EST, and Friday from 9 a.m.–5 p.m. EST. The Helpline assists with support, information, referrals, and guidance about treatment options for either you or your loved one.
National Association of Anorexia Nervosa and Associated Disorders: 1-630-577-1330
Trained hotline volunteers offer encouragement to those having problems around eating or binging, support for those who “need help getting through a meal,” and assistance to family members who have concerns that their loved one might have an eating disorder.
Eating Disorder Signs, Symptoms, Treatment and Therapy - National Institute of Mental Health
https://www.nimh.nih.gov/health/topics/eating-disorders/index.shtml