The eating disorders anorexia nervosa and bulimia nervosa have been re
ported to occur in Type I diabetes mellitus. Although prevalence estim
ates vary, the most rigorous studies yield rates similar to the popula
tion at large. Intentional insulin omission is more common, especially
in young diabetic women, and at times may indicate an eating disorder
in Type I diabetic patients. Both diagnosable eating disorders and in
tentional insulin omission are associated with worse glycemic control
and higher rates of secondary diabetic complications. Recognition of t
hese conditions, followed by carefully coordinated treatment involving
both diabetes care providers and mental health providers, is necessar
y to improve treatment outcome.