Treat and Reduce Obesity Act of 2013 - Amends title XVIII (Medicare) of the Social Security Act to include information on the coverage of intensive behavioral therapy for obesity in the "Medicare and You Handbook."

Authorizes the Secretary of Health and Human Services (HHS) to allow other physicians, registered dietitians, certified diabetes educators, and instructors trained and certified by the National Diabetes Prevention Lifestyle Coach Training program of the Centers for Disease Control and Prevention (CDC) to provide, and be independently reimbursed for, intensive behavioral therapy for obesity furnished outside of the primary care setting, so long as any such nonphysician provider or instructor furnishing the therapy must communicate any recommendation or treatment plan for an individual to the individual's primary care physicians or practitioner.

Authorizes the Secretary to cover under Medicare part D (Voluntary Prescription Drug Benefit Program) medication for treatment of obesity or for weight loss management for an overweight individual with one or more comorbidities.