Weight Control Services. Except those services deemed preventive and given an ‘A’ or ‘B’ rating in current recommendations by the USPSTF, any service, treatment or program to lose, gain, or maintain weight, including and without limitation, appetite suppressants, dietary regimens, food or food supplements (except as described under Nutrition Therapy in Part IX. COVERED MEDICAL SERVICES), and exercise programs or equipment, whether or not a part of a treatment plan for a Condition.