Yes, you can. All programs – whether a big commercial program like Weight Watchers, Jenny Craig or a physician or hospital-based weight loss program – can be deducted, providing your doctor has confirmed that your current weight is a threat to your health, and has therefore ordered you to enroll in a program to treat a specific disease, whether obesity (a designated disease as of 2002), hypertension, heart disease, or high cholesterol, for example. You must have this in writing.
While you cannot deduct the obvious – such as the cost of diet foods (considered a personal expense), home exercise equipment, health club/gym/spa dues, nutritional supplements or any costs that are covered by insurance – legitimate program expenses include everything from initial fees to meeting fees to behavioral counseling, to appointments with physicians, dieticians, and nutritionists.