Bariatric medicine deals with the causes, prevention and treatment of obesity. A bariatric medicine physician, or bariatrician, may treat patients with diet and nutrition, exercise, behavior modification or medication. The bariatrician may also coordinate patient care with a bariatric surgeon, who may perform surgery. Bariatric or gastric bypass surgery, also known as roux-en-Y gastric bypass, creates a small pouch of the stomach that bypasses part of the intestine. When the size of the stomach is reduced by surgery, it allows less food to be ingested, resulting in weight loss.

Obesity is damaging to one’s health: some of the negative effects of obesity are heart disease, diabetes, some forms of cancer, hypertension, asthma, obstructive sleep apnea, arthritis; and obesity has been known to shorten one’s lifespan.

Doctor density varies by specialty and location. Washington, D.C. has 1 practicing bariatric doctor in Washington.

According to 2005 Census estimates, Washington, D.C. has a population of 550,521. Of this population, 110,240 are under the age of 18 and 66,591 are at or above the age of 65.