Obesity becomes "morbid" when it reaches the point of significantly increasing the risk of one or more obesity-related health conditions or serious diseases (also known as co-morbidities) that result in either significant physical disability or even death.
Morbid obesity is typically defined as being 100 lbs. or more over ideal body weight or having a Body Mass Index (BMI) of 40 or higher. According to the National Institutes of Health Consensus Report, morbid obesity is a serious disease and must be treated as such. It is a chronic disease, meaning that its symptoms build slowly over an extended period of time. Use our Body Mass Index - BMI Calculator to determine your Body Mass Index - BMI.