Certified Diabetes Educator Practice Exam 2026 - Free Practice Questions and Study Resource.

The classification for obesity according to the Body Mass Index (BMI) system defines obesity as a BMI of 30 and above. This standard is used to identify individuals who may be at increased risk for health issues associated with excessive body weight, such as type 2 diabetes, cardiovascular diseases, and certain cancers.

The other ranges outlined pertain to different classifications; for instance, a BMI of 18.5 to 24.9 is considered a normal weight range, while 25 to 29.9 indicates overweight. The range from 35 to 39.9 is categorized as severe obesity. Therefore, while these classifications are informative, the defining threshold for obesity is a BMI of 30 and above, making this the most accurate answer for the question regarding BMI classification for obesity.