Obesity

Obesity is indexed under Metabolic & Endocrine, Metabolic. Also known as morbid obesity, severe obesity, class III obesity.

US prevalence

40.3% of adults have obesity (BMI >=30), age-adjusted; 9.4% have severe obesity (BMI >=40) Source: CDC NHANES August 2021 to August 2023 (NCHS Data Brief No. 508). Federal source. Label: VERIFIED.

ICD-10-CM codes

E66.0, E66.01, E66.09, E66.9

Typical onset

All ages; highest prevalence 40-59 years

Course

lifelong

Body systems

endocrine, cardiovascular, musculoskeletal, gastrointestinal

Sex differences

Women: ~44%; Men: ~40%

Racial and ethnic differences

Highest in Black (49.9%) and Hispanic (45.6%) adults

What this page does not establish

These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.

Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.

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