5B81.01

ICD-11 MMS 2026-01

Obesity in adults

Description

Obesity is defined as a body mass index (BMI) greater than or equal to 30.00 kg/m². There are three levels of severity in recognition of different management options.

Index terms

  • Obesity in adults
  • Obesity in adults with BMI 30.00-34.99 kg/m²
  • Obesity in adults due to excess calories with Body-Mass-Index of 30 but less than 35 kg/m²
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  • Obesity in adults, class I
  • Obesity in adults with BMI 35.00-39.99 kg/m²
  • obesity in adults due to excess calories with Body-Mass-Index of 35 but less than 40 kg/m²
  • obesity in adults, class 2
  • obesity in adults, class II
  • Obesity in adults with BMI greater than or equal to 40.00 kg/m²
  • morbid obesity in adults
  • obesity in adults due to excess calories with Body-Mass-Index of 40 and more kg/m²
  • obesity in adults, class 3
  • obesity in adults, class III

Exclusions from above levels

  • 18 – Pregnancy, childbirth or the puerperium
  • http://id.who.int/icd/entity/1004987305 – Transitory endocrine or metabolic disorders specific to fetus or newborn

Sibling codes

  • 5B81.00 – Obesity in children or adolescents

Foundation entity

Obesity in adults – http://id.who.int/icd/entity/2062927079

Allowed postcoordination axes

Part of: 5B81.0: Obesity due to energy imbalance › 5B81: Obesity › 05: Endocrine, nutritional or metabolic diseases