`Z68.21` Body mass index [BMI] 21.0-21.9, adult

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

BMI adult codes are for use for persons 20 years of age or older
BMI pediatric codes are for use for persons 2-19 years of age.
These percentiles are based on the growth charts published by the Centers for Disease Control and Prevention (CDC)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Adult diagnoses (age 15 through 124): Age conflict edit. These diagnoses are clinically expected only in patients age 15 through 124.
Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Use Additional: E88.82 Obesity due to disruption of MC4R pathway ("code to identify body mass index (BMI), if known (Z68.-)")
Use Additional: R63.6 Underweight ("code to identify body mass index (BMI), if known (Z68.-)")
Use Additional: Z15.2 Genetic susceptibility to obesity ("code to identify body mass index (BMI), if known (Z68.-)")
Use Additional: Z71.3 Dietary counseling and surveillance ("code to identify body mass index (BMI), if known (Z68.-)")