ICD-10-CM > Z00-Z99 > Z68-Z68 > Z68 > Z68.4 Z68.4 Body mass index [BMI] 40 or greater, adult Non-Billable/Non-Specific Codes Z68.41Body mass index [BMI] 40.0-44.9, adultZ68.42Body mass index [BMI] 45.0-49.9, adultZ68.43Body mass index [BMI] 50.0-59.9, adultZ68.44Body mass index [BMI] 60.0-69.9, adultZ68.45Body mass index [BMI] 70 or greater, adult