Body mass index (BMI) (Z68) ICD-10-CM
The Z68 code range covers body mass index (bmi) with 37 ICD-10-CM diagnosis codes. 32 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Kilograms per meters squared
- 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)
Codes in the Z68 Range 37 codes · 32 billable
- Z68 Body mass index [BMI]Non-billable
- Z68.1 Body mass index [BMI] 19.9 or less, adult
- Z68.2 Body mass index [BMI] 20-29, adultNon-billable
- Z68.20 Body mass index [BMI] 20.0-20.9, adult
- Z68.21 Body mass index [BMI] 21.0-21.9, adult
- Z68.22 Body mass index [BMI] 22.0-22.9, adult
- Z68.23 Body mass index [BMI] 23.0-23.9, adult
- Z68.24 Body mass index [BMI] 24.0-24.9, adult
- Z68.25 Body mass index [BMI] 25.0-25.9, adult
- Z68.26 Body mass index [BMI] 26.0-26.9, adult
- Z68.27 Body mass index [BMI] 27.0-27.9, adult
- Z68.28 Body mass index [BMI] 28.0-28.9, adult
- Z68.29 Body mass index [BMI] 29.0-29.9, adult
- Z68.3 Body mass index [BMI] 30-39, adultNon-billable
- Z68.30 Body mass index [BMI] 30.0-30.9, adult
- Z68.31 Body mass index [BMI] 31.0-31.9, adult
- Z68.32 Body mass index [BMI] 32.0-32.9, adult
- Z68.33 Body mass index [BMI] 33.0-33.9, adult
- Z68.34 Body mass index [BMI] 34.0-34.9, adult
- Z68.35 Body mass index [BMI] 35.0-35.9, adult
- Z68.36 Body mass index [BMI] 36.0-36.9, adult
- Z68.37 Body mass index [BMI] 37.0-37.9, adult
- Z68.38 Body mass index [BMI] 38.0-38.9, adult
- Z68.39 Body mass index [BMI] 39.0-39.9, adult
- Z68.4 Body mass index [BMI] 40 or greater, adultNon-billable
- Z68.41 Body mass index [BMI] 40.0-44.9, adult
- Z68.42 Body mass index [BMI] 45.0-49.9, adult
- Z68.43 Body mass index [BMI] 50.0-59.9, adult
- Z68.44 Body mass index [BMI] 60.0-69.9, adult
- Z68.45 Body mass index [BMI] 70 or greater, adult
- Z68.5 Body mass index [BMI] pediatricNon-billable
- Z68.51 Body mass index [BMI] pediatric, less than 5th percentile for age
- Z68.52 Body mass index [BMI] pediatric, 5th percentile to less than 85th percentile for age
- Z68.53 Body mass index [BMI] pediatric, 85th percentile to less than 95th percentile for age
- Z68.54 Body mass index [BMI] pediatric, 95th percentile for age to less than 120% of the 95th percentile for age
- Z68.55 Body mass index [BMI] pediatric, 120% of the 95th percentile for age to less than 140% of the 95th percentile for age
- Z68.56 Body mass index [BMI] pediatric, greater than or equal to 140% of the 95th percentile for age
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Z68 range.
Body Mass Index
An indicator of body density as determined by the relationship of BODY WEIGHT to BODY HEIGHT. BMI=weight (kg)/height squared (m2). BMI correlates with body fat (ADIPOSE TISSUE). Their relationship varies with age and gender. For adults, BMI falls into these categories: below 18.5 (underweight); 18.5-24.9 (normal); 25.0-29.9 (overweight); 30.0 and above (obese). (National Center for Health Statistics, Centers for Disease Control and Prevention)
Obesity Paradox
An observation that high BODY MASS INDEX is sometimes associated with lower CARDIOVASCULAR DISEASE mortality in certain population, e.g., ELDERLY.
About the Z68 Code Range
ICD-10 Code Z68 is used to document a person’s body mass index (BMI), an important measure that reflects body fat based on height and weight. This range includes specific BMI categories for adults and children to assist in clinical assessments and health management.
The codes in the Z68 category detail BMI values across various ranges. For adults, codes like Z68.1 indicate BMIs under 20, reflecting a below-normal or decreased body mass index, while Z68.2 covers BMI from 20 to 29, a range considered normal or overweight. Higher BMI codes such as Z68.3 and Z68.4 specifically target obesity, with subdivisions for classes of obesity (e.g., 30.0 to over 70). For example, Z68.41 corresponds to a BMI of 40.0 to 44.9, often referred to as severely obese or increased BMI. Pediatric BMI codes, from Z68.5 onwards, classify BMI percentiles relative to age groups, identifying children whose BMI is below the 5th percentile or exceeding the 95th percentile, indicating underweight or obesity status respectively. This detailed coding system helps healthcare professionals accurately record body composition status to guide diagnosis and treatment plans.
Questions About This Page
How many billable codes are in the Z68 range?
Of the 37 codes in this range, 32 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Z68 range classify?
The range classifies body mass index (bmi). Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
