2027 ICD-10-CM Diagnosis Code Z68Body mass index [BMI]

ICD-10-CM Codes›Z00–Z99›BMI›Z68

ICD-10-CM Z68
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Z68 is a non-billable ICD-10-CM category code for body mass index [BMI], so it cannot be submitted on claims. Use a more specific code from this category instead, such as Z68.18, Z68.19, Z68.20, and Z68.21.

Code Identity

ICD-10-CM Code
Z68
Billable Status
No — Non-Billable Category
Code Describes
Body mass index [BMI]
Short Description
Body mass index [BMI]
Same as the full description in the CMS dataset.
Chapter
BMI
Body mass index (Z68)

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionBMIBody mass index (Z68)
CategoryZ68Body mass index [BMI]
This CodeZ68Body mass index [BMI]

Specific Coding for Body mass index [BMI]Overview

Non-specific codes like Z68 require more characters. Use one of these billable codes instead:

  • Z68.1 for Body mass index [BMI] 19.9 or less, adult

  • Use Z68.18 for Body mass index [BMI] 18.4 or less, adult

  • Use Z68.19 for Body mass index [BMI] 18.5-19.9, adult

  • Z68.2 for Body mass index [BMI] 20-29, adult

  • Use Z68.20 for Body mass index [BMI] 20.0-20.9, adult

  • Use Z68.21 for Body mass index [BMI] 21.0-21.9, adult

  • Use Z68.22 for Body mass index [BMI] 22.0-22.9, adult

  • Use Z68.23 for Body mass index [BMI] 23.0-23.9, adult

  • Use Z68.24 for Body mass index [BMI] 24.0-24.9, adult

  • Use Z68.25 for Body mass index [BMI] 25.0-25.9, adult

  • Use Z68.26 for Body mass index [BMI] 26.0-26.9, adult

  • Use Z68.27 for Body mass index [BMI] 27.0-27.9, adult

  • Use Z68.28 for Body mass index [BMI] 28.0-28.9, adult

  • Use Z68.29 for Body mass index [BMI] 29.0-29.9, adult

  • Z68.3 for Body mass index [BMI] 30-39, adult

  • Use Z68.30 for Body mass index [BMI] 30.0-30.9, adult

  • Use Z68.31 for Body mass index [BMI] 31.0-31.9, adult

  • Use Z68.32 for Body mass index [BMI] 32.0-32.9, adult

  • Use Z68.33 for Body mass index [BMI] 33.0-33.9, adult

  • Use Z68.34 for Body mass index [BMI] 34.0-34.9, adult

  • Use Z68.35 for Body mass index [BMI] 35.0-35.9, adult

  • Use Z68.36 for Body mass index [BMI] 36.0-36.9, adult

  • Use Z68.37 for Body mass index [BMI] 37.0-37.9, adult

  • Use Z68.38 for Body mass index [BMI] 38.0-38.9, adult

  • Use Z68.39 for Body mass index [BMI] 39.0-39.9, adult

  • Z68.4 for Body mass index [BMI] 40 or greater, adult

  • Use Z68.41 for Body mass index [BMI] 40.0-44.9, adult

  • Use Z68.42 for Body mass index [BMI] 45.0-49.9, adult

  • Use Z68.43 for Body mass index [BMI] 50.0-59.9, adult

  • Use Z68.44 for Body mass index [BMI] 60.0-69.9, adult

  • Use Z68.45 for Body mass index [BMI] 70 or greater, adult

  • Z68.5 for Body mass index [BMI] pediatric

  • Use Z68.51 for Body mass index [BMI] pediatric, less than 5th percentile for age

  • Use Z68.52 for Body mass index [BMI] pediatric, 5th percentile to less than 85th percentile for age

  • Use Z68.53 for Body mass index [BMI] pediatric, 85th percentile to less than 95th percentile for age

  • Use Z68.54 for Body mass index [BMI] pediatric, 95th percentile for age to less than 120% of the 95th percentile for age

  • Use Z68.55 for Body mass index [BMI] pediatric, 120% of the 95th percentile for age to less than 140% of the 95th percentile for age

  • Use Z68.56 for Body mass index [BMI] pediatric, greater than or equal to 140% of the 95th percentile for age

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z68: its own notes plus those printed at Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Kilograms per meters squared

Notes

General instructions on how these codes are used.

On Z68 itself
  • 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)
From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z68, its category, or a range that includes it.

Use Additional Code 4

These codes say to use an additional code from the note, and Z68 is one of the codes named.

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

Patient EducationClinical

Body Weight

Body weight is the total mass of your body. Keeping track of your weight is one way to check for changes in your health, but it can't tell you the whole story. That's because your weight includes muscle, bone, fat, and water. Also, everyday factors can play a role in your weight, such as your:

The full article covers:

  • What is body weight?
  • What factors help determine a healthy body weight?
  • What are body weight ranges?
  • What if I have a sudden gain or loss of weight?
  • How can I maintain a healthy body weight?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z68Overview

What is the ICD-10 code for body mass index [BMI]?

Z68 is the ICD-10-CM category for body mass index [BMI], but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is Z68 (Body mass index [BMI]) a billable code?

No. This is a category header that groups the codes for body mass index [BMI], and headers cannot be submitted on claims. Claims for body mass index [BMI] need a more specific code from this category, such as Z68.18, Z68.19, and Z68.20.