Is ICD-10-CM code Z68 billable?

No, Z68 (Body mass index [BMI]) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Z68 belong to?

Z68 belongs to Chapter 21 of the ICD-10-CM tabular list: Z00–Z99 (Factors Influencing Health Status and Contact with Health Services).

Z68Not billable, use a more specific code below

Body mass index [BMI]

chapter 21: Factors Influencing Health Status and Contact with Health Services

33 billable codes under Z68: 9 are a CC; 6 map to HCC 48 (Morbid Obesity).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

Instructional notes

Includes: conditions that are coded here

Kilograms per meters squared

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Section I.C.4.b Obesity (page 42), covers Z68
Category E66 has codes for causes and effects of obesity. Obesity class codes (E66.81-) need provider documentation and may be reported with other obesity codes, but code only class 3 when morbid obesity is also documented.

All codes under Z68

Z68 can't be used on a claim. Pick a billable code below; grey headings group them.

Z68 MS-DRGs

As the principal diagnosis, the billable codes under Z68 group to MS-DRG 951, 640, or 641 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 951 Other Factors Influencing Health Status (26 of 33 codes)
DRG 640 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC (7 of 33 codes)
DRG 641 Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC (7 of 33 codes)

Other codes that refer to Z68

Notes on these codes point to Z68.

E88.82 Use Additional Code: code to identify body mass index (BMI), if known (Z68.-)
R63.6 Use Additional Code: code to identify body mass index (BMI), if known (Z68.-)
Z15.2 Use Additional Code: code to identify body mass index (BMI), if known (Z68.-)
Z71.3 Use Additional Code: code to identify body mass index (BMI), if known (Z68.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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:

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.