New for FY2027 ICD-10-CM · October 1, 2026
Z68.19: Body mass index [BMI] 18.5-19.9, adult
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Body mass index [BMI] 18.5-19.9, adult. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
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:
Source: Z00-Z99 (chapter, inherited).
Instructional note
(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.
Source: Z00-Z99 (chapter, inherited).
Instructional note
(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: Z00-Z99 (chapter, inherited).
Instructional note
Kilograms per meters squared
Source: Z68 (category, inherited).
Instructional note
BMI adult codes are for use for persons 20 years of age or older
Source: Z68 (category, inherited).
Instructional note
BMI pediatric codes are for use for persons 2-19 years of age.
Source: Z68 (category, inherited).
Instructional note
These percentiles are based on the growth charts published by the Centers for Disease Control and Prevention (CDC)
Source: Z68 (category, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does Z68.19 mean in FY2027?
The official ICD-10-CM descriptor is Body mass index [BMI] 18.5-19.9, adult. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
When did Z68.19 become an ICD-10-CM code?
Z68.19 is new for FY2027 ICD-10-CM, effective October 1, 2026. It is absent from the FY2026 April order file. Use the code set that applies to the encounter or inpatient discharge date, and check the official Tabular instructions.
Is Z68.19 billable in FY2027?
The FY2027 order file marks Z68.19 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does Z68.19 map to an HCC?
Z68.19 is not in the current CMS mapping file (it is new for FY2027), and CMS has not yet published payment year 2028 mappings. No HCC category or RAF coefficient is shown.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.