Z68.18 — Body mass index [BMI] 18.4 or less, adult
Is Z68.18 billable?
Yes — Z68.18 is billable for FY2027. Z68.18 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z68.18 may be submitted for encounters from October 1, 2026 through September 30, 2027. Z68.18 is new in FY2027.
Z68.18 at a glance
| Code | Z68.18 |
|---|---|
| Description | Body mass index [BMI] 18.4 or less, adult |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| FY2027 change | New in FY2027 |
What Medicare edits apply to Z68.18?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z68.18 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does Z68.18 group to?
Z68.18 sits in MDC 23 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 951Other Factors Influencing Health Statusmedical
As a secondary diagnosis, Z68.18 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is Z68.18 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z68.18. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Body, bodies › mass index › adult › 18.4 or less, adult