Z72.821Inadequate sleep hygiene

Z72.821 is the ICD-10-CM diagnosis code for inadequate sleep hygiene. It belongs to category Z72 (problems related to lifestyle), block Z69-Z76 (persons encountering health services in other circumstances) and chapter 21 (factors influencing health status and contact with health services). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Z72.82 (problems related to sleep), Z72.821 is specifically for inadequate sleep hygiene. Related codes cover sleep deprivation (Z72.820) and risk of suffocation (smothering) under another while sleeping (Z72.823).

Don't report Z72.821 together with the conditions in its Excludes1 note: insomnia (F51.0-, G47.0-).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as V69.8 (other problems related to lifestyle).