Z59.812Housing instability, housed, homelessness in past 12 months

Z59.812 is the ICD-10-CM diagnosis code for housing instability, housed, homelessness in past 12 months. It belongs to category Z59 (problems related to housing and economic circumstances), block Z55-Z65 (persons with potential health hazards related to socioeconomic and psychosocial 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 Z59.81 (housing instability, housed), Z59.812 is specifically for housing instability, housed, homelessness in past 12 months. Related codes cover with risk of homelessness (Z59.811) and unspecified (Z59.819).

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 was added in FY2022, effective October 1, 2021.