2026 ICD-10-CM Diagnosis Code Z59.819Housing instability, housed unspecified
Z59.819 is a billable ICD-10-CM diagnosis code for housing instability, housed unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as housing insecurity. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Socioeconomic/psychosocial factors.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z59.819.
Present on Admission (POA)Billing
Z59.819 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Housing insecurity
- Housing instability
- Housing instability due to being behind on payments for place of residence
- Housing instability due to frequent change in place of residence
- Housing instability due to housing cost burden
- Housing instability due to threat of eviction
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
- extreme poverty Z59.5
- financial insecurity Z59.86
- low income Z59.6
- material hardship due to limited financial resources, not elsewhere classified Z59.87
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Instability
- housing
- housed
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Housing Instability
this encompasses a number of challenges, such as having trouble paying rent, living in overcrowded conditions, moving frequently, living with friends or relatives out of necessity, being unhoused, or spending the bulk of household income (>50%) on housing. (https://www.healthypeople.gov/2020/topics-objectives/topic/social-determinants-health/interventions-resources/housing-instability)
Code History & ChangesHistory
Replacement Z59.819 replaces the following previously assigned code(s):
- Z59.8 - Other problems related to housing and economic circumstances
Questions About Z59.819Overview
Is Z59.819 (Housing instability, housed) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report housing instability, housed unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z59.819 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because housing instability, housed unspecified describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z59.819 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for housing instability, housed unspecified on inpatient claims.
