2026 ICD-10-CM Diagnosis Code Z91.83Wandering in diseases classified elsewhere
Z91.83 is a billable ICD-10-CM diagnosis code for wandering in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is a manifestation code that cannot be reported as the principal diagnosis and exempt from POA reporting. Coders also document this condition as tendency to wander. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified status.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z91.83.
Present on Admission (POA)Billing
Z91.83 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.
- Tendency to wander
- Wandering
- Wandering due to dementia
- Wanders at night
- Wanders during day and at night
- Wanders during the day
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
- underlying disorder such as:
- Alzheimer's disease G30
- autism or pervasive developmental disorder F84
- intellectual disabilities F70 F79
- unspecified dementia with behavioral disturbance F03.9 F03.A F03.B F03.C
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- in diseases classified elsewhere - Z91.83
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Wandering
- in diseases classified elsewhere
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert Z91.83 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z91.83Overview
Is Z91.83 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report wandering in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Can Z91.83 be a principal diagnosis?
No. This is a manifestation code: wandering in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
Is Z91.83 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 wandering in diseases classified elsewhere on inpatient claims.
What is the ICD-9 equivalent of Z91.83?
Under the General Equivalence Mappings, wandering in diseases classified elsewhere converts to ICD-9-CM V40.31 (wandering-dis elsewhere). The mapping is a direct match.
