Z91.83 Wandering in diseases classified elsewhere

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

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-)

Applies from Z91 Personal risk factors, not elsewhere classified

Excludes2 (not included here)

• contact with and (suspected) exposures hazardous to health (Z77.-)
• exposure to pollution and other problems related to physical environment (Z77.1-)
• female genital mutilation status (N90.81-)
• occupational exposure to risk factors (Z57.-)
• personal history of physical injury and trauma (Z87.81, Z87.82-)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V40.31 Wandering in diseases classified elsewhere

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to Z91.83

Back-references to Z91.83

• Use Additional: F01.518 Vascular dementia, unspecified severity, with other behavioral disturbance ("code, if applicable, to identify wandering in vascular dementia (Z91.83)")
• Use Additional: F01.A18 Vascular dementia, mild, with other behavioral disturbance ("code, if applicable, to identify wandering in vascular dementia (Z91.83)")
• Use Additional: F01.B18 Vascular dementia, moderate, with other behavioral disturbance ("code, if applicable, to identify wandering in vascular dementia (Z91.83)")
• Use Additional: F01.C18 Vascular dementia, severe, with other behavioral disturbance ("code, if applicable, to identify wandering in vascular dementia (Z91.83)")
• Use Additional: F02.818 Dementia in other diseases classified elsewhere, unspecified severity, with other behavioral disturbance ("code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)")
• Use Additional: F02.A18 Dementia in other diseases classified elsewhere, mild, with other behavioral disturbance ("code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)")
• Use Additional: F02.B18 Dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance ("code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)")
• Use Additional: F02.C18 Dementia in other diseases classified elsewhere, severe, with other behavioral disturbance ("code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)")
• Use Additional: F03.918 Unspecified dementia, unspecified severity, with other behavioral disturbance ("code, if applicable, to identify wandering in unspecified dementia (Z91.83)")
• Use Additional: F03.A18 Unspecified dementia, mild, with other behavioral disturbance ("code, if applicable, to identify wandering in unspecified dementia (Z91.83)")
• Use Additional: F03.B18 Unspecified dementia, moderate, with other behavioral disturbance ("code, if applicable, to identify wandering in unspecified dementia (Z91.83)")
• Use Additional: F03.C18 Unspecified dementia, severe, with other behavioral disturbance ("code, if applicable, to identify wandering in unspecified dementia (Z91.83)")

Diagnosis Index entries for Z91.83

• Wandering › in diseases classified elsewhere

Nearby codes

• Z91.51 Personal history of suicidal behavior
• Z91.52 Personal history of nonsuicidal self-harm
• Z91.8 Other specified personal risk factors, not elsewhere classified
• Z91.81 History of falling
• Z91.82 Personal history of military deployment
• Z91.83 Wandering in diseases classified elsewhere (this code)
• Z91.84 Oral health risk factors
• Z91.841 Risk for dental caries, low
• Z91.842 Risk for dental caries, moderate
• Z91.843 Risk for dental caries, high
• Z91.849 Unspecified risk for dental caries