F01.A18 Vascular dementia, mild, with other behavioral disturbance

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Major neurocognitive disorder due to vascular disease, mild, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
• Vascular dementia, mild, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition

Use additional code

• code, if applicable, to identify wandering in vascular dementia (Z91.83)

Applies from F01 Vascular dementia

Includes

• arteriosclerotic dementia
• major neurocognitive disorder due to vascular disease
• multi-infarct dementia

Applicable to

• Vascular dementia as a result of infarction of the brain due to vascular disease, including hypertensive cerebrovascular disease.

Code first

• , if applicable, any causal condition

Applies from F01.A Vascular dementia, mild

Excludes1 (never code together)

• mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 127 — Dementia, Mild or Unspecified
• RxHCC V08: HCC 112 — Dementia, Except Alzheimer's Disease
• ESRD V24: HCC 51

MS-DRG index

Defines the logic of DRG(s) 884 in MDC 19.

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

• Adult diagnoses (age 15 through 124): Age conflict edit. These diagnoses are clinically expected only in patients age 15 through 124.

Code annotations containing back-references to F01.A18

Back-references to F01.A

• Type 2 Excludes: F02 Dementia in other diseases classified elsewhere ("vascular dementia (F01.5-, F01.A-, F01.B-, F01.C-)")

Back-references to F01

• Type 2 Excludes: F06 Other mental disorders due to known physiological condition ("dementia as classified in F01-F02")
• Type 1 Excludes: F06.7 Mild neurocognitive disorder due to known physiological condition ("dementia (F01.-, F02.-, F03.-)")
• Type 2 Excludes: F63.1 Pyromania ("mental disorders due to known physiological condition (F01-F09)")
• Type 2 Excludes: F63.2 Kleptomania ("stealing in mental disorders due to known physiological condition (F01-F09)")
• Type 2 Excludes: F98.4 Stereotyped movement disorders ("stereotypies that are part of a broader psychiatric condition (F01-F95)")
• Type 1 Excludes: G31.84 Mild cognitive impairment of uncertain or unknown etiology ("dementia (F01.-, F02.-, F03.-)")
• Code Also: I67.850 Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy ("vascular dementia (F01.-)")
• Type 1 Excludes: R46 Symptoms and signs involving appearance and behavior ("mental and behavioral disorders (F01-F99)")

Diagnosis Index entries for F01.A18

• Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) › vascular (acute onset) (mixed) (multi-infarct) (subcortical) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) › mild › with › behavioral disturbances (sleep disturbance) (sexual disinhibition) (social disinhibition)
• Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) › vascular (acute onset) (mixed) (multi-infarct) (subcortical) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety) › mild › with › behavioral disturbances (sleep disturbance) (sexual disinhibition) (social disinhibition) › specified NEC

Nearby codes

• F01.54 Vascular dementia, unspecified severity, with anxiety
• F01.A Vascular dementia, mild
• F01.A0 Vascular dementia, mild, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
• F01.A1 Vascular dementia, mild, with behavioral disturbance
• F01.A11 Vascular dementia, mild, with agitation
• F01.A18 Vascular dementia, mild, with other behavioral disturbance (this code)
• F01.A2 Vascular dementia, mild, with psychotic disturbance
• F01.A3 Vascular dementia, mild, with mood disturbance
• F01.A4 Vascular dementia, mild, with anxiety
• F01.B Vascular dementia, moderate
• F01.B0 Vascular dementia, moderate, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety