F02.B18Dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance

F02.B18 is the ICD-10-CM diagnosis code for dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance. It belongs to category F02 (dementia in other diseases classified elsewhere), block F01-F09 (mental disorders due to known physiological conditions) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F02.B1, choose F02.B18 (other behavioral disturbance) only when documentation doesn't support a more specific option: agitation (F02.B11).

Code first the underlying physiological condition, such as: Alzheimer's (G30.-), cerebral lipidosis (E75.4), Creutzfeldt-Jakob disease (A81.0-), epilepsy and recurrent seizures (G40.-) and 20 more.

Use an additional code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 884 (Organic Disturbances and Intellectual Disability, relative weight 1.6001), in MDC 19 (Mental Diseases and Disorders), 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 a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

It was added in FY2023, effective October 1, 2022.