F03.C18

Billable

ChapterF01–F99

Ranksubcategory

Official Description

Unspecified dementia, severe, with other behavioral disturbance

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (F01-F99).

Instructional Notes

Includes

Unspecified dementia, severe, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition

Use Additional Code

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

General instructions are available for the parent sections:

View CH5 Notes View F03 Notes

Clinical Hierarchy

CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

F01-F09Mental disorders due to known physiological conditions (F01-F09)

F03Unspecified dementia

F03.CUnspecified dementia, severe

F03.C1Unspecified dementia, severe, with behavioral disturbance

F03.C18Unspecified dementia, severe, with other behavioral disturbance

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to F03.C18:

categoryF03

Unspecified dementia

View context instructions

chapterCH5

Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to F03.C18. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)2 unique routes

severe(2 variants)

with(2 variants)

behavioral disturbances (sexual disinhibition) (sleep disturbance) (social disinhibition)→F03.C18(2 variants)

specified NEC→F03.C18

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 884

Organic Disturbances and Intellectual Disability

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Unspecified dementia, severe, with other behavioral disturbance.

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