Is F03.C18 a billable ICD-10-CM code?

Yes. F03.C18 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does F03.C18 sit in the tabular list?

Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mental disorders due to known physiological conditions (F01-F09).

F03.C18

F03.C18 — Unspecified dementia, severe, with other behavioral disturbance

Billable / specific codeICD-10-CM

F03.C18 is a billable, specific ICD-10-CM code for unspecified dementia, severe, with other behavioral disturbance. It is valid for submission on a claim.

Use additional code

Add a secondary code to capture the detail described below.

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

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

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

Risk adjustment

F03.C18 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 125 Dementia, Severe0.341 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

F03.C18 is named in 14 Medicare coverage policies — 13 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
A53134Billing and Coding: NCD Coding Article for Positron Emission Tomography (PET) Scans Used for Non-Oncologic Conditions
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56416Billing and Coding: Assays for Vitamins and Metabolic Function

How F03.C18 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to F03.C18.

Dementia›severe›with›behavioral disturbances(sexual disinhibition) (sleep disturbance) (social disinhibition)
Dementia›severe›with›behavioral disturbances›specified NEC

Related codes at this level

Codes that share F03.C1. If F03.C18 is not quite right, the correct code is usually one of these.

F03.C11Unspecified dementia, severe, with agitation

Questions about F03.C18

Is F03.C18 a billable ICD-10-CM code?: Yes. F03.C18 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does F03.C18 sit in the tabular list?: Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mental disorders due to known physiological conditions (F01-F09).