F03.A18 — Unspecified dementia, mild, with other behavioral disturbance
F03.A18 is a billable, specific ICD-10-CM code for unspecified dementia, mild, 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, mild, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
Excludes1 inherited from the categories above F03.A18
These are not written on F03.A18, but they bind it: a note on a category applies to every code beneath it. Billing F03.A18 with anything listed here is a denial.
Excludes2 inherited from the categories above F03.A18
Also inherited, and the opposite of Excludes1: these conditions are not part of F03.A18, but a patient can have both, so you may code both.
Other codes that can never be billed with F03.A18
These codes carry an Excludes1 note pointing at F03.A18. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading F03.A18 alone.
Risk adjustment
F03.A18 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 127 Dementia, Mild or Unspecified0.341 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.A18 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.A18 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.A18.
- Dementia›mild›with›behavioral disturbances(sexual disinhibition) (sleep disturbance) (social disinhibition)
- Dementia›mild›with›behavioral disturbances›specified NEC
Code history
F03.A18 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share F03.A1. If F03.A18 is not quite right, the correct code is usually one of these.
Questions about F03.A18
- Is F03.A18 a billable ICD-10-CM code?
- Yes. F03.A18 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does F03.A18 sit in the tabular list?
- Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mental disorders due to known physiological conditions (F01-F09).
- What cannot be coded together with F03.A18?
- F03.A18 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above F03.A18 (F03.A) and apply to it just the same.