2026 ICD-10-CM Diagnosis Code F18.97Inhalant use, unspecified with inhalant-induced persisting dementia

ICD-10-CM Codes›F01–F99›F10-F19›F18

ICD-10-CM F18.97
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F18.97 is a billable ICD-10-CM diagnosis code for inhalant use, unspecified with inhalant-induced persisting dementia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 894 through 897. Coders also document this condition as dementia caused by volatile inhalant. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Inhalant-related disorders.

Code Identity

ICD-10-CM Code
F18.97
Billable Status
Yes — Valid for Submission
Code Describes
Inhalant use, unspecified with inhalant-induced persisting dementia
Short Description
Inhalant use, unsp with inhalant-induced persisting dementia
Parent Code
F18.9
Inhalant use, unspecified

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF10-F19Mental and behavioral disorders due to psychoactive substance use
CategoryF18Inhalant related disorders
This CodeF18.97Inhalant use, unspecified with inhalant-induced persisting dementia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dementia caused by volatile inhalant
  • Drug-induced dementia
  • Inhalant-induced persisting dementia
  • Toxic dementia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Inhalant-induced major neurocognitive disorder

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Dementia(degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
      • in (due to)
        • inhalants
    • Dementia(degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
      • in (due to)
        • psychoactive drug
          • inhalants
    • Dementia(degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)
      • in (due to)
        • volatile solvents
    • Inhalant-induced
      • major neurocognitive disorder
    • Use(of)
      • inhalants
        • with
          • persisting dementia

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD023
Inhalant-related disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Dementia

Dementia is a loss of mental functions that is severe enough to affect your daily life and activities. These functions include:

The full article covers:

  • What is dementia?
  • What are the types of dementia?
  • Who is at risk for dementia?
  • What are the symptoms of dementia?
  • How is dementia diagnosed?
  • What are the treatments for dementia?
  • Can dementia be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F18.97 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
292.82 Drug persisting dementia
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F18.97Overview

Is F18.97 (Inhalant use, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report inhalant use, unspecified with inhalant-induced persisting dementia on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does F18.97 group to?

When inhalant use, unspecified with inhalant-induced persisting dementia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 894, 895, 896, 897, with relative weights from 0.6169 to 1.7451 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F18.97?

Under the General Equivalence Mappings, inhalant use, unspecified with inhalant-induced persisting dementia converts to ICD-9-CM 292.82 (drug persisting dementia). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.