F18.90 — Inhalant use, unspecified, uncomplicated
F18.90 is a billable, specific ICD-10-CM code for inhalant use, unspecified, uncomplicated. It is valid for submission on a claim.
Risk adjustment
F18.90 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
F18.90 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
- A54799Billing and Coding: Urine Drug Testing
- A55001Billing and Coding: Urine Drug Testing
- A56645Billing and Coding: Controlled Substance Monitoring and Drugs of Abuse Testing
How F18.90 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 F18.90.
- Use›inhalants
- Use›volatile solvents
Related codes at this level
Codes that share F18.9. If F18.90 is not quite right, the correct code is usually one of these.
- F18.91Inhalant use, unspecified, in remission
- F18.92Inhalant use, unspecified with intoxication
- F18.94Inhalant use, unspecified with inhalant-induced mood disorder
- F18.95Inhalant use, unspecified with inhalant-induced psychotic disorder
- F18.97Inhalant use, unspecified with inhalant-induced persisting dementia
- F18.98Inhalant use, unspecified with other inhalant-induced disorders
- F18.99Inhalant use, unspecified with unspecified inhalant-induced disorder
Questions about F18.90
- Is F18.90 a billable ICD-10-CM code?
- Yes. F18.90 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does F18.90 sit in the tabular list?
- Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Mental and behavioral disorders due to psychoactive substance use (F10-F19).