F18.9
Inhalant use, unspecified
Choose the additional character
F18.9 needs more characters to be billable. Pick the specific code below.
- F18.90Inhalant use, unspecified, uncomplicatedBillable
- F18.91Inhalant use, unspecified, in remissionBillable
- F18.92Inhalant use, unspecified with intoxicationMore levels
- F18.94Inhalant use, unspecified with inhalant-induced mood disorderBillable
- F18.95Inhalant use, unspecified with inhalant-induced psychotic disorderMore levels
- F18.97Inhalant use, unspecified with inhalant-induced persisting dementiaBillable
- F18.98Inhalant use, unspecified with other inhalant-induced disordersMore levels
- F18.99Inhalant use, unspecified with unspecified inhalant-induced disorderBillable
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
volatile solvents
disorders of psychological development
symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Official Guidelines for F18.9
FY 2026 ›Sections that reference F18.9
- I.C.5.b.3)Psychoactive Substance Use, Unspecified
… diagnoses, the codes for unspecified psychoactive substance use (F10.9-, F11.9-, F12.9-, F13.9-, F14.9-, F15.9-, F16.9-, F18.9-, F19.9-) should only be assigned based on provider documentation and when they meet the definition of a reportable diagnosis …
- I.C.5.b.1)In Remission
Selection of codes describing “in remission” for categories F10-F19, Mental and behavioral disorders due to psychoactive substance use (categories F10-F19 with -.11, -.21, -.91) requires the …
- I.C.15.l.3)Drug use during pregnancy, childbirth and the puerperiumChapter 15
… Secondary code(s) from categories F11-F16 and F18-F19 should also be assigned to identify manifestations of the drug use.
Sections whose FY 2026 text names F18.9, its F18 category, or a range containing it — the chapter guidance above is the authoritative source.