F18.1 vs F18.2
F18.1 (Inhalant abuse) compared with F18.2 (Inhalant dependence), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. F18.1 carries an Excludes1 note covering F18.2: “inhalant dependence (F18.2-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. F18.2 carries an Excludes1 note covering F18.1: “inhalant abuse (F18.1-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| F18.1Inhalant abuse | F18.2Inhalant dependence | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) |
| Definition | Inhalant abuse is a non-billable ICD-10-CM category code (F18.1). | Inhalant dependence is a non-billable ICD-10-CM category code (F18.2). |
| Includes | volatile solvents | volatile solvents |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources