F12.9Cannabis use, unspecified

F12.9 is the ICD-10-CM diagnosis code for cannabis use, unspecified. It belongs to category F12 (cannabis related disorders), block F10-F19 (mental and behavioral disorders due to psychoactive substance use) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within F12, choose F12.9 (use, unspecified) only when documentation doesn't support a more specific option: abuse (F12.1) and dependence (F12.2).

To report this condition, pick the subcode that matches the documentation: F12.90 (uncomplicated), F12.91 (in remission), F12.92 (with intoxication), F12.93 (with withdrawal), F12.95 (with psychotic disorder), F12.98 (with other cannabis-induced disorder) and F12.99 (with unspecified cannabis-induced disorder).

Don't report F12.9 together with the conditions in its Excludes1 note: cannabis abuse (F12.1-) and cannabis dependence (F12.2-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.