F16.9

Header — not billable

Hallucinogen use, unspecified

The ICD-10 code for hallucinogen use, unspecified is F16.9.

F16.9 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 7 more specific codes below.

Clinical notes

Excludes1 (not coded here)

An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).

hallucinogen abuse (F16.1-)
hallucinogen dependence (F16.2-)

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
•This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
•Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Child codes under F16.9

Related codes in this category

F16.1Hallucinogen abusenon-billable header
F16.2Hallucinogen dependencenon-billable header
F16.9Hallucinogen use, unspecifiednon-billable header