FY2027 ICD-10-CM reference
F16.9: Hallucinogen use, unspecified
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Hallucinogen use, unspecified. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- F16.90: Hallucinogen use, unspecified, uncomplicatedBillable code
- F16.91: Hallucinogen use, unspecified, in remissionBillable code
- F16.92: Hallucinogen use, unspecified with intoxicationNonbillable heading
- F16.94: Hallucinogen use, unspecified with hallucinogen-induced mood disorderBillable code
- F16.95: Hallucinogen use, unspecified with hallucinogen-induced psychotic disorderNonbillable heading
- F16.98: Hallucinogen use, unspecified with other specified hallucinogen-induced disorderNonbillable heading
- F16.99: Hallucinogen use, unspecified with unspecified hallucinogen-induced disorderBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Includes
disorders of psychological development
Source: F01-F99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Source: F01-F99 (chapter, inherited).
Includes
ecstasy
Source: F16 (category, inherited).
Includes
PCP
Source: F16 (category, inherited).
Includes
phencyclidine
Source: F16 (category, inherited).
Excludes1
hallucinogen abuse (F16.1-)
Source: F16.9 (self, direct).
Excludes1
hallucinogen dependence (F16.2-)
Source: F16.9 (self, direct).
Compare the FY2027 additions, removals and billable-status changes
What does F16.9 mean in FY2027?
The official ICD-10-CM descriptor is Hallucinogen use, unspecified. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is F16.9 billable in FY2027?
The FY2027 order file marks F16.9 as a nonbillable heading. Select a complete billable child code.
Does F16.9 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition