ICD-10 Code F16.2 – Hallucinogen dependence (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.2 – Hallucinogen dependence
What it is
F16.2 identifies dependence on hallucinogens, meaning a pattern of repeated use with impaired control and ongoing use despite harm. You use this code when the record supports a dependence diagnosis, not just prior use.
Clinical signs
Clinical features may include strong craving, difficulty cutting down, and continued use despite social, work, or health problems. Clinical features vary; refer to documentation.
When to use this code
Use F16.2 when the clinician documents hallucinogen dependence or a dependent pattern tied to substances such as LSD, psilocybin, or similar agents. Code it when the note supports dependence criteria, even if intoxication or withdrawal is also addressed. If the record only says use, abuse, or history of use, check documentation before assigning this code.
Do not use for
Do not use F16.2 for simple hallucinogen use without dependence, acute intoxication, or unspecified substance-related problems. If the chart does not clearly document dependence, check documentation.
Coding tip
Confirm the provider’s wording; dependence must be explicit or clearly supported in the note.