Hallucign use, unsp w hallucign persist perception disorder

This code signifies a diagnosis of hallucinogen use disorder where the specific hallucinogen is not identified, and the patient is experiencing hallucinogen persisting perception disorder (HPPD), commonly known as "flashbacks." HPPD involves recurrent, spontaneous, and distressing re-experiencing of perceptual disturbances originally induced by hallucinogen use, long after the intoxicating effects have worn off.

Use this code when documentation clearly indicates a patient has a hallucinogen use disorder of an unspecified type and is concurrently experiencing persistent perceptual disturbances (flashbacks) attributable to prior hallucinogen use. This applies when the specific hallucinogen (e.g., LSD, PCP) is not documented.

• Ensure documentation explicitly states "flashbacks" or "hallucinogen persisting perception disorder" in conjunction with hallucinogen use.
• Do not use if the specific hallucinogen is known; instead, use a more specific code from the F16.x category.
• Code also any associated physical or mental health conditions, such as anxiety or depression, if documented.