F16.983

Billable

Hallucinogen use, unspecified with hallucinogen persisting perception disorder (flashbacks)

HCC Category Mapping

V28HCC 137 — Drug Use Disorder/Substance Use Disorder, Moderate/Severe

0.358

V24HCC 55 — Drug/Alcohol Dependence

0.334

ESRDHCC 55 — Drug/Alcohol Dependence

0.000

What This Code Means

This code describes a person who uses hallucinogenic drugs (like LSD or psilocybin) and experiences flashbacks or recurring perceptual disturbances even when not actively using the drug. These flashbacks involve seeing, hearing, or feeling things that aren't really there, happening spontaneously without taking the drug again.

Coding Tips

•Verify documentation specifies hallucinogen use with persisting perception disorder (flashbacks) rather than other hallucinogen-related conditions like intoxication or withdrawal
•The '983' code indicates unspecified hallucinogen use; if the specific substance is documented (LSD, psilocybin, etc.), consider using more specific codes in the F16.9- range

Clinical Significance

Hallucinogen persisting perception disorder (HPPD) with unspecified use pattern captures flashback experiences — spontaneous recurrences of hallucinogenic perceptual disturbances occurring without active drug use. HPPD can be chronic and debilitating, with visual disturbances including halos, trails, geometric patterns, and intensified colors.

Documentation Requirements

✓Documentation of hallucinogen use history
✓Description of persisting perceptual disturbances occurring without current drug use
✓Types of visual or sensory disturbances experienced
✓Frequency and duration of flashback episodes
✓Impact on daily functioning and quality of life
✓Differentiation from migraine aura, seizure aura, or primary visual disorders

Commonly Confused Codes

F16.283 — Hallucinogen dependence with HPPD; preferred when dependence is documented F16.951 — Hallucinogen use with psychotic disorder with hallucinations; active psychosis vs HPPD flashbacks F16.920 — Hallucinogen use with intoxication; intoxication is acute, HPPD persists without use H53.19 — Subjective visual disturbances; does not capture substance etiology

Code Hierarchy

└F16Hallucinogen related disorders └F16.9Hallucinogen use, unspecified └F16.98Hallucinogen use, unspecified with other specified hallucinogen-induced disorder └F16.983Hallucinogen use, unspecified with hallucinogen persisting perception disorder (flashbacks)

└F16.983Hallucinogen use, unspecified with hallucinogen persisting perception disorder (flashbacks)