ICD-9 Code 304.50

Hallucinogen dependence, unspecified

Not Valid for Submission

304.50 is a legacy non-billable code used to specify a medical diagnosis of hallucinogen dependence, unspecified. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9: 304.50
Short Description:Hallucinogen dep-unspec
Long Description:Hallucinogen dependence, unspecified

Convert 304.50 to ICD-10

The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:

  • F16.20 - Hallucinogen dependence, uncomplicated

Code Classification

  • Mental disorders (290–319)
    • Neurotic disorders, personality disorders, and other nonpsychotic mental disorders (300-316)
      • 304 Drug dependence

Information for Medical Professionals

Information for Patients


Drug Abuse

Also called: Substance abuse

Drug abuse is a serious public health problem that affects almost every community and family in some way. Each year drug abuse causes millions of serious illnesses or injuries among Americans. Abused drugs include

  • Methamphetamine
  • Anabolic steroids
  • Club drugs
  • Cocaine
  • Heroin
  • Inhalants
  • Marijuana
  • Prescription drugs

Drug abuse also plays a role in many major social problems, such as drugged driving, violence, stress, and child abuse. Drug abuse can lead to homelessness, crime, and missed work or problems with keeping a job. It harms unborn babies and destroys families. There are different types of treatment for drug abuse. But the best is to prevent drug abuse in the first place.

NIH: National Institute on Drug Abuse

  • Drug abuse
  • Drug dependence
  • Methamphetamine overdose
  • Toxicology screen

[Read More]

ICD-9 Footnotes

General Equivalence Map Definitions
The ICD-9 and ICD-10 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.