2023 ICD-10-CM Diagnosis Code F16.921

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Hallucinogen use, unspecified with intoxication with delirium

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • F16.921 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Hallucinogen use, unsp with intoxication with delirium
  • The 2023 edition of ICD-10-CM F16.921 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of F16.921 - other international versions of ICD-10 F16.921 may differ.
Applicable To
  • Other hallucinogen intoxication delirium
The following code(s) above F16.921 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to F16.921:
  • F01-F99
    2023 ICD-10-CM Range F01-F99

    Mental, Behavioral and Neurodevelopmental disorders

    Includes
    • disorders of psychological development
    Type 2 Excludes
    • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
    Mental, Behavioral and Neurodevelopmental disorders
  • F16
    ICD-10-CM Diagnosis Code F16

    Hallucinogen related disorders

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Includes
    • ecstasy
    • PCP
    • phencyclidine
    Hallucinogen related disorders
  • F16.9
    ICD-10-CM Diagnosis Code F16.9

    Hallucinogen use, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Hallucinogen use, unspecified
Approximate Synonyms
  • Hallucinogen delirium
  • Hallucinogen intoxication delirium
  • Pcp delirium
  • Pcp intoxication delirium
ICD-10-CM F16.921 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 894 Alcohol, drug abuse or dependence, left ama
  • 895 Alcohol, drug abuse or dependence with rehabilitation therapy
  • 896 Alcohol, drug abuse or dependence without rehabilitation therapy with mcc
  • 897 Alcohol, drug abuse or dependence without rehabilitation therapy without mcc

Convert F16.921 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to F16.921:
  • Delirium, delirious (acute or subacute) (not alcohol- or drug-induced) (with dementia) R41.0
    ICD-10-CM Diagnosis Code R41.0

    Disorientation, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Confusion NOS
    • Delirium NOS
  • Use (of)
    • hallucinogen NEC F16.90
      ICD-10-CM Diagnosis Code F16.90

      Hallucinogen use, unspecified, uncomplicated

        2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
      • with
        • intoxication F16.929
          ICD-10-CM Diagnosis Code F16.929

          Hallucinogen use, unspecified with intoxication, unspecified

            2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
          • with
            • delirium F16.921

ICD-10-CM Codes Adjacent To F16.921
F16.28 Hallucinogen dependence with other hallucinogen-induced disorder
F16.280 Hallucinogen dependence with hallucinogen-induced anxiety disorder
F16.283 Hallucinogen dependence with hallucinogen persisting perception disorder (flashbacks)
F16.288 Hallucinogen dependence with other hallucinogen-induced disorder
F16.29 …… with unspecified hallucinogen-induced disorder
F16.9 Hallucinogen use, unspecified
F16.90 …… uncomplicated
F16.91 …… in remission
F16.92 Hallucinogen use, unspecified with intoxication
F16.920 …… uncomplicated
F16.921 …… with delirium
F16.929 …… unspecified
F16.94 …… with hallucinogen-induced mood disorder
F16.95 Hallucinogen use, unspecified with hallucinogen-induced psychotic disorder
F16.950 …… with delusions
F16.951 …… with hallucinations
F16.959 …… unspecified
F16.98 Hallucinogen use, unspecified with other specified hallucinogen-induced disorder
F16.980 Hallucinogen use, unspecified with hallucinogen-induced anxiety disorder
F16.983 Hallucinogen use, unspecified with hallucinogen persisting perception disorder (flashbacks)
F16.988 Hallucinogen use, unspecified with other hallucinogen-induced disorder

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.