1. ICD-10-CM Codes
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2. F01-F99
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3. F10-F19
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4. F16-
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5. 2023 ICD-10-CM Diagnosis Code F16.121

2023 ICD-10-CM Diagnosis Code F16.121

Hallucinogen abuse with intoxication with delirium

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• F16.121 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM F16.121 became effective on October 1, 2022.
• This is the American ICD-10-CM version of F16.121 - other international versions of ICD-10 F16.121 may differ.

• 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 F16.121 to ICD-9-CM

• 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

• Abuse
  • drug NEC (non-dependent) F19.10
    ICD-10-CM Diagnosis Code F19.10

    Other psychoactive substance abuse, uncomplicated

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Other (or unknown) substance use disorder, mild
    • hallucinogen F16.10
      ICD-10-CM Diagnosis Code F16.10

      Hallucinogen abuse, uncomplicated

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Other hallucinogen use disorder, mild
      • Phencyclidine use disorder, mild
      • with
        • intoxication F16.129
          ICD-10-CM Diagnosis Code F16.129

          Hallucinogen abuse with intoxication, unspecified

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
          • with
            • delirium F16.121
• 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
  • due to (secondary to)
    • hallucinogen intoxication F16.921
      ICD-10-CM Diagnosis Code F16.921

      Hallucinogen use, unspecified with intoxication with delirium

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Other hallucinogen intoxication delirium
      • in
        • abuse F16.121
    • phencyclidine intoxication (acute) F16.921
      ICD-10-CM Diagnosis Code F16.921

      Hallucinogen use, unspecified with intoxication with delirium

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Other hallucinogen intoxication delirium
      • in
        • abuse F16.121
• Disorder (of) - see also Disease
  • hallucinogen use
    • mild F16.10
      ICD-10-CM Diagnosis Code F16.10

      Hallucinogen abuse, uncomplicated

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Other hallucinogen use disorder, mild
      • Phencyclidine use disorder, mild
      • with
        • hallucinogen intoxication delirium F16.121
  • phencyclidine use
    • mild F16.10
      ICD-10-CM Diagnosis Code F16.10

      Hallucinogen abuse, uncomplicated

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Other hallucinogen use disorder, mild
      • Phencyclidine use disorder, mild
      • with
        • phencyclidine intoxication delirium F16.121

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