2019 ICD-10-CM Diagnosis Code F16.21

Hallucinogen dependence, in remission

    2016 2017 2018 2019 Billable/Specific Code
  • F16.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM F16.21 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of F16.21 - other international versions of ICD-10 F16.21 may differ.
Applicable To
  • Other hallucinogen use disorder, moderate, in early remission
  • Other hallucinogen use disorder, moderate, in sustained remission
  • Other hallucinogen use disorder, severe, in early remission
  • Other hallucinogen use disorder, severe, in sustained remission
  • Phencyclidine use disorder, moderate, in early remission
  • Phencyclidine use disorder, moderate, in sustained remission
  • Phencyclidine use disorder, severe, in early remission
  • Phencyclidine use disorder, severe, in sustained remission
The following code(s) above F16.21 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 F16.21:
  • F01-F99
    2019 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 Non-Billable/Non-Specific Code
    Includes
    • ecstasy
    • PCP
    • phencyclidine
    Hallucinogen related disorders
  • F16.2
    ICD-10-CM Diagnosis Code F16.2

    Hallucinogen dependence

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • hallucinogen abuse (F16.1-)
    • hallucinogen use, unspecified (F16.9-)
    Hallucinogen dependence
Approximate Synonyms
  • Hallucinogen dependence (moderate use disorder), in early remission
  • Hallucinogen dependence (moderate use disorder), in sustained remission
  • Hallucinogen dependence (severe use disorder), in early remission
  • Hallucinogen dependence (severe use disorder), in sustained remission
  • Hallucinogen dependence in remission
  • Hallucinogen dependence, moderate use, in early remission
  • Hallucinogen dependence, moderate use, in sustained remission
  • Hallucinogen dependence, severe use, in early remission
  • Hallucinogen dependence, severe use, in sustained remission
  • Pcp dependence, in remission
  • Phencyclidine dependence in remission
ICD-10-CM F16.21 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 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 F16.21 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

Diagnosis Index entries containing back-references to F16.21:
  • Dependence (on) (syndrome) F19.20
    ICD-10-CM Diagnosis Code F19.20

    Other psychoactive substance dependence, uncomplicated

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Other (or unknown) substance use disorder, moderate
    • Other (or unknown) substance use disorder, severe
    • drug NEC F19.20
      ICD-10-CM Diagnosis Code F19.20

      Other psychoactive substance dependence, uncomplicated

        2016 2017 2018 2019 Billable/Specific Code
      Applicable To
      • Other (or unknown) substance use disorder, moderate
      • Other (or unknown) substance use disorder, severe
      • hallucinogen F16.20
        ICD-10-CM Diagnosis Code F16.20

        Hallucinogen dependence, uncomplicated

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Other hallucinogen use disorder, moderate
        • Other hallucinogen use disorder, severe
        • Phencyclidine use disorder, moderate
        • Phencyclidine use disorder, severe
        • in remission F16.21
  • Disorder (of) - see also Disease
    • hallucinogen use
      • moderate or severe F16.20
        ICD-10-CM Diagnosis Code F16.20

        Hallucinogen dependence, uncomplicated

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Other hallucinogen use disorder, moderate
        • Other hallucinogen use disorder, severe
        • Phencyclidine use disorder, moderate
        • Phencyclidine use disorder, severe
        • in remission F16.21 (early) (sustained)
    • phencyclidine use
      • moderate or severe F16.20
        ICD-10-CM Diagnosis Code F16.20

        Hallucinogen dependence, uncomplicated

          2016 2017 2018 2019 Billable/Specific Code
        Applicable To
        • Other hallucinogen use disorder, moderate
        • Other hallucinogen use disorder, severe
        • Phencyclidine use disorder, moderate
        • Phencyclidine use disorder, severe
        • in remission F16.21 (early) (sustained)

ICD-10-CM Codes Adjacent To F16.21
F16.150 …… with delusions
F16.151 …… with hallucinations
F16.159 …… unspecified
F16.18 Hallucinogen abuse with other hallucinogen-induced disorder
F16.180 Hallucinogen abuse with hallucinogen-induced anxiety disorder
F16.183 Hallucinogen abuse with hallucinogen persisting perception disorder (flashbacks)
F16.188 Hallucinogen abuse with other hallucinogen-induced disorder
F16.19 …… with unspecified hallucinogen-induced disorder
F16.2 Hallucinogen dependence
F16.20 …… uncomplicated
F16.21 …… in remission
F16.22 Hallucinogen dependence with intoxication
F16.220 …… uncomplicated
F16.221 …… with delirium
F16.229 …… unspecified
F16.24 …… with hallucinogen-induced mood disorder
F16.25 Hallucinogen dependence with hallucinogen-induced psychotic disorder
F16.250 …… with delusions
F16.251 …… with hallucinations
F16.259 …… unspecified
F16.28 Hallucinogen dependence 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.