2023

  1. ICD-10-CM Codes
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  2. R00-R99
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  3. R40-R46
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  4. R46-
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  5. 2023 ICD-10-CM Diagnosis Code R46.2

2023 ICD-10-CM Diagnosis Code R46.2

Strange and inexplicable behavior

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • R46.2 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 R46.2 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of R46.2 - other international versions of ICD-10 R46.2 may differ.
The following code(s) above R46.2 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 R46.2:
  • R00-R99
    2023 ICD-10-CM Range R00-R99

    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

    Note
    • This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
    • Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
    • The conditions and signs or symptoms included in categories R00-R94 consist of:
    • (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
    • (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
    • (c) provisional diagnosis in a patient who failed to return for further investigation or care;
    • (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
    • (e) cases in which a more precise diagnosis was not available for any other reason;
    • (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
    Type 2 Excludes
    • abnormal findings on antenatal screening of mother (O28.-)
    • certain conditions originating in the perinatal period (P04-P96)
    • signs and symptoms classified in the body system chapters
    • signs and symptoms of breast (N63, N64.5)
    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
  • R40-R46
    2023 ICD-10-CM Range R40-R46

    Symptoms and signs involving cognition, perception, emotional state and behavior

    Type 2 Excludes
    • symptoms and signs constituting part of a pattern of mental disorder (F01-F99)
    Symptoms and signs involving cognition, perception, emotional state and behavior
  • R46
    ICD-10-CM Diagnosis Code R46

    Symptoms and signs involving appearance and behavior

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • appearance and behavior in schizophrenia, schizotypal and delusional disorders (F20-F29)
    • mental and behavioral disorders (F01-F99)
    Symptoms and signs involving appearance and behavior
ICD-10-CM R46.2 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 951 Other factors influencing health status

Convert R46.2 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 R46.2:
  • Behavior
    • inexplicable R46.2
    • strange R46.2 (and inexplicable)

ICD-10-CM Codes Adjacent To R46.2
R45.85 Homicidal and suicidal ideations
R45.850 Homicidal ideations
R45.851 Suicidal ideations
R45.86 Emotional lability
R45.87 Impulsiveness
R45.88 Nonsuicidal self-harm
R45.89 Other symptoms and signs involving emotional state
R46 Symptoms and signs involving appearance and behavior
R46.0 Very low level of personal hygiene
R46.1 Bizarre personal appearance
R46.2 Strange and inexplicable behavior
R46.3 Overactivity
R46.4 Slowness and poor responsiveness
R46.5 Suspiciousness and marked evasiveness
R46.6 Undue concern and preoccupation with stressful events
R46.7 Verbosity and circumstantial detail obscuring reason for contact
R46.8 Other symptoms and signs involving appearance and behavior
R46.81 Obsessive-compulsive behavior
R46.89 Other symptoms and signs involving appearance and behavior
R47 Speech disturbances, not elsewhere classified
R47.0 Dysphasia and aphasia

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

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