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ICD-11 Criteria For Seasonal Pattern Of Mood Episode Onset

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Foundation URI : http://id.who.int/icd/entity/822487798

ICD-11 Criteria For Seasonal Pattern Of Mood Episode Onset

6A80.4 

Description

In the context of recurrent depressive disorder, bipolar type I or bipolar type II disorder, there has been a regular seasonal pattern of onset and remission of at least one type of episode (i.e., depressive, manic, mixed, or hypomanic episodes), with a substantial majority of the relevant mood episodes corresponding to the seasonal pattern. (In bipolar type I and bipolar type II disorder, all types of mood episodes may not follow this pattern.) A seasonal pattern should be differentiated from an episode that is coincidental with a particular season but predominantly related to a psychological stressor that regularly occurs at that time of the year (e.g., seasonal unemployment).

Diagnostic Requirements

This specifier can be applied if:

  • In the context of Bipolar Type I or Bipolar Type II Disorder there has been a regular seasonal pattern of onset and remission of at least one type of episode (i.e., Depressive, Manic, Mixed, or Hypomanic Episodes); the other types of Mood Episodes may not follow this pattern; or
  • In the context of Recurrent Depressive Disorder there has been a regular seasonal pattern of onset and remission of Depressive Episodes.
  • A substantial majority of the relevant Mood Episodes should correspond with the seasonal pattern.
  • A seasonal pattern should be differentiated from an episode that is coincidental with a particular season but predominantly related to a psychological stressor that regularly occurs at that time of the year (e.g., seasonal unemployment).

Reference:

International Classification of Diseases Eleventh Revision (ICD-11). Geneva: World Health Organization; 2022. License: CC BY-ND 3.0 IGO.
https://creativecommons.org/licenses/by-nc-nd/3.0/igo/
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