ICD-10: ME, CFS
Part Two
ICD-10 Chapter V: Mental and Behavioural Disorders
(In ICD-11, this chapter is known as “Chapter 06”.)
ICD-10 Chapter V is also published as a specialty publication known as the “Blue Book” and is available as a PDF. This expands on the brief disorder descriptions in the Tabular List and includes diagnostic guidelines.
ICD-10 Classification of Mental and Behavioural Disorders Clinical descriptions and diagnostic guidelines: http://www.who.int/classifications/icd/en/bluebook.pdf
This is how “Fatigue syndrome” and “Neurasthenia” are classified in ICD-10 Chapter V:
Tabular List ICD-10 Version: 2019
Note the exclusion of Malaise and fatigue ( R53 ) and Postviral fatigue syndrome ( G93.3 ).
(Please refer to the “Blue Book” and to ICD-10 Online Version: 2019 for full categories, category descriptions, inclusions and exclusions.)
https://icd.who.int/browse10/2019/en#/F45
Chapter V
Mental and behavioural disorders
(F00-F99)
Neurotic, stress-related and somatoform disorders
(F40-F48)
[…]
F45 Somatoform disorders
F45.0 Somatization disorder
F45.1 Undifferentiated somatoform disorder
F45.8 Other somatoform disorders
F45.9 Somatoform disorder, unspecified
Psychosomatic disorder NOS
F48 Other neurotic disorders
F48.0 Neurasthenia [Ed: Lengthy textual description of symptoms for neurasthenia omitted]
Fatigue syndrome [Ed: Note: not “postviral”; not “chronic”]
Use additional code, if desired, to identify previous physical illness.
Excludes: asthenia NOS (R53)
burn-out (Z73.0)
malaise and fatigue (R53)
postviral fatigue syndrome (G93.3)
psychasthenia (F48.8)
Correspondence between DSM-IV and ICD-10
There was a degree of correspondence between the DSM-IV Somatoform Disorders categories and the equivalent disorder section in ICD-10: Chapter V. This table sets out how the two classification systems corresponded for Somatoform Disorders [1].
(The now retired) DSM-IV Codes and Categories for Somatoform Disorders and the ICD-10 Equivalents:
[1] Source: Mayou R, Kirmayer LJ, Simon G, Kroenke K, Sharpe M: Somatoform disorders: time for a new approach in DSM-V. Am J Psychiat. 2005;162:847–855. [Neurasthenia (classified in ICD-10: Chapter V at F48.0) is not categorized in DSM-IV.]
ICD-10 Chapter XVIII
(In ICD-11, this chapter will be known as “Chapter 21”.)
Note the following classifications under R53 Malaise and fatigue. See “Notes” regarding R53.82 and US ICD-10-CM.
Note exclusion of Fatigue syndrome (F48.0) and Postviral fatigue syndrome (G93.3).
https://icd.who.int/browse10/2019/en#/R53
Chapter XVIII
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
(R00-R99)
General symptoms and signs
(R50-R69)
[…]
R53 Malaise and fatigue
Asthenia NOS
Debility:
· NOS
· chronic
· nervous
General physical deterioration
Lethargy
Tiredness
Excludes: debility:
· congenital (P96.9)
· senile (R54)
exhaustion and fatigue (due to)(in):
· combat (F43.0)
· excessive exertion (T73.3)
· exposure (T73.2)
· heat (T67.-)
· neurasthenia (F48.0)
· pregnancy (O26.8 )
· senile asthenia (R54)
fatigue syndrome (F48.0)
· postviral (G93.3)
ICD-11
For the most recent information on classification and coding of Postviral fatigue syndrome; Myalgic encephalomyelitis; and Chronic fatigue syndrome in ICD-10 and ICD-11 see my November 2020 report:
Update on classification and coding of PVFS, ME and CFS for ICD-11, v7 | November 2020
Content in ICD-11 will be populated for parameters, in accordance with the ICD-11 Content Model Style Guide. There is the potential for considerably more content to be included for diseases, disorders and syndromes in ICD-11 than appears in ICD-10, including Descriptions.
dx revision watch 