Thought I'd mention, here, that for ICD-11, Fibromyalgia has been relocated from its ICD-10 legacy chapter location (Chapter: XIII
Diseases of the musculoskeletal system or connective tissue) to ICD-11's
Symptoms, signs chapter:
(and you need to drill a long way down)
https://icd.who.int/dev11/f/en#/http://id.who.int/icd/entity/236601102
ICD-11 Foundation
Chapter 21: Symptoms, signs or clinical findings, not elsewhere classified
> General symptoms, signs or clinical findings
>> General symptoms
>>> Pain
>>>> Chronic pain
>>>>> Chronic primary pain
>>>>>> Chronic widespread pain
>>>>>>> Fibromyalgia
The ICD-11 MMS (Mortality and Morbidity Statistics) Linearization is the ICD-11 equivalent to ICD-10's Tabular List.
Concept term Fibromyalgia is not discretely coded for in the MMS Linearization.
Instead, Fibromyalgia is rolled up as an Inclusion term under
MG40.01 Chronic widespread pain
so it takes the same code as concept "MG40.01 Chronic widespread pain".
Screenshot to show hover text indicating that Fibromyalgia is not included in the MMS Linearization as a discretely coded for entity, but as an Inclusion under concept, Chronic widespread pain:
https://icd.who.int/dev11/l-m/en#/http://id.who.int/icd/entity/849253504
ICD-11 MMS (Mortality and Morbidity Statistics) Linearization
Chapter 21: Symptoms, signs or clinical findings, not elsewhere classified
> General symptoms, signs or clinical findings
>> General symptoms
>>> Pain
>>>> MG40 Chronic pain
>>>>> MG40.0 Chronic primary pain
>>>>>> MG40.01 Chronic widespread pain
Note the Description for the new parent block "Chronic primary pain":
https://icd.who.int/dev11/f/en#/http://id.who.int/icd/entity/1326332835
Description
Chronic primary pain is chronic pain in one or more anatomical regions that is characterized by significant emotional distress (anxiety, anger/frustration or depressed mood) or functional disability (interference in daily life activities and reduced participation in social roles). Chronic primary pain is multifactorial: biological, psychological and social factors contribute to the pain syndrome. The diagnosis is appropriate independently of identified biological or psychological contributors unless another diagnosis would better account for the presenting symptoms. Other chronic pain diagnoses to be considered are chronic cancer-related pain, chronic postsurgical or posttraumatic pain, chronic neuropathic pain, chronic secondary headache or orofacial pain, chronic secondary visceral pain and chronic secondary musculoskeletal pain.
which is characteristically close to ICD-11's BDD descriptions.
In fact, Antonia Barke of the
IASP Task Force on Classification of Chronic Pain (an NGO in official relationship with WHO, Chairmen: Rolf-Detlef Treede and Winfried Rief) had suggested, at one point, that consideration should be given to secondary parenting BDD to the new "Chronic primary pain" parent block, which might be considered a repository for so-called "functional disorders" for which chronic pain is the predominate feature.
There have been virtually no comments on this proposal (which will go through in June) from the Fibro "community". Though several Fibro groups have been made aware of this chapter relocation and new parent block.
If you really want to have your blood chilled, this slide presentation dating from 2012, sets out earlier (now superseded) proposals by IASP Chair, Winfried Rief:
https://www.sip-platform.eu/files/structure_until_2016/Symposia/SIP 2012 Programme/Workshop 1/Presentations/03_Winfried Rief_Copenhagen EFIC Pain Rief 2012.pdf
See Slides #13 to 15:
Potential partners in a new chapter: (Other) functional somatic conditions