I find this all hard to follow. I see no particular need tp retire any terms. I am simply saying that if CFS means anything useful it means ME.
NCHS is proposing to delete
Chronic fatigue syndrome NOS (currently under R53.82 in the Symptoms, signs chapter) and to add a new ICD-10-CM term,
Chronic fatigue syndrome, under a proposed restructuring of the G93.3 terms, in the Diseases of the nervous system chapter.
(The 7 orgs have not made any recommendations for the
Chronic fatigue syndrome NOS term or for adding
Chronic fatigue syndrome under the G93.3 class due to a lack of stakeholder consensus in the past over how the
Chronic fatigue syndrome NOS term should be handled in within the frameworks of various earlier proposals for changes to the code structure, submitted between 2011 and 2018.)
The whole point of this exercise is to avoid patients being coded to the
"Chronic fatigue, unspecified" code, under which
"Chronic fatigue syndrome NOS" currently sits. There is currently no term
"Chronic fatigue syndrome" in any chapter of ICD-10-CM.
The original NCHS/CDC rationale for the current code structure (ie a
CFS NOS under R53.82 but no
CFS in either chapter location) was as follows:
"In ICD-10-CM chronic fatigue syndrome NOS (that is not specified as being due to a past viral infection) was added to ICD-10-CM in Chapter 18 at R53.82, Chronic fatigue, unspecified. ICD-10-CM retained code G93.3 to allow the differentiation of cases of fatigue syndrome where the physician has determined the cause as being due to a past viral infection from cases where the physician has not established a post viral link."
Dr Wanda Jones: If in the clinician’s judgment, it was considered there is enough evidence to attribute the patient’s illness to a viral illness onset then the clinician could code to G93.3 (Postviral fatigue syndrome). If however they could not identify where the trajectory developed toward CFS, then it would wind up in the R codes.
(It was further clarified that testing for a viral illness is not required to assign a code – that coding is based on the clinician’s judgment.)
As far as I can see in any situation where people want to change the coding structure historic coding is going to end up clashing with the new. And if physicians have been using names illogically or inappropriately, however one is thinking about improving things then historic data are to going to be comparable anyway. Better to accept that the data are not going to be helpful rather than try to preserve it.
The primary purpose of ICD-10 Tabular List and Index is collection of data, analysis and comparability of data between places and over time, not to function as a diagnostic manual.
This situation in the US is not the fault of the WHO. It arose because NCHS, who are responsible for the development, annual maintenance and updating of ICD-10-CM, bowed to pressure from Dr Bill Reeves, back in 2004.
NCHS had the option of following the WHO's ICD-10 (as Canada and Australia did) for the coding of the three terms, but chose not to.*
They have created this mess and it is their task to sort it, because they will be using ICD-10-CM for years before implementing ICD-11, or before implementing a US specific adaptation of ICD-11
(assuming the WHO will be granting copyright licenses for adaptations, which at the moment is not a given, as WHO does not like the variances that arise with modifications and is seeking to minimise the need for national adaptations of ICD-11).
This report of mine will bring you up to speed with ICD-11:
Update on classification and coding of PVFS, ME and CFS for ICD-11, November 2020:
https://dxrevisionwatch.files.wordp...fs-me-cfs-for-icd-11-version-7-nov-2020-1.pdf
*Around 25 member states have been licensed by the WHO to adapt the ICD-10 classification for the collection of morbidity (illness and disease) data and their category content and code structure varies from the WHO's unmodified ICD-10. Member states that have developed clinical modifications include: Canada, Germany, United States (also used by Belgium, Luxembourg and parts of Spain), Australia (also used by Ireland and Slovenia) and Thailand.
All modifications to ICD-10 must conform to WHO conventions for ICD.