Thank you, Suzy and @Medfeb.
To me, personally, it makes sense to separate CFS/CF from ME. So to me, the US classification makes sense, because - historically, after reading "Osler's Web" - CFS was meant as a synonym for CF, and if I understand correctly, that's what the US ICD says. (Although I can't imagine that's the US viewpoint?)
But the US deviates here from WHO ICD10, right? The other countries remain closer to WHI ICD10?
So does the US follow the IOM proposal, and "preferring" the word ME, or is this to be interpreted as an "intermediate step" in putting ME+CFS in the symptoms and signs chapter, as suggested by Dua?
@Inara - The ICD-10-CM and disease name situation in the US is an mess. Historically, US medical education providers and doctors have used the term CFS even when the patient meets the CCC or the ME-ICC. But CFS is equated to the symptom of chronic fatigue so that impacts medical perception, insurance reimbursement and the ability to use medical records for research. The US is the only country to have equated CFS to CF. Every other country has it in the neurological chapter and it needed to be moved out of the symptom chapter.
Regarding SEID - HHS does not "approve" disease names - the medical community does. So while HHS and some medical education providers have adopted the term "ME/CFS," a few medical education providers have incorporated the term SEID. So when doctors write the term "SEID" in a medical record, SEID would need to have a code in the ICD-10-CM.
If SEID is to be added to the ICD-10-CM, the two options are 1) to add SEID as an inclusion under either CFS or ME or 2) to give SEID a separate code. The IOM was clear that SEID is narrower than CFS and various papers have discussed it being broader then ME as defined by the CCC or the ME-ICC. So including it under either CFS or ME would not be appropriate.
Besides for the SEID term issue, we also have a challenge when doctors use the term "ME/CFS." As I understand it, the coder will have to apply both the CFS and the ME codes to the medical record. Its unclear what impact that will have on reimbursement but if will impact research using medical records.
Ughh