Chronic fatigue syndrome
The proposed U.S. classification ICD-10-CM (2010 Update replaces July 2009 version) separates CFS and Postviral fatigue syndrome into mutually exclusive categories. "Chronic fatigue, unspecified | Chronic fatigue syndrome not otherwise specified" appears in Chapter XVIII under R53.82. "Postviral fatigue syndrome | benign myalgic encephalomyelitis" appears in Chapter VI under G93.3. The Chronic Fatigue Syndrome Advisory Committee (CFSAC) had previously recommended CFS to be placed under the same neurological code as ME and PVFS, G93.3.