ICD-10-CM 2027
ICD-10 code for ME/CFS
From the official ICD-10-CM alphabetic index entry “ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome)”. Page updated September 29, 2026.
About coding ME/CFS
The ICD-10-CM code for ME/CFS is G93.32 (Myalgic encephalomyelitis/chronic fatigue syndrome).
Within G93.3 (Postviral and related fatigue syndromes), G93.32 is specifically for Myalgic encephalomyelitis/chronic fatigue syndrome. Related codes cover Postviral fatigue syndrome (G93.31) and other post infection and related fatigue syndromes (G93.39).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 947 (Signs and Symptoms with MCC, relative weight 1.261) and DRG 948 (Signs and Symptoms without MCC, relative weight 0.7835), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about ME/CFS ICD-10 codes
What is the ICD-10 code for ME/CFS?
- G93.32 — Myalgic encephalomyelitis/chronic fatigue syndrome.
Is G93.32 billable?
- Yes. G93.32 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G93.32 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G93.32 as a principal diagnosis.
Is G93.32 a CC or MCC?
- No. G93.32 is neither a CC nor an MCC under MS-DRG v44.0.