ICD-10-CM 2027
ICD-10 code for Myalgic encephalomyelitis
From the official ICD-10-CM alphabetic index entry “Encephalomyelitis › myalgic”. Page updated September 29, 2026.
About coding Myalgic encephalomyelitis
The ICD-10-CM code for Myalgic encephalomyelitis is G93.32 (Myalgic encephalomyelitis/chronic fatigue syndrome). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on G93.32.
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.
More specific Myalgic encephalomyelitis codes (official index)
- chronic fatigue syndrome [ME/CFS] G93.32 — Myalgic encephalomyelitis/chronic fatigue syndrome
Common questions about Myalgic encephalomyelitis ICD-10 codes
What is the ICD-10 code for Myalgic encephalomyelitis?
- G93.32 — Myalgic encephalomyelitis/chronic fatigue syndrome. More specific codes apply when the documentation supports them: G93.32.
What is the ICD-10 code for chronic fatigue syndrome [me/cfs] myalgic encephalomyelitis?
- 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.