ICD-10 Code G93.32 – Myalgic encephalomyelitis/chronic fatigue syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G93.32 – Myalgic encephalomyelitis/chronic fatigue syndrome
What it is
G93.32 identifies myalgic encephalomyelitis/chronic fatigue syndrome, a chronic disorder marked by disabling fatigue that is not explained by routine evaluation. Use it when the diagnosis is documented and the condition is the focus of care.
Clinical signs
Commonly documented features include persistent fatigue, post-exertional symptom worsening, unrefreshing sleep, and cognitive difficulty. Clinical features vary; refer to documentation.
When to use this code
Use G93.32 when the clinician specifically diagnoses ME/CFS or documents chronic fatigue syndrome as the condition being treated or evaluated. It may also apply when the record links the patient’s ongoing functional impairment to this diagnosis. If the note only says “fatigue” without a confirmed syndrome, check documentation.
Do not use for
Do not use this code for ordinary tiredness, fatigue due to another confirmed cause, or nonspecific malaise. If the chart supports a different primary diagnosis, code that condition instead.
Coding tip
Code G93.32 only when the provider clearly establishes ME/CFS, not when fatigue is merely a symptom.