ICD-10 Code for Post-Viral Fatigue Syndrome
The ICD-10 code for post-viral fatigue syndrome is G93.3, which falls under "other disorders of the brain" in the neurological conditions chapter. 1, 2
Code Classification Details
Post-viral fatigue syndrome is classified as a neurological condition by the WHO under ICD-11 code 8E49, though the ICD-10 equivalent remains G93.3. 1
This code encompasses chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) and is listed as a sub-category under chapter G93 (other disorders of the brain). 2
The classification explicitly designates this as Post Viral Fatigue Syndrome (PVFS) in the WHO International Classification of Diseases. 2
Clinical Context for Coding
Post-viral fatigue syndrome manifests as persistent fatigue, cognitive difficulties, and post-exertional malaise following viral infections. 1 The syndrome includes:
- Disabling fatigue lasting beyond typical recovery timeframes 1
- Musculoskeletal pain and neurocognitive difficulties 3
- Mood disturbance and unrefreshing sleep 1
- Autonomic dysfunction 1
Important Coding Considerations
The diagnosis requires exclusion of other medical conditions, including psychiatric disorders, before applying this code. 2 Key diagnostic criteria include:
- Symptoms must persist beyond 4 weeks after mild acute infection (rather than waiting 12 weeks as some definitions suggest). 4
- For post-Q fever fatigue syndrome specifically, symptoms must persist >1 year after symptomatic acute infection with elevated antibody titers and no organ involvement. 4
- The fatigue must not have developed before other symptoms. 2