ICD-10-CM 2027
ICD-10 code for Neuromyasthenia
From the official ICD-10-CM alphabetic index entry “Neuromyasthenia (epidemic) (postinfectious)”. Page updated September 29, 2026.
About coding Neuromyasthenia
The ICD-10-CM code for Neuromyasthenia is G93.39 (Other post infection and related fatigue syndromes).
Within G93.3, choose G93.39 (Other post infection and related fatigue syndromes) only when documentation doesn't support a more specific option: Postviral fatigue syndrome (G93.31) and Myalgic encephalomyelitis/chronic fatigue syndrome (G93.32).
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 Neuromyasthenia ICD-10 codes
What is the ICD-10 code for Neuromyasthenia?
- G93.39 — Other post infection and related fatigue syndromes.
Is G93.39 billable?
- Yes. G93.39 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G93.39 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G93.39 as a principal diagnosis.
Is G93.39 a CC or MCC?
- No. G93.39 is neither a CC nor an MCC under MS-DRG v44.0.