2024 ICD-10-CM Diagnosis Code G93.31

Postviral fatigue syndrome

ICD-10-CM Code:
ICD-10 Code for:
Postviral fatigue syndrome
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Code Navigator:

Code Classification

  • Diseases of the nervous system
    • Other disorders of the nervous system
      • Other disorders of brain

G93.31 is a billable diagnosis code used to specify a medical diagnosis of postviral fatigue syndrome. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Postviral excessive daytime sleepiness
  • Postviral fatigue syndrome
  • Postviral infection debility

Clinical Classification

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Replacement Code

G9331 replaces the following previously assigned ICD-10-CM code(s):

  • G93.3 - Postviral and related fatigue syndromes
  • G93.3 - Postviral fatigue syndrome

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - Code Added, effective from 10/1/2022 through 9/30/2023


[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.