Gulf war illness, initial encounter

This code identifies a constellation of chronic, unexplained symptoms experienced by veterans of the 1990-1991 Persian Gulf War. These symptoms often include fatigue, widespread pain, cognitive dysfunction, gastrointestinal issues, and skin problems, without a clear medical explanation. It represents a complex, multi-system disorder.

This code is used when a healthcare provider is initially evaluating a veteran with symptoms consistent with Gulf War illness. It applies to the first encounter where this diagnosis is being considered or established. Subsequent encounters for ongoing management would utilize a different encounter character.

• Ensure documentation clearly links the patient's symptoms to service in the Persian Gulf War.
• This code is for the initial encounter; subsequent visits for established Gulf War illness will require a different seventh character.
• Always code all co-occurring symptoms and conditions that are documented, in addition to this code.