Autoinflammatory syndrome, unspecified

This code represents a broad category for conditions characterized by recurrent episodes of systemic inflammation without evidence of infection or autoimmunity, where the specific type of autoinflammatory syndrome has not been definitively diagnosed. These syndromes result from dysregulation of the innate immune system.

Use this code when documentation indicates an autoinflammatory process but lacks specificity regarding the underlying genetic mutation or specific syndrome (e.g., Familial Mediterranean Fever, Cryopyrin-Associated Periodic Syndromes). It is appropriate for initial encounters or when diagnostic workup is ongoing and a more precise diagnosis is pending.

• Avoid using this code if a more specific autoinflammatory syndrome (e.g., M04.1 for FMF) is documented.
• Query the provider for further specificity if possible, especially if genetic testing results are available.
• This code should generally be a temporary diagnosis, with efforts made to identify a more precise code as diagnostic clarity improves.