Eosinophilia, unspecified

This code represents an elevated count of eosinophils in the blood or tissues, without further specification of the underlying cause or type. Eosinophilia is a type of leukocytosis characterized by an absolute eosinophil count exceeding normal reference ranges.

This code is appropriate when documentation indicates eosinophilia but lacks specific details regarding its etiology (e.g., parasitic infection, allergic reaction, drug-induced, or hypereosinophilic syndrome). It is used when the provider has not yet determined or documented the specific type or cause of the eosinophilia.

• Always seek further clarification from the provider if the cause of eosinophilia is known but not documented.
• Avoid using this code if a more specific diagnosis for the eosinophilia (e.g., parasitic, allergic) is documented.
• Consider sequencing this code as a secondary diagnosis if the primary reason for the encounter is the investigation or management of the underlying cause.