A77.9
ICD-10-CMThis code represents a rickettsial infection characterized by fever, headache, and a rash, where the specific type of spotted fever rickettsiosis is not identified. It indicates a systemic illness caused by bacteria transmitted by arthropod vectors, but without further diagnostic specificity.
This code is appropriate when documentation confirms a diagnosis of spotted fever, but the physician has not specified the causative organism (e.g., Rickettsia rickettsii for Rocky Mountain spotted fever, Rickettsia conorii for Mediterranean spotted fever). It should be used when the clinical picture is consistent with spotted fever, but laboratory confirmation of the specific rickettsial species is pending or unavailable.
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