J01.21
ICD-10-CMThis code signifies an acute inflammatory process affecting the ethmoid sinuses that occurs repeatedly after periods of remission. It describes a distinct episode of acute sinusitis localized to the ethmoid air cells, in a patient with a history of prior acute ethmoidal sinus infections.
Use this code when documentation clearly indicates an acute exacerbation of ethmoidal sinusitis in a patient with a history of recurrent acute episodes. The physician's notes should specify both the acute nature of the current episode and the recurrent pattern of the condition.
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