Sinusitis ICD-10-CM codes

Acute sinusitis is J01, subdivided by sinus: J01.0- maxillary, J01.1- frontal, J01.2- ethmoidal, J01.3- sphenoidal, J01.4- pansinusitis, J01.8- other, and J01.9- unspecified. The fifth character is 0 for a single acute episode and 1 for acute recurrent sinusitis, so J01.90 is acute sinusitis unspecified and J01.01 is acute recurrent maxillary sinusitis.

Chronic sinusitis is J32 and has no recurrent split: J32.0 maxillary, J32.1 frontal, J32.2 ethmoidal, J32.3 sphenoidal, J32.4 pansinusitis, J32.8 other, and J32.9 unspecified. Sinusitis NOS without acute or chronic indexes to J32.9. Acute on chronic sinusitis is coded with both a J01 and a J32 code, which the Excludes2 notes permit.

Both categories instruct coders to add a B95 to B97 code for the infectious agent when it is documented. Structural findings that contribute to sinusitis, such as deviated nasal septum (J34.2) or nasal polyps (J33.9), are coded separately when documented.