Arteritis, unspecified

This code represents inflammation of an artery that is not specified to a particular type or location. It indicates a general inflammatory process affecting arterial walls, without further diagnostic clarity regarding its etiology or specific vessel involvement.

Use this code when the provider's documentation clearly states "arteritis, unspecified" or describes arterial inflammation without further detail regarding the specific type (e.g., giant cell, Takayasu's) or anatomical site. This code is appropriate when a more specific diagnosis cannot be determined from the available clinical information.

• Always query the provider for a more specific type or location of arteritis if possible, as many specific forms have their own codes.
• Review the "Excludes1" notes carefully to avoid coding this with specific types of arteritis that have dedicated codes (e.g., giant cell arteritis, cerebral arteritis).
• This code should be used as a last resort when no further specificity can be obtained, reflecting the "unspecified" nature of the diagnosis.