Chronic apical periodontitis

This code represents a persistent, long-standing inflammation and infection of the tissues surrounding the apex (tip) of a tooth root, typically caused by bacterial invasion from a necrotic dental pulp. It is characterized by a periapical radiolucency visible on radiographs, indicating bone destruction.

Use this code when documentation confirms a diagnosis of chronic apical periodontitis, often identified through radiographic evidence of a periapical lesion (e.g., granuloma, cyst) in conjunction with symptoms like mild pain, sensitivity to percussion, or a history of pulp necrosis. Supporting documentation includes dental radiographs, clinical examination findings, and a dental history indicating a chronic process.

• Differentiate from acute apical periodontitis, which presents with more severe symptoms and rapid onset.
• Ensure the documentation clearly specifies "chronic" to avoid confusion with other periapical conditions.
• Remember the Excludes1 note: do not code with K05.3- (chronic periodontitis), as these are distinct conditions affecting different parts of the tooth's supporting structures.