Acute apical periodontitis of pulpal origin

This code signifies an acute inflammatory process affecting the periapical tissues surrounding the root apex of a tooth, directly resulting from an infection or irritation originating within the tooth's pulp. It typically presents with severe pain, sensitivity to percussion, and often radiographic evidence of periapical radiolucency.

Apply this code when documentation clearly indicates an acute inflammatory response at the tooth apex, specifically attributed to pulpal pathology (e.g., irreversible pulpitis, pulpal necrosis). Supporting documentation includes clinical findings like localized tenderness to percussion, spontaneous pain, and vitality testing results consistent with pulpal involvement.

• Differentiate from chronic apical periodontitis, which would use a different code.
• Ensure the documentation explicitly links the apical periodontitis to a pulpal origin.
• Consider co-reporting with codes for the underlying pulpal condition (e.g., irreversible pulpitis) if separately documented and treated.