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K04.4

Billable

Acute apical periodontitis of pulpal origin

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Acute inflammation of the tissues surrounding the root tip of a tooth, caused by infection or irritation from the tooth pulp.

Coding Tips

  • •Acute apical periodontitis originates from pulpal pathology; document the causative tooth and associated symptoms
  • •Differentiate from chronic apical periodontitis (K04.5) based on symptom duration and clinical presentation

Excludes 1 — Do NOT code together

  • acute periodontitis (K05.2-)

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