ICD-10 Code K04.1 – Necrosis of pulp (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K04.1 – Necrosis of pulp
What it is
K04.1 identifies death of the dental pulp inside a tooth. Use it when the pulp tissue is nonvital, usually after infection, trauma, or loss of blood supply.
Clinical signs
Findings commonly include a nonvital tooth, absent pulp response, and possible discoloration or history of deep caries or trauma. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents necrosis of pulp or a dead tooth pulp as the diagnosis. It may apply after endodontic evaluation, trauma, or advanced caries when the record specifically supports pulp necrosis. If the note only says tooth pain or caries, check documentation.
Do not use for
Do not use K04.1 for reversible pulpitis, apical periodontitis, or periapical abscess unless pulp necrosis is clearly documented. Do not assume necrosis from pain alone.
Coding tip
Code from the provider’s documented pulp diagnosis, not from radiology or symptoms alone.