ICD-10 Code K04.3 – Abnormal Hard Tissue Formation in Pulp (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K04.3 – Abnormal hard tissue formation in pulp
What it is
K04.3 identifies abnormal hard tissue formation within the dental pulp. Use it when documentation describes calcification, pulp stones, or other hard tissue changes in the pulp chamber or root canal.
Clinical signs
Clinical features vary; refer to documentation. Findings may be incidental on dental imaging or noted during endodontic evaluation when the pulp space appears narrowed or obstructed by calcified tissue.
When to use this code
Use this code when the provider documents abnormal hard tissue formation in the pulp as the diagnosis. It may be appropriate for radiographic or clinical findings recorded during dental assessment, especially when the pulp calcification is the primary documented issue.
If the note specifies a related but different pulp disorder, code that condition instead. Check documentation when the chart only mentions calcification without clear pulp involvement.
Do not use for
Do not use K04.3 for routine dental calculus, root canal treatment findings, or hard tissue changes outside the pulp. Do not assign it when the record does not clearly identify abnormal pulp hard tissue formation.
Coding tip
Code only when the documentation links the hard tissue change to the pulp, not just to a tooth in general.