K04.3 Abnormal hard tissue formation in pulp

Billable ICD-10-CM code, FY2026.

Applicable to

• Secondary or irregular dentine

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 522.3 Abnormal hard tissue formation in pulp

Diagnosis Index entries for K04.3

• Abnormal, abnormality, abnormalities › hard tissue formation in pulp (dental)
• Anomaly, anomalous (congenital) (unspecified type) › hard tissue formation in pulp
• Dentin › irregular (in pulp)
• Dentin › secondary (in pulp)
• Irregular, irregularity › dentin (in pulp)
• Secondary › dentin (in pulp)

Nearby codes

• K04.0 Pulpitis
• K04.01 Reversible pulpitis
• K04.02 Irreversible pulpitis
• K04.1 Necrosis of pulp
• K04.2 Pulp degeneration
• K04.3 Abnormal hard tissue formation in pulp (this code)
• K04.4 Acute apical periodontitis of pulpal origin
• K04.5 Chronic apical periodontitis
• K04.6 Periapical abscess with sinus
• K04.7 Periapical abscess without sinus
• K04.8 Radicular cyst