K04.02 Irreversible pulpitis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from K04.0 Pulpitis

Applicable to

• Acute pulpitis
• Chronic (hyperplastic) (ulcerative) pulpitis

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 522.0 Pulpitis (approximate)

Diagnosis Index entries for K04.02

• Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › pulp, pulpal (dental) › irreversible
• Endodontitis › irreversible
• Infection, infected, infective (opportunistic) › tooth, teeth › pulp › irreversible
• Odontomyelitis (closed) (open) › irreversible
• Polyp, polypus › dental › irreversible
• Polyp, polypus › pulpal (dental) › irreversible
• Pulpitis (acute) (anachoretic) (chronic) (hyperplastic) (putrescent) (suppurative) (ulcerative) › irreversible

Nearby codes

• K04 Diseases of pulp and periapical tissues
• K04.0 Pulpitis
• K04.01 Reversible pulpitis
• K04.02 Irreversible pulpitis (this code)
• K04.1 Necrosis of pulp
• K04.2 Pulp degeneration
• K04.3 Abnormal hard tissue formation in pulp
• K04.4 Acute apical periodontitis of pulpal origin
• K04.5 Chronic apical periodontitis