K04.5 Chronic apical periodontitis

Billable ICD-10-CM code, FY2026.

Applicable to

• Apical or periapical granuloma
• Apical periodontitis NOS

Excludes1 (never code together)

• chronic periodontitis (K05.3-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 522.6 Chronic apical periodontitis

Code annotations containing back-references to K04.5

Back-references to K04.5

• Type 1 Excludes: K05.3 Chronic periodontitis ("chronic apical periodontitis (K04.5)")
• Type 2 Excludes: L98.0 Pyogenic granuloma ("pyogenic granuloma of maxillary alveolar ridge (K04.5)")

Diagnosis Index entries for K04.5

• Granuloma › apical
• Granuloma › dental
• Granuloma › periapical
• Granuloma › pyogenic, pyogenicum (of) (skin) › maxillary alveolar ridge
• Infection, infected, infective (opportunistic) › periapical
• Periodontitis (chronic) (complex) (compound) (local) (simplex) › apical

Nearby codes

• K04.02 Irreversible pulpitis
• 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 (this code)
• K04.6 Periapical abscess with sinus
• K04.7 Periapical abscess without sinus
• K04.8 Radicular cyst
• K04.9 Other and unspecified diseases of pulp and periapical tissues
• K04.90 Unspecified diseases of pulp and periapical tissues