ICD-10-CM K04: Diseases of pulp and periapical tissues

ICD-10-CM Diagnosis Code (2025)

Official Description for K04

Diseases of pulp and periapical tissues

Coding Notes & Guidelines for K04

Excludes1: Not Coded Here

acute periodontitis (K05.2-)

Excludes1: Not Coded Here

chronic periodontitis (K05.3-)

Excludes2: Not Included Here

lateral periodontal cyst (K09.0)

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

Pulpal gangrene

Inclusion Terms
  • Denticles
  • Pulpal calcifications
  • Pulpal stones
Inclusion Terms

Secondary or irregular dentine

Inclusion Terms

Acute apical periodontitis NOS

Inclusion Terms
  • Apical or periapical granuloma
  • Apical periodontitis NOS
Inclusion Terms
  • Dental abscess with sinus
  • Dentoalveolar abscess with sinus
Inclusion Terms
  • Dental abscess without sinus
  • Dentoalveolar abscess without sinus
Inclusion Terms
  • Apical (periodontal) cyst
  • Periapical cyst
  • Residual radicular cyst

Child Codes (More Specific Codes for K04):

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 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 K04.9 - Other and unspecified diseases of pulp and periapical tissues K04.90 - Unspecified diseases of pulp and periapical tissues K04.99 - Other diseases of pulp and periapical tissues

About ICD-10-CM Code K04 (Diseases of pulp and periapical tissues)

ICD-10-CM code K04 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM K04 became effective on October 1, 2024.

This page provides detailed information about K04 - Diseases of pulp and periapical tissues. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Diseases of pulp and periapical tissues.