2026 ICD-10-CM Diagnosis Code K04Diseases of pulp and periapical tissues

ICD-10-CM Codes›K00–K95›K00-K14›K04

ICD-10-CM K04
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K04 is a non-billable ICD-10-CM category code for diseases of pulp and periapical tissues, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K04.01, K04.02, K04.1, and K04.2.

Code Identity

ICD-10-CM Code
K04
Billable Status
No — Non-Billable Category
Code Describes
Diseases of pulp and periapical tissues
Chapter
K00-K14
Diseases of oral cavity and salivary glands

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK00-K14Diseases of oral cavity and salivary glands
CategoryK04Diseases of pulp and periapical tissues
This CodeK04Diseases of pulp and periapical tissues

Specific Coding for Diseases of pulp and periapical tissuesOverview

Non-specific codes like K04 require more characters. Use one of these billable codes instead:

  • K04.0 for Pulpitis

  • Use K04.01 for Reversible pulpitis

  • Use K04.02 for Irreversible pulpitis

  • Use K04.1 for Necrosis of pulp

  • Use K04.2 for Pulp degeneration

  • Use K04.3 for Abnormal hard tissue formation in pulp

  • Use K04.4 for Acute apical periodontitis of pulpal origin

  • Use K04.5 for Chronic apical periodontitis

  • Use K04.6 for Periapical abscess with sinus

  • Use K04.7 for Periapical abscess without sinus

  • Use K04.8 for Radicular cyst

  • K04.9 for Other and unspecified diseases of pulp and periapical tissues

  • Use K04.90 for Unspecified diseases of pulp and periapical tissues

  • Use K04.99 for Other diseases of pulp and periapical tissues

Patient EducationClinical

Tooth Disorders

Your teeth are made of a hard, bonelike material. There are four parts:

The full article covers:

  • What are teeth?
  • What are tooth disorders?
  • What causes tooth disorders?
  • What are the symptoms of tooth disorders?
  • How are tooth disorders diagnosed?
  • What are the treatments for tooth disorders?
  • Can tooth disorders be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K04Overview

Is K04 (Diseases of pulp and periapical tissues) a billable code?

No. This is a category header that groups the codes for diseases of pulp and periapical tissues, and headers cannot be submitted on claims. Claims for diseases of pulp and periapical tissues need a more specific code from this category, such as K04.01, K04.02, and K04.1.