2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Diseases of pulp and periapical tissues
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K04: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K04Overview

What is the ICD-10 code for diseases of pulp and periapical tissues?

K04 is the ICD-10-CM category for diseases of pulp and periapical tissues, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.