K04

Non-Billable
ChapterK00–K95
Rankcategory
Official Description

Diseases of pulp and periapical tissues

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

CH11 Parent Instructions

Excludes2(Not included here)
  • 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)

Clinical Hierarchy

CH11Diseases of the digestive system (K00-K95)
K00-K14Diseases of oral cavity and salivary glands (K00-K14)
K04Diseases of pulp and periapical tissues
K04.0Pulpitis
K04.1Necrosis of pulp
K04.2Pulp degeneration
K04.3Abnormal hard tissue formation in pulp
K04.4Acute apical periodontitis of pulpal origin
K04.5Chronic apical periodontitis
K04.6Periapical abscess with sinus
K04.7Periapical abscess without sinus
K04.8Radicular cyst
K04.9Other and unspecified diseases of pulp and periapical tissues

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K04:

chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to K04. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Abnormal, abnormality, abnormalities1 unique routes
hard tissue formation in pulp (dental)→K04
Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)24 unique routes
alveolar→K04(2 variants)
with sinus→K04
apical (tooth)→K04(2 variants)
with sinus (alveolar)→K04
dental→K04(2 variants)
with sinus (alveolar)→K04
dentoalveolar→K04(2 variants)
with sinus→K04
lateral (alveolar)→K04(2 variants)
with sinus→K04
maxilla, maxillary(3 variants)
molar (tooth)→K04(2 variants)
with sinus→K04
premolar→K04
periapical→K04(2 variants)
with sinus (alveolar)→K04
periodontal (parietal)
apical→K04
pulp, pulpal (dental)→K04(3 variants)
irreversible→K04
reversible→K04
root, tooth→K04(2 variants)
with sinus (alveolar)→K04
septal, dental→K04(2 variants)
with sinus (alveolar)→K04
tooth, teeth (root)→K04

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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