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ICD10BillableValid for clinical use

ICD-10 Code K04.8: Radicular cyst

K04.8 is a billable ICD-10 diagnosis code used to classify Radicular cyst in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).

When is it used?

  • May be used when a clinician documents radicular cyst in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
11Diseases of the digestive system (K00-K95)
block
K00-K14Diseases of oral cavity and salivary glands
category
K04Diseases of pulp and periapical tissues
currentK04

Official coding notes

Inclusion terms
  • Apical (periodontal) cyst
  • Periapical cyst
  • Residual radicular cyst
Excludes2 (may code together if documented)
  • lateral periodontal cyst (K09.0)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

GastroenterologistGeneral Physician

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
K04.8

Common synonyms

Radicular cyst

Frequently asked questions

Code details

CodeK04.8
SystemICD10
Display nameRadicular cyst
ChapterDiseases of the digestive system (K00-K95)
BlockDiseases of oral cavity and salivary glands

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)Cyst(colloid) (mucous) (simple) (retention)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.