All ICD10 Codes

K04.8

Billable
ChapterK00–K95
Ranksubcategory
Official Description

Radicular cyst

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

Instructional Notes

Includes
  • Apical (periodontal) cyst
  • Periapical cyst
  • Residual radicular cyst
Excludes2(Not included here)
  • lateral periodontal cyst (K09.0)
General instructions are available for the parent sections:
View CH11 Notes

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
K04.8Radicular cyst

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K04.8:

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

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to K04.8. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

9 raw paths
Cyst (colloid) (mucous) (simple) (retention)9 unique routes
apical (tooth) (periodontal)→K04.8
dental (root)→K04.8
mandible
radicular→K04.8
maxilla
radicular→K04.8
periapical→K04.8
periodontal→K04.8
radicular (residual)→K04.8
radiculodental→K04.8
residual (radicular)→K04.8

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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