ICD-10-CM K09: Cysts of oral region, not elsewhere classified

ICD-10-CM Diagnosis Code (2025)

Official Description for K09

Cysts of oral region, not elsewhere classified

Coding Notes & Guidelines for K09

Includes Notes

lesions showing histological features both of aneurysmal cyst and of another fibro-osseous lesion

Excludes2: Not Included Here
  • cysts of jaw (M27.0-, M27.4-)
  • radicular cyst (K04.8)
Excludes2: Not Included Here
  • keratocysts (D16.4, D16.5)
  • odontogenic keratocystic tumors (D16.4, D16.5)
Inclusion Terms
  • Dentigerous cyst
  • Eruption cyst
  • Follicular cyst
  • Gingival cyst
  • Lateral periodontal cyst
  • Primordial cyst
Inclusion Terms
  • Cyst (of) incisive canal
  • Cyst (of) palatine of papilla
  • Globulomaxillary cyst
  • Median palatal cyst
  • Nasoalveolar cyst
  • Nasolabial cyst
  • Nasopalatine duct cyst
Inclusion Terms
  • Dermoid cyst
  • Epidermoid cyst
  • Lymphoepithelial cyst
  • Epstein's pearl

Child Codes (More Specific Codes for K09):

K09.0 - Developmental odontogenic cysts K09.1 - Developmental (nonodontogenic) cysts of oral region K09.8 - Other cysts of oral region, not elsewhere classified K09.9 - Cyst of oral region, unspecified

About ICD-10-CM Code K09 (Cysts of oral region)

ICD-10-CM code K09 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM K09 became effective on October 1, 2024.

This page provides detailed information about K09 - Cysts of oral region, not elsewhere classified. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Cysts of oral region related to not elsewhere classified.