All ICD10 Codes

K09

Non-Billable
ChapterK00–K95
Rankcategory
Official Description

Cysts of oral region, not elsewhere classified

Use a more specific code (4 billable)
K09.0Developmental odontogenic cystsK09.1Developmental (nonodontogenic) cysts of oral regionK09.8Other cysts of oral region, not elsewhere classifiedK09.9Cyst of oral region, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

CH11 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Instructional Notes

Includes
  • lesions showing histological features both of aneurysmal cyst and of another fibro-osseous lesion
Excludes2(Not included here. Code separately if applicable.)

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K00-K14Diseases of oral cavity and salivary glands (K00-K14)
K09Cysts of oral region, not elsewhere classifiedNot billable
K09.0Developmental odontogenic cystsBillable
K09.1Developmental (nonodontogenic) cysts of oral regionBillable
K09.8Other cysts of oral region, not elsewhere classifiedBillable
K09.9Cyst of oral region, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K09:

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

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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