K09 Cysts of oral region, not elsewhere classified

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Cysts of oral region, not elsewhere classified is K09 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
K00-K14: Diseases of oral cavity and salivary glands (K00-K14)
Category K09
5 codes (4 billable)
FY2026 Status
Stable since FY2024
Includes
  • lesions showing histological features both of aneurysmal cyst and of another fibro-osseous lesion
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • cysts of jaw (M27.0-, M27.4-)
  • radicular cyst (K04.8)

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.11

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

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

Related Codes in 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
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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