All ICD10 Codes
K09Not billable, use a more specific code below

Cysts of oral region, not elsewhere classified

In Diseases of oral cavity and salivary glands (K00-K14), chapter 11: Diseases of the Digestive System

4 billable codes under K09: none are a CC or MCC; none map to an HCC.

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Instructional notes

Includes: conditions that are coded here

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

Excludes2: not included here, code separately if applicable

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

There are no chapter-specific rules for Chapter 11 yet, so the general rules in Section I.B apply.

Read Section I.C.11 (page 58)

All codes under K09

K09 can't be used on a claim. Pick a billable code below; grey headings group them.

K09 MS-DRGs

This code does not group to an MS-DRG as a principal diagnosis.

Other codes that refer to K09

Notes on these codes point to K09.

  • K13 Excludes2: cysts of oral region (K09.-)
  • M27.4 Excludes1: cysts of oral region (K09.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Mouth Disorders

Your mouth is one of the most important parts of your body. It has many different functions. It allows you to: Any problem that affects your mouth can make it hard to eat, drink, or even smile. Some common mouth problems include:

Read more about mouth disorders on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.