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ICD-10-CM Code K09.9
Cyst of oral region, unspecified

BILLABLE
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

K09.9 is a billable ICD code used to specify a diagnosis of cyst of oral region, unspecified. A 'billable code' is detailed enough to be used to specify a medical diagnosis.


The ICD code K099 is used to code Cysts of the jaws

a cyst is a pathological epithelial lined cavity that fills with fluid or soft material and usually grows from internal pressure generated by fluid being drawn into the cavity from osmosis (hydrostatic pressure). the bones of the jaws, the mandible and maxilla, are the bones with the highest prevalence of cysts in the human body. this is due to the abundant amount of epithelial remnants that can be left in the bones of the jaws. the enamel of teeth is formed from ectoderm (the precursor germ layer to skin and mucosa), and so remnants of epithelium can be left in the bone during odontogenesis (tooth development). the bones of the jaws develop from embryologic processes which fuse together, and ectodermal tissue may be trapped along the lines of this fusion. this "resting" epithelium (also termed cell rests) is usually dormant or undergoes atrophy, but, when stimulated, may form a cyst. the reasons why resting epithelium may proliferate and undergo cystic transformation are generally unknown, but inflammation is thought to be a major factor. the high prevalence of tooth impactions and dental infections that occur in the bones of the jaws is also significant to explain why cysts are more common at these sites.

Specialty: Gastroenterology
Source: Wikipedia

MS-DRG Mapping

  • DRG Group #011-013 - Tracheostomy for face, mouth and neck diagnoses with MCC.
  • DRG Group #011-013 - Tracheostomy for face, mouth and neck diagnoses with CC.
  • DRG Group #011-013 - Tracheostomy for face, mouth and neck diagnoses without CC or MCC.
  • DRG Group #157-159 - Dental and oral diseases with MCC.
  • DRG Group #157-159 - Dental and oral diseases with CC.
  • DRG Group #157-159 - Dental and oral diseases without CC or MCC.

ICD-10-CM Alphabetical Index References for 'K09.9 - Cyst of oral region, unspecified'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code K09.9. Click on any term below to browse the alphabetical index.

Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)

Cysts of oral soft tissues (approximate match)

This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code K09.9 and a single ICD9 code, 528.4 is an approximate match for comparison and conversion purposes.


Parent Code: K09 - Cysts of oral region, not elsewhere classified

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/K099