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ICD-10-CM Code K04.8
Radicular cyst

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

K04.8 is a billable ICD code used to specify a diagnosis of radicular cyst. A 'billable code' is detailed enough to be used to specify a medical diagnosis.


The ICD code K048 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

Coding Notes for K04.8 Info for medical coders on how to properly use this ICD-10 code

Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive.
Apical (periodontal) cyst
Periapical cyst
Residual radicular cyst
Code Type-2 Excludes:
Type-2 Excludes
Type-2 Excludes means the excluded conditions are different, although they may appear similar. A patient may have both conditions, but one does not include the other. Excludes 2 means "not coded here."
Lateral periodontal cyst - instead, use code K09.0

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.

Related Concepts SNOMET-CT

  • Radicular cyst (disorder)

ICD-10-CM Alphabetical Index References for 'K04.8 - Radicular cyst'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code K04.8. Click on any term below to browse the alphabetical index.

Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)

Radicular cyst (exact match)

This is the official exact match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that in all cases where the ICD9 code 522.8 was previously used, K04.8 is the appropriate modern ICD10 code.


Parent Code: K04 - Diseases of pulp and periapical tissues

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/K048