2025 ICD-10-CM Diagnosis Code K04.8

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Radicular cyst

  • K04.8 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM K04.8 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of K04.8 – other international versions of ICD-10 K04.8 may differ.

Applicable To

  • Apical (periodontal) cyst
  • Periapical cyst
  • Residual radicular cyst

Type 2 Excludes

  • lateral periodontal cyst (K09.0)

The following code(s) above K04.8 contain annotation back-references

 that may be applicable to K04.8:

  • K00-K95  Diseases of the digestive system

Clinical Information

  • Slow-growing fluid-filled epithelial sac at the apex of a tooth with a nonvital pulp or defective root canal filling.

ICD-10-CM K04.8 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 011 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with mcc
  • 012 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with cc
  • 013 Tracheostomy for face, mouth and neck diagnoses or laryngectomy without cc/mcc
  • 157 Dental and oral diseases with mcc
  • 158 Dental and oral diseases with cc
  • 159 Dental and oral diseases without cc/mcc

Convert K04.8 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Code annotations containing back-references to K04.8:

  • Type 2 Excludes: K09

Diagnosis Index entries containing back-references to K04.8:

  • Cyst (colloid) (mucous) (simple) (retention)
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