Start New EnglishEspañol中文РусскийالعربيةTiếng ViệtFrançaisDeutsch한국어Tagalog Library Performance
BETA v.3.0

2025 ICD-10-CM code K04.8

Radicular cyst.A slow-growing, fluid-filled epithelial sac located at the apex of a tooth with non-vital pulp or a faulty root canal filling.

Code K04.8 should be used for radicular cysts of odontogenic origin.It excludes lateral periodontal cysts (K09.0).Accurate documentation of clinical and radiographic findings is crucial for correct coding.

Medical necessity for treatment of a radicular cyst is established by the presence of the cyst confirmed by radiographic imaging and associated clinical signs or symptoms such as pain, swelling, or infection. Treatment is necessary to prevent potential complications like expansion of the cyst, damage to adjacent teeth, or bone loss.

Diagnosis and management of radicular cysts typically fall under the purview of dentists, specifically endodontists or oral surgeons. They are responsible for identifying, diagnosing, and treating these cysts, often through root canal treatment or surgical removal.

In simple words: A radicular cyst is a small, fluid-filled sac that forms at the root of a dead tooth. It's usually painless but can sometimes cause swelling.

A radicular cyst, also known as an apical (periodontal) or periapical cyst, is a slow-growing, fluid-filled epithelial sac located at the apex of a tooth with non-vital pulp or a faulty root canal filling.It is formed as a result of inflammation and necrosis of the pulp tissue, leading to the formation of a cyst at the root tip.

Example 1: A patient presents with a persistent small swelling on the gums.Radiographic imaging reveals a well-defined radiolucency at the apex of a non-vital tooth, consistent with a radicular cyst.The dentist performs a root canal procedure to address the underlying cause., During a routine dental check-up, a periapical radiograph reveals a radicular cyst at the root of a previously treated tooth.The patient is asymptomatic.The dentist monitors the cyst and opts for surgical removal if it increases in size or causes symptoms., A patient experiences pain and swelling associated with a severely decayed tooth.Clinical and radiographic examination confirms the presence of a large radicular cyst.An oral surgeon performs an apicoectomy to remove the cyst and the affected root tip.

Documentation should include clinical findings (e.g., swelling, pain), radiographic evidence of the cyst, details of the affected tooth (e.g., non-vitality, previous root canal treatment), treatment plan (e.g., root canal therapy, apicoectomy), and any associated symptoms or complications.

** A residual radicular cyst is a radicular cyst that persists after extraction of the affected tooth.It is also coded as K04.8.

** Only Enterprise users with EHR integration can access case-specific answers. Click here to request access.

Discover what matters.

iFrame™ AI's knowledge is aligned with and limited to the materials uploaded by users and should not be interpreted as medical, legal, or any other form of advice by iFrame™.