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2025 ICD-10-CM code K09

Cysts of the oral region, not elsewhere classified.

* Use the most specific code possible. If additional details about the type of cyst are available, K09.0 or K09.1 should be considered.* Properly document the clinical findings to support the choice of code.* Understand the “Excludes2” notes in the code description to ensure accurate code selection.

Medical necessity for treatment is established based on the size, location, symptoms, and potential complications of the oral cyst.Large cysts can cause functional impairment (e.g., difficulty speaking or swallowing), aesthetic concerns, or risk of infection.Surgical removal or other intervention might be necessary to alleviate symptoms, prevent complications, or obtain a definitive diagnosis.

Diagnosis and management of oral cysts. This may involve clinical examination, imaging studies (e.g., radiographs), biopsy if necessary, and potentially surgical excision or other treatment based on the cyst type and size.Referral to an oral surgeon or other specialist may be indicated.

IMPORTANT:K09.0 (Developmental odontogenic cysts) and K09.1 (Developmental (nonodontogenic) cysts of oral region) are more specific subcodes that may be applicable depending on the cyst's origin and characteristics.Use of these more specific codes is preferred when possible.

In simple words: This code describes fluid-filled sacs (cysts) found in the mouth area, excluding specific types like jaw cysts or cysts related to tooth roots. These cysts can sometimes be found along with other bone or tissue issues.

This code encompasses cysts located in the oral region that do not fall under other specified categories.It includes lesions exhibiting histological characteristics of both aneurysmal cysts and other fibro-osseous lesions.This excludes cysts of the jaw (M27.0-M27.4) and radicular cysts (K04.8).

Example 1: A 35-year-old patient presents with a painless swelling on the lower lip.A clinical examination reveals a soft, fluctuant mass consistent with a mucous retention cyst.The cyst is small and asymptomatic, and the patient is monitored for changes.Code K09 is assigned., A 50-year-old patient undergoes a panoramic radiograph revealing a well-defined radiolucency in the mandibular region.A biopsy confirms the presence of an odontogenic keratocyst.The patient undergoes surgical excision of the cyst.Code K09 is assigned. If the cyst is developmental odontogenic, K09.0 would be more appropriate., A 10-year-old patient presents with a slowly growing, painless swelling on the palate. Imaging and biopsy reveal a dermoid cyst. This is surgically removed. Code K09 is used. If the developmental nature is confirmed, K09.1 would be more appropriate.

* Detailed clinical history including the location, duration, and symptoms of the cyst.* Physical examination findings documenting the size, consistency, and characteristics of the lesion.* Imaging studies (e.g., radiographs, ultrasound, CT scan) to evaluate the cyst's extent and relationship to surrounding structures.* Histopathological report confirming the diagnosis if a biopsy was performed.* Documentation of any treatment provided (e.g., surgical excision, aspiration).

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