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2025 ICD-10-CM code M27.4

Other and unspecified cysts of the jaw. These are abnormal lesions of the jawbone containing fluid, typically blood or serum, and usually lacking the epithelial lining characteristic of a true cyst.

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition. Excludes2: arthropathic psoriasis (L40.5-) certain conditions originating in the perinatal period (P04-P96) certain infectious and parasitic diseases (A00-B99) compartment syndrome (traumatic) (T79.A-) complications of pregnancy, childbirth and the puerperium (O00-O9A) congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Medical necessity is established by the presence of signs and symptoms related to the cyst, such as pain, swelling, or functional impairment. Diagnostic imaging results confirming the presence of the cyst are crucial.

Diagnosis involves imaging techniques (X-rays, CT scans) and aspiration of cyst fluid. Treatment may include cyst removal, drainage, or curettage.

In simple words: This code refers to cysts in the jawbone that are not otherwise specified. These cysts are abnormal fluid-filled sacs, often containing blood or serum, that form within the jawbone. They usually don't have the typical lining of a regular cyst. This code is used when the specific type of jaw cyst is not known or not documented.

This code encompasses cysts of the jaw that are identified by the provider but not specifically classified elsewhere, as well as unspecified cysts where the type is not documented.It includes non-epithelial cysts (pseudocysts) such as traumatic or solitary bone cysts. Excludes1: cysts of oral region (K09.-) latent bone cyst of jaw (M27.0) Stafne's cyst (M27.0)

Example 1: A patient presents with a lump in their jaw. Imaging reveals a fluid-filled lesion, but the specific type of cyst is undetermined. M27.4 is used., Following a traumatic injury to the jaw, a patient develops a solitary bone cyst. M27.4 would be the appropriate code., A patient reports pain and swelling in the jaw. A CT scan identifies a cyst, but the provider does not specify the type. M27.4 is assigned.

Documentation should include details of the cyst's location, size, characteristics (fluid type), diagnostic methods used, and treatment provided.

  • Specialties:Oral and Maxillofacial Surgery, Dentistry, Otolaryngology
  • Place of Service:Office, Outpatient Hospital, Inpatient Hospital, Ambulatory Surgical Center
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