ICD-10 Code C06.2 – Malignant neoplasm of retromolar area (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C06.2 – Malignant neoplasm of retromolar area
What it is
C06.2 identifies a malignant tumor arising in the retromolar area, the tissue just behind the last lower molar. Use it when documentation specifies cancer in this oral cavity site.
Clinical signs
Clinical features may include a persistent oral ulcer, mass, pain, bleeding, or difficulty chewing. Diagnosis is based on the documented malignant lesion in the retromolar region; clinical features vary, refer to documentation.
When to use this code
Use C06.2 when the provider documents primary malignancy of the retromolar area, including biopsy-confirmed cancer or a clearly stated malignant lesion at that site. Code it from the recorded anatomic location, not from nonspecific mouth symptoms alone.
Do not use for
Do not use this code for benign oral lesions, dysplasia, or cancers arising in another oral cavity site. If the record only says “mouth cancer” without a retromolar location, check documentation.
Coding tip
Confirm the exact oral subsite in the pathology or operative note before assigning C06.2.