ICD-10 Code D21.0 – Benign neoplasm of connective and other soft tissue of head, face and neck (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D21.0 – Benign neoplasm of connective and other soft tissue of head, face and neck
What it is
This code identifies a noncancerous growth arising from connective or other soft tissue in the head, face, or neck. It is used when the lesion is benign and the site is documented in this anatomic region.
Clinical signs
Clinical features vary; refer to documentation. These lesions may present as a localized, slow-growing mass or swelling, sometimes found on exam or imaging, with pathology confirming benign behavior.
When to use this code
Use D21.0 when the provider documents a benign soft tissue tumor in the head, face, or neck and the record supports that location. Apply it after biopsy, excision, or specialist assessment when the diagnosis is clearly benign. If the site is broader or unclear, check documentation.
Do not use for
Do not use this code for malignant neoplasms, uncertain behavior, or lesions in other body sites. If the pathology or note does not confirm benign soft tissue origin, check documentation.
Coding tip
Verify both the benign nature and the exact anatomic site before assigning D21.0.