ICD-10 Code D21.20 – Benign neoplasm of connective and other soft tissue of unspecified lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D21.20 – Benign neoplasm of connective and other soft tissue of unspecified lower limb, including hip
What it is
D21.20 identifies a noncancerous tumor arising from connective or other soft tissue in an unspecified lower limb, including the hip. Use it when the record documents a benign soft tissue neoplasm but does not name a more specific site.
Clinical signs
Findings may include a localized mass, swelling, or a slowly enlarging lump in the lower limb or hip region. Clinical features vary; refer to documentation, imaging, or pathology when available.
When to use this code
Use this code when the clinician documents a benign soft tissue tumor of the lower limb or hip and the exact subsite is not specified. It also fits cases where pathology confirms benign behavior, but the note does not identify a more precise anatomic location. If the lesion is described as a different tissue type or a malignant mass, do not assign this code.
Do not use for
Do not use D21.20 for malignant neoplasms, uncertain behavior, or lesions documented as cysts, abscesses, or inflammatory masses. Check documentation if the site is actually specified elsewhere in the record.
Coding tip
Query for the exact lower-limb site before defaulting to the unspecified code.