ICD-10 Code D21.21 – Benign neoplasm of connective and other soft tissue of right lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D21.21 – Benign neoplasm of connective and other soft tissue of right lower limb, including hip
What it is
This code identifies a noncancerous tumor arising from connective or other soft tissues in the right lower limb, including the hip. Use it when the record specifies a benign soft tissue neoplasm at that anatomic site.
Clinical signs
Findings often include a localized mass, swelling, or a slowly enlarging lump. Clinical features vary; refer to documentation for pathology, imaging, or clinician assessment confirming benign behavior.
When to use this code
Use D21.21 when documentation names a benign neoplasm of connective or other soft tissue in the right leg or hip region. It is appropriate for confirmed benign tumors, including cases documented by biopsy, excision, or specialist assessment.
If the site is the right lower limb or hip and the lesion is clearly benign, this code is the specific choice. Check documentation if the laterality, tissue type, or benign nature is unclear.
Do not use for
Do not use this code for malignant tumors, uncertain behavior, or lesions without a documented benign diagnosis. Check documentation if the mass is nonspecific, skin-based, or located outside the right lower limb and hip.
Coding tip
Verify both laterality and benign pathology before assigning D21.21.