ICD-10 Code C49.20 – Malignant neoplasm of connective and soft tissue of unspecified lower limb, including hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C49.20 – Malignant neoplasm of connective and soft tissue of unspecified lower limb, including hip
What it is
C49.20 identifies a malignant soft tissue or connective tissue tumor in the lower limb or hip area when the exact site is not documented. Use it for cancers arising from muscle, fat, fibrous tissue, or related structures.
Clinical signs
Findings often include a growing mass, pain, swelling, or reduced function in the affected limb. Clinical features vary; refer to documentation for the confirmed diagnosis and exact anatomic site.
When to use this code
Use this code when the record confirms a malignant neoplasm of connective or soft tissue and the provider documents the lower limb or hip without specifying laterality or a more exact location. It also fits when pathology or imaging supports the diagnosis but the site remains unspecified. If laterality is documented, check for a more precise code.
Do not use for
Do not use this code for benign soft tissue tumors, metastatic disease to the limb, or cancers with a more specific documented site. Check documentation if the lesion is not clearly malignant.
Coding tip
Code to the highest level of specificity available, and query for laterality or exact site when the chart only says “lower limb” or “hip.”