ICD-10 Code C49.5 – Malignant neoplasm of connective and soft tissue of pelvis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C49.5 – Malignant neoplasm of connective and soft tissue of pelvis
What it is
C49.5 identifies a malignant tumor arising in the connective or soft tissues of the pelvis. Use it when documentation states a primary soft tissue sarcoma or other malignant neoplasm in this pelvic site.
Clinical signs
Clinical features vary; refer to documentation. Pelvic soft tissue cancers may present as a mass, pain, swelling, or compression of nearby structures, but diagnosis depends on pathology and site confirmation.
When to use this code
Use C49.5 when the record clearly documents a malignant neoplasm of connective or soft tissue located in the pelvis. It is appropriate for primary tumors of pelvic soft tissues, including cases confirmed by biopsy or surgical pathology. If the note only says “pelvic mass” or “tumor,” check documentation before coding.
Do not use for
Do not use this code for bone malignancies, metastatic disease to the pelvis, or malignant neoplasms of pelvic organs such as bladder, uterus, or ovary. Check documentation if the anatomic site is unclear.
Coding tip
Verify that the provider documents both malignancy and pelvic soft tissue origin before assigning C49.5.