ICD-10 Code C76.42 – Malignant neoplasm of left upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C76.42 – Malignant neoplasm of left upper limb
What it is
C76.42 identifies a malignant neoplasm in the left upper limb when the exact site is not further specified. Use it for cancer involving the arm, forearm, wrist, or related soft tissues on the left side.
Clinical signs
Clinical features vary; refer to documentation. Commonly, records describe a mass, pain, swelling, or functional limitation in the left upper limb, with pathology or imaging supporting malignancy.
When to use this code
Use C76.42 when the provider documents a primary or unspecified malignant tumor of the left upper limb and does not name a more specific anatomic site. It is appropriate when laterality is clear but the exact structure is not. Check documentation if the lesion is described as metastatic, secondary, or arising from bone, skin, or a named soft-tissue site.
Do not use for
Do not use this code for benign, in situ, or secondary malignant neoplasms. If the documentation identifies a more specific location or histology, code that diagnosis instead.
Coding tip
Confirm both laterality and whether the tumor is primary, secondary, or unspecified before assigning C76.42.