ICD-10 Code C76.51 – Malignant neoplasm of right lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C76.51 – Malignant neoplasm of right lower limb
What it is
C76.51 identifies a malignant neoplasm in the right lower limb when the exact site is not otherwise specified. Use it for a primary or unspecified malignant tumor documented in that anatomic region.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include a mass, pain, swelling, or local functional limitation, but the diagnosis should be based on the documented malignant neoplasm and site.
When to use this code
Use this code when the provider documents a malignant neoplasm of the right lower limb and does not specify a more exact bone, joint, skin, or soft-tissue site. It is appropriate when laterality is known but the precise subsite is not.
Check documentation if the record names a specific structure, because a more detailed code may apply. Confirm whether the tumor is primary, secondary, or unspecified before assigning C76.51.
Do not use for
Do not use C76.51 if the malignancy is documented in a specific lower-limb site with its own code, such as skin or bone. Do not use it for benign, uncertain, or metastatic sites without documentation support.
Coding tip
Always code the most specific documented site first; use C76.51 only when the right lower limb is documented but the exact subsite is not.