ICD-10 Code C71.3 – Malignant neoplasm of parietal lobe (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C71.3 – Malignant neoplasm of parietal lobe
What it is
C71.3 identifies a malignant tumor arising in the parietal lobe of the brain. Use this code when documentation specifies a cancerous neoplasm in that anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Parietal lobe tumors may be associated with sensory deficits, visuospatial problems, or impaired coordination, but you should code only what is documented.
When to use this code
Use C71.3 when the provider documents a primary malignant neoplasm of the parietal lobe, including biopsy-confirmed or clinically diagnosed cases. It also applies when the record clearly localizes the tumor to the parietal lobe and no more specific code is available. Check documentation if laterality or behavior is unclear.
Do not use for
Do not use this code for benign, metastatic, or uncertain brain lesions. If the record describes a malignant neoplasm in another brain site, code the documented location instead.
Coding tip
Confirm that the chart identifies the parietal lobe specifically; vague terms like “brain tumor” need clarification before you code.