C71.1
BillableMalignant neoplasm of frontal lobe
HCC Category Mapping
V28HCC 20 — Lung and Other Severe Cancers
0.000V24HCC 10 — Lymphoma and Other Cancers
0.675ESRDHCC 10 — Lymphoma and Other Cancers
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Cancer that develops in the frontal lobe of the brain, which controls personality, decision-making, and movement. This is a malignant brain tumor in the front part of the cerebrum.
Coding Tips
- •Confirm documentation specifies frontal lobe location to differentiate from other cerebral lobes
- •Note laterality (left or right) when documented, as this impacts surgical planning
Clinical Significance
Frontal lobe malignancy affects the brain region controlling executive function, personality, motor planning, and expressive language (Broca's area on the dominant side). These tumors can cause profound personality changes, motor deficits, and speech impairment. Frontal lobe glioblastoma is one of the most common primary brain cancers and carries a poor prognosis despite aggressive multimodal treatment.
Documentation Requirements
- ✓Pathology confirming malignancy with histological type and World Health Organization grade
- ✓MRI brain documenting frontal lobe location
- ✓Laterality (right versus left hemisphere) when documented, as this affects neurological presentation
- ✓Molecular marker results (IDH, MGMT, 1p/19q)
- ✓Assessment of functional status and neurological deficits
Commonly Confused Codes
C71.2 — Temporal lobe: frontotemporal tumors spanning both lobes may require C71.8 (overlapping)C71.0 — Cerebrum, except lobes: use C71.1 when documentation specifies frontal lobeC71.8 — Overlapping sites: use when tumor extends across frontal and adjacent lobesC79.31 — Brain metastasis: confirm this is a primary brain cancer, not a metastatic lesion to the frontal lobe