C03.0
BillableMalignant neoplasm of upper gum
HCC Category Mapping
V28HCC 21 — Breast, Prostate, Colorectal and Other Cancers and Tumors
0.545V24HCC 11 — Colorectal, Bladder, and Other Cancers
0.306ESRDHCC 11 — Colorectal, Bladder, and Other Cancers
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Cancer of the upper gum tissue, the soft tissue covering the upper jaw bone.
Coding Tips
- •Upper gum refers to the gingiva of the maxilla; distinguish from lower gum (C03.1)
- •Verify whether the lesion originates in gum tissue versus underlying bone or other structures
Clinical Significance
Malignant neoplasm of the upper gum is a relatively uncommon oral cavity cancer that carries significant risk adjustment weight. Early detection is critical as gingival cancers can invade underlying maxillary bone, and accurate site-specific coding ensures appropriate resource allocation for the complex multimodal treatment these patients require.
Documentation Requirements
- ✓Histological type confirmed by biopsy (squamous cell carcinoma is most common)
- ✓Specific anatomical site: upper gum (maxillary gingiva) documented by provider
- ✓TNM staging including tumor size, nodal involvement, and metastatic status
- ✓Current treatment status: active treatment, surveillance, or history of
- ✓Tobacco and alcohol use history as risk factors
Commonly Confused Codes
C03.1 — Malignant neoplasm of lower gum; confused when documentation says 'gum cancer' without specifying upper vs lower jawC03.9 — Malignant neoplasm of gum, unspecified; should only be used when upper/lower cannot be determined from documentationC41.0 — Malignant neoplasm of bones of skull/face; use when cancer originates in maxillary bone rather than gingival soft tissueC05.0 — Malignant neoplasm of hard palate; adjacent structure that may be confused when tumor extends from gum to palate