C16.3
BillableMalignant neoplasm of pyloric antrum
HCC Category Mapping
V28HCC 20 — Lung and Other Severe Cancers
0.000V24HCC 9 — Lung and Other Severe Cancers
0.973ESRDHCC 9 — Lung and Other Severe Cancers
0.000RxHCCHCC 22 — Cancer, Other Specified Sites
0.000What This Code Means
Cancer of the pyloric antrum, which is the lower portion of the stomach that connects to the small intestine.
Coding Tips
- •The pyloric antrum is the distal portion of the stomach; ensure it is not confused with the pylorus itself
- •Verify documentation specifies antrum location to differentiate from other stomach regions
Clinical Significance
Malignant neoplasm of the pyloric antrum is the most common location for gastric cancer worldwide, particularly in populations with high Helicobacter pylori prevalence. The antrum is the distal portion of the stomach, and cancers here may cause gastric outlet obstruction, leading to significant symptoms including nausea, vomiting, and weight loss. This specific coding captures the distinct surgical and treatment considerations for antral tumors.
Documentation Requirements
- ✓Documentation confirming pyloric antrum as the primary tumor location
- ✓Histological type (intestinal vs diffuse type adenocarcinoma)
- ✓Helicobacter pylori status if tested
- ✓Stage of disease including lymph node involvement
- ✓Presence or absence of gastric outlet obstruction
Commonly Confused Codes
C16.4 — Pylorus: the pylorus is the muscular valve itself; the antrum is the wider region proximal to the pylorusC16.2 — Body of stomach: the body is proximal to the antrum; confirm endoscopic or imaging localizationC16.5/C16.6 — Lesser/greater curvature: these describe medial/lateral surfaces rather than longitudinal segments
Code Hierarchy
└C16Malignant neoplasm of stomach└C16.3Malignant neoplasm of pyloric antrum
└C16.3Malignant neoplasm of pyloric antrum