C15.5

Billable

Malignant neoplasm of lower third of esophagus

HCC Category Mapping

V28HCC 20 — Lung and Other Severe Cancers

0.000

V24HCC 9 — Lung and Other Severe Cancers

0.973

ESRDHCC 9 — Lung and Other Severe Cancers

0.000

What This Code Means

Cancer of the lower section of the esophagus, the tube that carries food from the throat to the stomach.

Coding Tips

•The lower third of esophagus extends from approximately 32 cm to the gastroesophageal junction
•Verify documentation distinguishes lower third from gastroesophageal junction cancers (which may be coded as stomach cancer)

Clinical Significance

Malignant neoplasm of the lower third of the esophagus carries a high mortality rate and often presents at an advanced stage due to lack of early symptoms. This location is associated with Barrett esophagus and gastroesophageal reflux disease as precursor conditions, making it critical for risk adjustment to capture the full disease burden. Accurate coding ensures appropriate resource allocation for complex treatment regimens including neoadjuvant therapy and surgical resection.

Documentation Requirements

✓Anatomical location confirmed as lower third of esophagus (approximately 32 cm to gastroesophageal junction)
✓Histological type (adenocarcinoma vs squamous cell carcinoma)
✓Stage of disease (TNM staging preferred)
✓Status of disease: active treatment, surveillance, or history of
✓Any associated Barrett esophagus or gastroesophageal reflux disease history

Excludes 1 — Do NOT code together

malignant neoplasm of cardio-esophageal junction (C16.0)

Commonly Confused Codes

C15.3 — Upper third of esophagus: different anatomical location with different surgical approach; verify endoscopy or imaging reports for exact location C15.4 — Middle third of esophagus: adjacent segment; confirm documentation specifies lower third specifically C16.0 — Malignant neoplasm of cardia: tumors at the gastroesophageal junction may be classified as either esophageal or gastric; Siewert classification helps determine correct code C15.8 — Overlapping sites of esophagus: use when tumor spans multiple esophageal segments rather than being confined to lower third

Code Hierarchy

└C15Malignant neoplasm of esophagus └C15.5Malignant neoplasm of lower third of esophagus

└C15.5Malignant neoplasm of lower third of esophagus