ICD-10 Code C15 – Malignant neoplasm of esophagus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C15 – Malignant neoplasm of esophagus
What it is
C15 identifies a malignant tumor arising in the esophagus. Use it when documentation states primary cancer of the esophagus, without a more specific subsite code.
Clinical signs
Common findings include progressive dysphagia, weight loss, and chest discomfort. Diagnosis is usually supported by endoscopic evaluation and pathology confirming malignancy; clinical features vary, so refer to documentation.
When to use this code
Use C15 when the provider documents esophageal cancer or malignant neoplasm of the esophagus and no more detailed site is given. It also fits cases where the record confirms a primary esophageal malignancy but does not specify histology or exact location. Check documentation if the tumor is metastatic or involves another digestive site.
Do not use for
Do not use C15 for benign esophageal lesions, dysplasia, or suspected cancer without confirmation. If the cancer is secondary or another organ is the primary site, code the documented primary diagnosis instead.
Coding tip
Verify whether the chart specifies a more exact esophageal subsite before defaulting to C15.