Esophageal Adenocarcinoma ICD-10-CM Codes

Find accurate ICD-10 codes for esophageal adenocarcinoma, including C15 series. Learn about diagnosis, billing, tumor locations, and treatment guidance.

By Wynona Jugueta on Aug 8, 2025.

Fact Checked by Karina Jimenea.

Use Code

What ICD-10 codes are used for esophageal adenocarcinoma?

The primary ICD-10-CM category for a malignant neoplasm of the esophagus, including esophageal adenocarcinoma, is C15, which includes several subcodes to indicate the specific location of the tumor along the esophagus:

C15.3: Malignant neoplasm of upper third of esophagus
C15.4: Malignant neoplasm of middle third of esophagus
C15.5: Malignant neoplasm of lower third of esophagus
C15.8: Malignant neoplasm of overlapping sites of esophagus
C15.9: Malignant neoplasm of esophagus, unspecified

These codes help identify whether the malignant tumor is located in the upper, middle, or lower third of the esophagus, if it's an overlapping lesion, or if it involves ill-defined sites. It's important to note that codes like C16.0–C16.9, related to malignant neoplasms of the stomach (e.g., lesser curvature), do not apply to esophagus cancer and unspecified malignant neoplasm. These should not be used when documenting esophageal adenocarcinoma.

Which esophageal adenocarcinoma ICD codes are billable?

All C15-series codes listed above are billable ICD-10-CM codes for esophageal adenocarcinoma and squamous cell carcinoma of the esophagus. Whether the diagnosis involves a primary or metastatic malignant neoplasm, these codes are valid for documentation, reporting, and reimbursement. In some cases, clinicians may also use an additional code to reflect metastatic malignant neoplasm involving other organs.

Clinical information

Esophageal cancer is a type of abnormal growth that forms in the innermost layer of the esophagus, often beginning in the abnormal cells lining the organ. Cancer cells may develop in any part of the esophagus and can eventually spread to other organs.

Common forms include adenocarcinoma and squamous cell carcinoma, each with different cellular origins. This malignant neoplasm often presents with early symptoms like difficulty swallowing, weight loss, or chest discomfort. It is notably more common in men than women and may be influenced by factors such as chronic acid reflux, obesity, smoking, and poor nutrition.

Diagnosis typically involves imaging studies, endoscopic exams, and biopsies to detect abnormal cells or tumors. Treatment plans vary based on cancer stage and may include treatments like surgery, radiation, chemotherapy, targeted drug therapy, and nutritional support to help manage complications related to swallowing difficulties.

Early detection significantly improves outcomes and decreases risk factors, especially when caught before the cancer has metastasized to ill-defined sites or involved overlapping lesions. A precise ICD-10 diagnosis allows healthcare providers to track the disease accurately and implement appropriate treatment protocols, like targeted therapy or running additional imaging tests. Treatments include surgery, radiation, and chemotherapy.

Synonyms include:

Esophageal cancer
Esophageal carcinoma
Esophageal neoplasm
Esophageal tumor
Adenocarcinoma of the esophagus

Commonly asked questions

Use an esophageal adenocarcinoma ICD-10 code when a patient has been clinically diagnosed with a malignant tumor originating in the glandular cells of the esophagus. These codes are essential for documenting the cancer’s location and facilitating appropriate treatment planning and medical billing.

Common treatments for esophageal adenocarcinoma include surgery, chemotherapy, radiation therapy, and targeted drug therapies. The choice of treatment depends on the cancer's stage, tumor location, patient health, and whether it's a primary or metastatic malignant neoplasm.

A diagnosis code for esophageal adenocarcinoma indicates that a patient has a confirmed case of cancer involving abnormal growth of glandular cells within the esophagus. The code helps identify the tumor's specific location and guides clinical decision-making, reporting, and reimbursement.

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