ICD-10 Code K23 – Disorders of esophagus in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K23 – Disorders of esophagus in diseases classified elsewhere
What it is
K23 identifies an esophageal disorder that is caused by another underlying disease. Use it when the record links the esophageal problem to a separate condition, rather than a primary esophageal diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings may include dysphagia, pain with swallowing, reflux-related symptoms, or other esophageal dysfunction tied to the underlying disease.
When to use this code
Use K23 when the provider states the esophageal condition is due to, or associated with, another disease and no more specific code is available. Confirm the causal relationship in the note before assigning this code. If the record names the underlying disorder and the esophageal manifestation, code both as directed.
Do not use for
Do not use K23 for primary esophageal disorders without an external cause or underlying disease. Check documentation if the chart only describes nonspecific swallowing symptoms or a different, more specific esophageal diagnosis.
Coding tip
Always look for the linked underlying disease first; K23 is a manifestation code, so the cause must be documented.