ICD-10 Code K20.0 – Eosinophilic Esophagitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K20.0 – Eosinophilic esophagitis
What it is
Eosinophilic esophagitis is an inflammatory condition of the esophagus linked to eosinophil infiltration. It can cause swallowing problems and food impaction.
Clinical signs
Patients often have dysphagia, chest discomfort, or episodes of food sticking in the esophagus. Clinical features vary; refer to documentation for endoscopic and biopsy findings supporting the diagnosis.
When to use this code
Use K20.0 when the provider documents eosinophilic esophagitis or EoE. Apply it when the encounter is for confirmed disease, ongoing evaluation, or related symptoms with documented diagnosis. Check documentation if the note only mentions esophagitis without eosinophilic involvement.
Do not use for
Do not use this code for reflux esophagitis, infectious esophagitis, or unspecified esophagitis. If the record does not clearly identify eosinophilic esophagitis, check documentation.
Coding tip
Code K20.0 only when the clinician clearly documents eosinophilic esophagitis, not just esophageal inflammation.