ICD-10 Code K44 – Diaphragmatic hernia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K44 – Diaphragmatic hernia
What it is
K44 identifies a hernia where part of the stomach or another abdominal structure moves through the diaphragm into the chest. Use it when the record documents a diaphragmatic or hiatal hernia.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include reflux, chest or upper abdominal discomfort, regurgitation, or imaging evidence of herniation through the diaphragm.
When to use this code
Use K44 when the provider documents a diaphragmatic hernia, including hiatal hernia terminology. Apply it when imaging, endoscopy, or operative notes confirm the diagnosis. If the note only suggests hernia without clear documentation, check documentation before coding.
Do not use for
Do not use K44 for other abdominal wall hernias, such as inguinal or ventral hernias. Do not use it when the record describes a different type of hernia or the site is not the diaphragm.
Coding tip
Check the operative, imaging, or discharge note for the exact hernia type and site before assigning K44.