ICD-10 Code K42 – Umbilical hernia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K42 – Umbilical hernia
What it is
K42 identifies an umbilical hernia, which occurs when tissue or intestine pushes through a weakness near the navel. Use this code when the record documents an umbilical hernia without a more specific complication.
Clinical signs
Typical findings include a soft bulge at or near the umbilicus that may become more noticeable with coughing or straining. Clinical features vary; refer to documentation for reducibility, pain, or signs of obstruction.
When to use this code
Use K42 when the provider documents an umbilical hernia on the diagnosis list, assessment, or operative note. It also fits follow-up visits for a known umbilical hernia when no separate complication is recorded. If the note specifies incarceration, obstruction, or gangrene, check documentation for a more specific code.
Do not use for
Do not use K42 for other abdominal wall hernias, such as inguinal or ventral hernias. Do not use it when the chart describes a different hernia type or a postoperative complication instead.
Coding tip
Match the code to the provider’s exact hernia location and complication status; if the site or severity is unclear, check documentation.