ICD-10 Code K27.1 – Acute peptic ulcer, site unspecified, with perforation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K27.1 – Acute peptic ulcer, site unspecified, with perforation
What it is
K27.1 identifies an acute peptic ulcer in an unspecified site when the ulcer has perforated. Use it when the record confirms a peptic ulcer and a full-thickness break, but does not specify gastric or duodenal location.
Clinical signs
Typical findings include sudden severe abdominal pain, peritoneal signs, and evidence of free air or perforation on imaging or surgery. Clinical features vary; refer to documentation.
When to use this code
Use K27.1 when the provider documents an acute peptic ulcer with perforation and does not identify the site. It fits emergency, operative, or discharge documentation that clearly states perforation. If the ulcer site is specified, choose the more precise code.
Do not use for
Do not use this code for peptic ulcer without perforation, bleeding only, or a chronic ulcer documented at a known site. Check documentation if the record is unclear.
Coding tip
Verify both acuity and perforation in the note before assigning K27.1.