ICD-10 Code K27 – Peptic ulcer, site unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K27 – Peptic ulcer, site unspecified
What it is
K27 identifies a peptic ulcer when the site is not specified in the record. Use it for an ulcer of the stomach or duodenum only if the documentation does not name the exact location.
Clinical signs
Typical findings include epigastric pain, dyspepsia, nausea, or evidence of upper gastrointestinal bleeding. Clinical features vary; refer to documentation.
When to use this code
Use K27 when the provider documents a peptic ulcer but does not specify whether it is gastric or duodenal, or when the site remains unclear after review. It may also apply when the note confirms a peptic ulcer without further detail. Do not infer the location from symptoms alone.
Do not use for
Do not use K27 if the record identifies a specific ulcer site, such as gastric or duodenal, or if the condition is a different type of ulcer. Check documentation.
Coding tip
Query the provider if the ulcer site is missing but can be clarified from the chart.