ICD-10 Code K31.3 – Pylorospasm, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K31.3 – Pylorospasm, not elsewhere classified
What it is
K31.3 identifies pylorospasm, a functional tightening of the pyloric muscle that can slow stomach emptying. Use it when the record specifically documents pylorospasm and no other more specific pyloric disorder.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include intermittent gastric outlet-type symptoms, such as vomiting or feeding intolerance, with evidence that the pylorus is temporarily narrowed rather than structurally obstructed.
When to use this code
Use K31.3 when the clinician documents pylorospasm as the diagnosis, especially in a workup for delayed gastric emptying or gastric outlet symptoms. It is appropriate when the chart distinguishes a functional spasm from fixed obstruction or another gastric disorder. Check documentation if the note is unclear.
Do not use for
Do not use this code for mechanical pyloric stenosis, peptic ulcer disease, or nonspecific vomiting without a documented pyloric spasm. If the record only says “gastric outlet obstruction,” you need more detail before coding.
Coding tip
Code K31.3 only when the provider names pylorospasm; otherwise, query for clarification before assigning a pyloric diagnosis.