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v1.0.0
ICD-10 Guide
DiagnosesGastric Outlet Obstruction

Gastric Outlet Obstruction

ICD-10 Coding for Gastric Outlet Obstruction(K31.1, C25.0)

PRIMARY SPECIALTYGastroenterology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Gastric Outlet Obstruction?
Essential facts and insights about Gastric Outlet Obstruction

Key Clinical Considerations:

  • Nausea and vomiting
  • Abdominal pain
  • Early satiety
  • Weight loss
  • Dehydration
  • Electrolyte imbalances

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including onset and duration of symptoms
  • Results of imaging studies (e.g., X-ray, CT scan)
  • Endoscopic findings
  • Surgical notes if applicable
  • Specific terminology such as 'pyloric stenosis' or 'malignant obstruction'

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines: Use specific codes based on the underlying cause of the obstruction.
  • Common errors: Misclassifying the type of obstruction or failing to document the cause.

Code Exclusions

Important Exclusions

  • Functional gastric outlet obstruction
  • Gastric cancer without obstruction
  • Alternative codes for related gastrointestinal disorders

Related ICD-10 Codes

Primary Codes
K31.84
Gastric outlet obstruction
K31.89
Other specified diseases of stomach and duodenum
Ancillary Codes
K31.89
Differential Codes
K31.84

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Gastroenterology

Specialty Applications

  • Patients with peptic ulcers
  • Patients with malignancies affecting the stomach
  • Emergency and outpatient settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What are the documentation requirements?

Document all symptoms, diagnostic tests, and treatment plans.

What are the billing considerations?

Ensure accurate coding to reflect the severity and cause of the obstruction.