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ICD-10 Guide
DiagnosesHiatal Hernia

Hiatal Hernia

ICD-10 Coding for Hiatal Hernia(K44.0, K44.1, K44.9)

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

Diagnosis Overview

What is Hiatal Hernia?
Essential facts and insights about Hiatal Hernia

Key Clinical Considerations:

  • Heartburn or acid reflux
  • Dysphagia (difficulty swallowing)
  • Chest pain
  • Regurgitation of food or sour liquid
  • Key diagnostic tests include upper GI series, endoscopy, and esophageal manometry
  • Physical exam may reveal epigastric tenderness or signs of gastroesophageal reflux

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including symptoms and duration
  • Results of diagnostic tests
  • Physical examination findings
  • Specific coding terminology includes 'hiatal hernia' and 'gastroesophageal reflux disease (GERD)'
  • Documentation examples: 'Patient presents with symptoms consistent with hiatal hernia, confirmed by endoscopy.'

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines emphasize specificity in coding hernia type.
  • Common errors include misclassifying the type of hernia or omitting associated conditions.

Code Exclusions

Important Exclusions

  • Congenital diaphragmatic hernia
  • Other types of hernias such as inguinal or umbilical hernias

Related ICD-10 Codes

Primary Codes
K44.9
Unspecified hiatal hernia
K44.1
Paraesophageal hernia
Ancillary Codes
Z98.89
Differential Codes
Q79.0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Surgery

Specialty Applications

  • Adults, particularly those over 50
  • Outpatient and inpatient surgical 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

Documentation requirements?

Include detailed patient history, diagnostic test results, and physical exam findings.

Billing considerations?

Ensure accurate coding to reflect the type of hernia and any associated conditions.