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v1.0.0
ICD-10 Guide
DiagnosesLaryngopharyngeal Reflux

Laryngopharyngeal Reflux

ICD-10 Coding for Laryngopharyngeal Reflux(K21.9)

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

Diagnosis Overview

What is Laryngopharyngeal Reflux?
Essential facts and insights about Laryngopharyngeal Reflux

Key Clinical Considerations:

  • Chronic cough
  • Hoarseness
  • Sore throat
  • Globus sensation
  • Dysphagia
  • Laryngitis

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of symptoms
  • Details of physical examination
  • Results of laryngoscopy or pH monitoring
  • Treatment history and response
  • Patient lifestyle factors (diet, smoking)

Coding Guidelines

Usage Guidelines & Examples

  • Usage guidelines: Use K21.9 for GERD-related symptoms.
  • Common errors: Misclassifying LPR as simple GERD.

Code Exclusions

Important Exclusions

  • Esophagitis due to reflux (K21.0)
  • Other gastrointestinal disorders

Related ICD-10 Codes

Primary Codes
K21.9
Gastro-esophageal reflux disease without esophagitis
R63.3
Increased appetite
Ancillary Codes
J37.0
Differential Codes
K21.0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Otolaryngology

Specialty Applications

  • Adults and children with chronic throat symptoms
  • Outpatient otolaryngology clinics

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 symptom history, diagnostic test results, and treatment plans.

Billing considerations?

Ensure accurate coding to reflect the severity and complexity of the condition.