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v1.0.0
ICD-10 Guide
DiagnosesFood Intolerance

Food Intolerance

ICD-10 Coding for Food Intolerance(E73.9, K90.41, K52.2)

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

Diagnosis Overview

What is Food Intolerance?
Essential facts and insights about Food Intolerance

Key Clinical Considerations:

  • Bloating, gas, diarrhea, abdominal pain after consuming specific foods
  • Elimination diet, food challenge tests, hydrogen breath tests
  • Abdominal tenderness, signs of malnutrition, weight loss

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of symptoms related to food intake, dietary habits, and response to elimination diets
  • ICD-10 terminology such as 'Food Intolerance', 'Non-IgE mediated food allergy'
  • Example: 'Patient reports symptoms of bloating and diarrhea after dairy consumption, eliminated dairy for 2 weeks with symptom resolution.'

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for specific food intolerances to avoid miscoding.
  • Common errors include using allergy codes instead of intolerance codes.

Code Exclusions

Important Exclusions

  • IgE-mediated food allergies, celiac disease
  • Alternative codes for related gastrointestinal disorders

Related ICD-10 Codes

Primary Codes
K90.4
Food intolerance, unspecified
K90.41
Food intolerance due to lactose
K90.42
Food intolerance due to gluten
Ancillary Codes
R10.8
R14.0
R62.51
Differential Codes
Z91.011
K90.0
A09

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Gastroenterology

Specialty Applications

  • Individuals with gastrointestinal symptoms post-food intake, patients with suspected food intolerances
  • Gastroenterology clinics, primary care 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?

Document patient history, symptoms, dietary changes, and test results.

Billing considerations?

Ensure accurate coding to reflect specific food intolerances for proper reimbursement.