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v1.0.0
ICD-10 Guide
DiagnosesForeign Body Ingestion

Foreign Body Ingestion

ICD-10 Coding for Foreign Body Ingestion(T18.1, Z03.821)

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

Diagnosis Overview

What is Foreign Body Ingestion?
Essential facts and insights about Foreign Body Ingestion

Key Clinical Considerations:

  • Choking or gagging sensation
  • Abdominal pain or discomfort
  • Vomiting or refusal to eat
  • Respiratory distress or stridor

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of ingestion incident
  • Description of the foreign body type and size
  • Results of imaging studies (e.g., X-ray, CT scan)
  • Assessment of complications (e.g., perforation, obstruction)

Coding Guidelines

Usage Guidelines & Examples

  • Use T18 codes for foreign body ingestion; differentiate by location.
  • Common errors include using incorrect codes for non-ingested foreign bodies.

Code Exclusions

Important Exclusions

  • Ingestion of non-foreign objects (e.g., food items)
  • Alternative codes for foreign body aspiration (T17 codes)

Related ICD-10 Codes

Primary Codes
T18.0
Foreign body in esophagus
T18.1
Foreign body in stomach
T18.2
Foreign body in intestine
Ancillary Codes
W44.XXX
Y92.XXX
Differential Codes
T18.0
T18.0
if the foreign body is located in the mouth, not the esophagus.
T18.XXX
T18.XXX
codes when a foreign body is confirmed through imaging or endoscopy.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Pediatrics

Specialty Applications

  • Pediatric patients, especially toddlers and young children
  • Emergency departments, outpatient clinics, and inpatient 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 the type, size, and location of the foreign body, along with any symptoms and imaging results.

Billing considerations?

Ensure accurate coding based on the specific location and type of foreign body for appropriate reimbursement.