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v1.0.0
ICD-10 Guide
DiagnosesExposure To Strep Throat

Exposure To Strep Throat

ICD-10 Coding for Exposure to Strep Throat(Z20.818)

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

Diagnosis Overview

What is Exposure To Strep Throat?
Essential facts and insights about Exposure to Strep Throat

Key Clinical Considerations:

  • Sore throat, fever, swollen lymph nodes, red and swollen tonsils, white patches on tonsils
  • Rapid antigen detection test (RADT), throat culture
  • Fever, tender anterior cervical lymphadenopathy, erythematous pharynx

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of exposure, clinical symptoms, test results, treatment plan
  • ICD-10-CM coding terminology for strep throat (e.g., J02.0)
  • Example: 'Patient presents with sore throat and fever, tested positive for Group A Streptococcus.'

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for strep throat coding, avoid using codes for viral pharyngitis.
  • Common errors include misdiagnosing viral infections as strep throat.

Code Exclusions

Important Exclusions

  • Viral pharyngitis, chronic tonsillitis, other bacterial infections
  • J02.9 (Acute pharyngitis, unspecified)

Related ICD-10 Codes

Primary Codes
J02.0
Streptococcal pharyngitis
Ancillary Codes
B95.5
Differential Codes
J02.0
J02.0
for confirmed active infections with symptoms and positive test results.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Family Medicine

Specialty Applications

  • Children and adults with symptoms of pharyngitis, family medicine clinics, urgent 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, test results, and treatment.

Billing considerations?

Ensure accurate coding to reflect the diagnosis and any associated treatments.