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v1.0.0
ICD-10 Guide
DiagnosesPhonological Disorder

Phonological Disorder

ICD-10 Coding for Phonological Disorder(F80.0)

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

Diagnosis Overview

What is Phonological Disorder?
Essential facts and insights about Phonological Disorder

Key Clinical Considerations:

  • Inconsistent speech sound production patterns
  • Difficulty with phonological rules affecting speech intelligibility
  • Limited phonetic inventory

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history and presenting symptoms
  • Results from standardized speech assessments
  • Therapy progress notes and treatment plans

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for appropriate use of ICD-10 codes.
  • Common errors include misclassifying speech sound disorders.

Code Exclusions

Important Exclusions

  • Articulation disorders
  • Other speech sound disorders not classified as phonological

Related ICD-10 Codes

Primary Codes
315.39
Phonological Disorder
Ancillary Codes
R48.2
Differential Codes
F80.1
F80.1
for expressive language issues without phonological errors.
F80.2
F80.2
when both receptive and expressive language issues are present.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Speech-Language Pathology

Specialty Applications

  • Children with speech sound disorders
  • Speech-language pathology 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

What are the documentation requirements?

Include patient history, assessment results, and treatment plans.

What are the billing considerations?

Ensure accurate coding and documentation to support therapy sessions.