ICD-10 Guide

Hypersomnia

ICD-10 Coding for Hypersomnia(G47.11, G47.12, G47.14)

PRIMARY SPECIALTYNeurology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Hypersomnia?

Essential facts and insights about Hypersomnia

Key Clinical Considerations:

Excessive daytime sleepiness despite adequate sleep duration
Polysomnography showing prolonged sleep episodes
Neurological examination may reveal no significant abnormalities

Clinical Information

Clinical Criteria & Documentation Requirements

Patient sleep history and symptom duration
Results from sleep studies (e.g., polysomnography, MSLT)
Use of specific terms like 'hypersomnia' and 'excessive daytime sleepiness'

Coding Guidelines

Usage Guidelines & Examples

Usage guidelines: Differentiate between idiopathic and secondary hypersomnia for accurate coding.
Common errors: Misclassifying hypersomnia as insomnia or not specifying the type.

Code Exclusions

Important Exclusions

Insomnia disorders (G47.00-G47.09)
Sleep apnea (G47.30-G47.39)
Other sleep disorders that may cause excessive daytime sleepiness

Specialty Focus

Primary Specialty

Neurology

Specialty Applications

Adult and pediatric populations with sleep disorders
Neurology clinics, sleep disorder centers, and 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?

Include detailed sleep history, results from sleep studies, and symptom impact on daily life.

Billing considerations?

Ensure accurate coding based on specific type of hypersomnia and associated conditions.

Hypersomnia

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?

Hypersomnia

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

Documentation requirements?

Billing considerations?