ICD-10 Guide

Nocturnal Hypoxemia

ICD-10 Coding for Nocturnal Hypoxemia(G47.36, R09.02)

PRIMARY SPECIALTYPulmonology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Nocturnal Hypoxemia?

Essential facts and insights about Nocturnal Hypoxemia

Key Clinical Considerations:

Nocturnal oxygen saturation levels below 90%
Symptoms of sleep apnea, such as loud snoring or gasping during sleep
Daytime fatigue or sleepiness

Clinical Information

Clinical Criteria & Documentation Requirements

Patient history of respiratory conditions
Results from overnight oximetry or polysomnography
Evidence of daytime hypoxemia or related symptoms

Coding Guidelines

Usage Guidelines & Examples

Follow usage guidelines for sleep apnea and hypoxemia coding.
Common errors include misclassifying the severity of hypoxemia.

Code Exclusions

Important Exclusions

Acute respiratory failure (J96.0)
Other sleep disorders not related to hypoxemia

Specialty Focus

Primary Specialty

Pulmonology

Specialty Applications

Patients with chronic respiratory diseases, obesity, or sleep disorders
Pulmonology clinics, sleep medicine centers

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?

Document patient history, symptoms, and results of diagnostic tests.

What are the billing considerations?

Ensure accurate coding based on diagnostic tests and patient symptoms.

Nocturnal Hypoxemia

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

What are the documentation requirements?

What are the billing considerations?

Nocturnal Hypoxemia

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

What are the documentation requirements?

What are the billing considerations?