ICD-10 Code for Sleep Apnea
The ICD-10 code for obstructive sleep apnea (OSA) is G47.33, while central sleep apnea is coded as G47.31.
Primary Diagnostic Codes
The specific ICD-10 codes for sleep apnea depend on the type:
- G47.33: Obstructive sleep apnea (adult) - the most common form involving upper airway obstruction during sleep 1, 2
- G47.31: Central sleep apnea - characterized by absent or reduced airflow due to withdrawal of respiratory center stimulation 3
- G47.30: Sleep apnea, unspecified - used when the specific type has not been determined
Clinical Context for Coding
When documenting sleep apnea for coding purposes, specify the severity based on the Apnea-Hypopnea Index (AHI):
- Mild OSA: AHI 5-14 events/hour 4, 3
- Moderate OSA: AHI 15-29 events/hour 4, 3
- Severe OSA: AHI ≥30 events/hour 4, 3
The severity classification is critical because it impacts treatment decisions and insurance authorization, with severe OSA (AHI >40) carrying significantly higher perioperative risk 5.
Important Coding Considerations
The diagnosis must be confirmed by polysomnography or home sleep apnea testing before assigning these codes. Clinical suspicion alone (snoring, witnessed apneas, daytime sleepiness) is insufficient for definitive coding 6, 1.
Complex sleep apnea syndrome, which exhibits characteristics of both obstructive and central sleep apnea, may require additional documentation and potentially both codes depending on the predominant pattern 3.
The ICD-10 classification is syndrome-etiologically oriented and designed for practical use by physicians, while more detailed polysomnographic classifications exist for specialists 7.