The ICD-10-CM code for obstructive sleep apnea (OSA) is G47.33. Here are some additional coding guidelines for coders:
- Code G47.33 should only be used for obstructive sleep apnea, not for central sleep apnea or other types of sleep apnea.
- When coding OSA, it is important to document the severity of the condition. Severity is based on the number of apnea-hypopnea events (AHI) per hour, as measured during a sleep study. The following codes can be used to indicate severity:
- G47.33-0: Mild obstructive sleep apnea, with AHI of 5-14 events per hour
- G47.33-1: Moderate obstructive sleep apnea, with AHI of 15-29 events per hour
- G47.33-2: Severe obstructive sleep apnea, with AHI of 30 or more events per hour
- If a patient has a documented diagnosis of OSA but the severity is not specified, use code G47.33.
- If a patient has both OSA and obesity hypoventilation syndrome (OHS), use two codes:
- G47.33: Obstructive sleep apnea
- E66.2: Obesity hypoventilation syndrome
- If a patient has both OSA and chronic obstructive pulmonary disease (COPD), use two codes:
- G47.33: Obstructive sleep apnea
- J44.1: Chronic obstructive pulmonary disease with (acute) exacerbation
Remember to always consult the official ICD-10-CM guidelines and documentation guidelines from your organization to ensure accurate coding.