ICD-10-CM 2027
ICD-10 code for OHS
Morbid (severe) obesity with alveolar hypoventilation
From the official ICD-10-CM alphabetic index entry “OHS (obesity hypoventilation syndrome)”. Page updated September 29, 2026.
About coding OHS
The ICD-10-CM code for OHS is E66.2 (Morbid (severe) obesity with alveolar hypoventilation).
Within E66 (Overweight and obesity), E66.2 is specifically for Morbid (severe) obesity with alveolar hypoventilation. Related codes cover obesity due to excess calories (E66.0), drug-induced obesity (E66.1), Overweight (E66.3), other obesity (E66.8) and obesity, unspecified (E66.9).
Code first: obesity complicating pregnancy, childbirth and the puerperium, if applicable (O99.21-).
Use an additional code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-).
Common questions about OHS ICD-10 codes
What is the ICD-10 code for OHS?
- E66.2 — Morbid (severe) obesity with alveolar hypoventilation.
Is E66.2 billable?
- Yes. E66.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E66.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E66.2 as a principal diagnosis.
Is E66.2 a CC or MCC?
- E66.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.