Table 1.

Diagnosis codes and prevalence of obstructive sleep apnea.

Diagnosis Code	Description	% of sleep apnea diagnoses*
327.23	Obstructive sleep apnea	65.6
780.57	Unspecified sleep apnea	19.4
780.53	Hypersomnia with sleep apnea, unspecified	11.7
780.51	Insomnia with sleep apnea, unspecified	1.5
327.2	Organic sleep apnea, unspecified	0.2
278.03	Obesity hypoventilation syndrome	1.7

^*Percentages add to > 100% as a small number of patients carried more than one sleep apnea diagnosis