E73 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
E73.0
Congenital lactase deficiency
Billable
10
E73.1
Secondary lactase deficiency
Billable
10
E73.8
Other lactose intolerance
Billable
10
E73.9
Lactose intolerance, unspecified
Billable