Is E73 a billable ICD-10-CM code?

No. E73 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E73 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).

E73

E73 — Lactose intolerance

Non-billable headerICD-10-CM

E73 is a non-billable header ICD-10-CM code for lactose intolerance. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with E73

These codes carry an Excludes1 note pointing at E73. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E73 alone.

R79Other abnormal findings of blood chemistry
Z91.011Allergy to milk products

Risk adjustment

E73 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead E73

4 child codes. Green means billable.

Questions about E73

Is E73 a billable ICD-10-CM code?: No. E73 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E73 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).