Is E24 a billable ICD-10-CM code?

No. E24 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E24 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of other endocrine glands (E20-E35).

What cannot be coded together with E24?

E24 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

E24

E24 — Cushing's syndrome

Non-billable headerICD-10-CM

E24 is a non-billable header ICD-10-CM code for cushing's syndrome. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

congenital adrenal hyperplasia (E25.0)

Other codes that can never be billed with E24

These codes carry an Excludes1 note pointing at E24. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E24 alone.

E22Hyperfunction of pituitary gland
E27.0Other adrenocortical overactivity
E34.2Ectopic hormone secretion, not elsewhere classified

Risk adjustment

E24 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 E24

7 child codes. Green means billable.

Questions about E24

Is E24 a billable ICD-10-CM code?: No. E24 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E24 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of other endocrine glands (E20-E35).
What cannot be coded together with E24?: E24 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.