Is E01 a billable ICD-10-CM code?

No. E01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E01 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).

What cannot be coded together with E01?

E01 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.

E01

E01 — Iodine-deficiency related thyroid disorders and allied conditions

Non-billable headerICD-10-CM

E01 is a non-billable header ICD-10-CM code for iodine-deficiency related thyroid disorders and allied conditions. 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 iodine-deficiency syndrome (E00.-)
subclinical iodine-deficiency hypothyroidism (E02)

Risk adjustment

E01 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 history

E01 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead E01

4 child codes. Green means billable.

Questions about E01

Is E01 a billable ICD-10-CM code?: No. E01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E01 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).
What cannot be coded together with E01?: E01 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.