Is E05.3 a billable ICD-10-CM code?

No. E05.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does E05.3 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 E05.3?

E05.3 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E05.3 (E05) and apply to it just the same.

E05.3

E05.3 — Thyrotoxicosis from ectopic thyroid tissue

Non-billable headerICD-10-CM

E05.3 is a non-billable header ICD-10-CM code for thyrotoxicosis from ectopic thyroid tissue. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 inherited from the categories above E05.3

These are not written on E05.3, but they bind it: a note on a category applies to every code beneath it. Billing E05.3 with anything listed here is a denial.

Written on E05 — Thyrotoxicosis [hyperthyroidism]

chronic thyroiditis with transient thyrotoxicosis (E06.2)
neonatal thyrotoxicosis (P72.1)

Risk adjustment

E05.3 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

E05.3 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 E05.3

2 child codes. Green means billable.

Related codes at this level

Codes that share E05. If E05.3 is not quite right, the correct code is usually one of these.

Questions about E05.3

Is E05.3 a billable ICD-10-CM code?: No. E05.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does E05.3 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 E05.3?: E05.3 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E05.3 (E05) and apply to it just the same.