Other specified hypothyroidism

This code represents forms of hypothyroidism that are clearly documented but do not fit into the more specific categories of congenital, iodine-deficiency related, post-procedural, or drug-induced hypothyroidism. It encompasses various less common or atypical presentations of underactive thyroid function.

Use this code when the physician's documentation specifies a type of hypothyroidism that is not classifiable to other E03 subcategories, such as central hypothyroidism or secondary hypothyroidism due to pituitary dysfunction. Supporting documentation should clearly state the specific type of hypothyroidism that falls outside the more defined categories.

• Do not use this code for unspecified hypothyroidism; use E03.9 for that scenario.
• Always review documentation for specific causes (e.g., congenital, drug-induced, post-ablative) before assigning this code.
• Consider sequencing if the hypothyroidism is secondary to another endocrine disorder, with the underlying condition often coded first.