Iodine-deficiency related diffuse (endemic) goiter

This code signifies an enlargement of the thyroid gland (goiter) that is directly caused by insufficient dietary iodine intake. The goiter is typically diffuse, meaning the entire gland is enlarged rather than having distinct nodules, and is often endemic, indicating a high prevalence within a specific geographic population due to environmental iodine deficiency.

Apply this code when documentation clearly states a diagnosis of goiter due to iodine deficiency, particularly in regions known for endemic iodine insufficiency. Supporting documentation should include clinical findings of thyroid enlargement and, ideally, laboratory evidence of iodine deficiency or a history consistent with inadequate iodine intake.

• Differentiate from other types of goiter (e.g., toxic, multinodular) which have distinct codes.
• Ensure documentation explicitly links the goiter to iodine deficiency; simply stating "goiter" is insufficient.
• Consider co-reporting with codes for iodine deficiency if separately documented and treated.