240.0
ICD-9-CMThis code represents a non-toxic, non-inflammatory enlargement of the thyroid gland that is not associated with hyperthyroidism or hypothyroidism. It typically presents as a diffuse or nodular swelling in the neck, resulting from insufficient iodine intake or other factors leading to compensatory thyroid growth.
This code is appropriate for documenting a goiter explicitly described as "simple," "nontoxic," or "diffuse colloid." Documentation should clearly indicate the absence of hyperthyroid or hypothyroid states, inflammation, or malignancy. It is often used when the goiter is asymptomatic or causes only cosmetic concerns or mild compressive symptoms.
AI-generated reference — verify against official guidelines