Final answer:
The ICD-10 code for abnormal thyroid function test is R94.6, which applies when thyroid function tests show results outside the normal range, indicating potential thyroid disorders such as hyperthyroidism or hypothyroidism.
Step-by-step explanation:
The ICD-10 code for abnormal thyroid function test is R94.6, which indicates abnormal results of thyroid function studies. In cases where a patient presents with signs and symptoms of abnormal thyroid function — such as in hyperthyroidism or hypothyroidism — specific blood tests are conducted to measure thyroid hormone levels. These tests help determine whether the thyroid is underactive or overactive based on how it accumulates iodine, which is a critical element in thyroid hormone production. Detecting the physiology of the thyroid gland often involves the use of radioactive iodine-131, which helps evaluate how well the thyroid is functioning.
For example, in hyperthyroidism, a clinically abnormal condition, there is an elevated level of thyroid hormone in the blood. The condition is characterized by symptoms such as increased metabolic rate and weight loss. Conversely, hypothyroidism is indicated by a lower level of thyroid hormones, leading to symptoms like fatigue and weight gain. R94.6 effectively captures situations where thyroid function tests fall outside the normal ranges and require further clinical evaluation and management.