E03.9: Hypothyroidism, unspecified
This code is used when the healthcare provider does not specify which type of hypothyroidism the patient has.
E03.0: Congenital hypothyroidism with diffuse goiter
This code is used when the patient has congenital hypothyroidism and a diffuse goiter.
E03.1: Congenital hypothyroidism without goiter
This code is used when the patient has congenital hypothyroidism without a goiter.
E03.2: Hypothyroidism due to medicaments and other exogenous substances
This code is used when the patient’s hypothyroidism is caused by medication or another substance.
E03.3: Postinfectious hypothyroidism
This code is used when the patient’s hypothyroidism is caused by a previous infection.
E03.4: Atrophy of thyroid (acquired)
This code is used when the patient’s hypothyroidism is caused by the atrophy of the thyroid gland.
E03.5: Myxedema coma
This code is used when the patient has myxedema coma, a rare, life-threatening complication of hypothyroidism.
E03.8: Other specified hypothyroidism
This code is used when the healthcare provider specifies a type of hypothyroidism that is not covered by any of the above codes.
In addition to these codes, there are also codes for hyperthyroidism (overactive thyroid) and thyroiditis (inflammation of the thyroid gland).
It is important for coders to review the patient’s medical record carefully to ensure that they select the most accurate ICD-10 code for the patient’s condition.