Postprocedural hypothyroidism

This code describes a condition where the thyroid gland produces insufficient hormones as a direct consequence of a medical procedure. This typically results from surgical removal of all or part of the thyroid, or from radiation therapy affecting the thyroid. The resulting hormonal deficiency can lead to a range of symptoms including fatigue, weight gain, and cold intolerance.

Use this code when documentation clearly links the patient's hypothyroidism to a prior medical intervention, such as thyroidectomy, radioactive iodine therapy, or external beam radiation to the neck. The medical record should specify the procedure and the subsequent development of hypothyroidism. This code is appropriate for both immediate and delayed onset postprocedural hypothyroidism.

• Always sequence this code after the code for the underlying condition or reason for the original procedure, if applicable, or as a primary diagnosis if the hypothyroidism is the focus of the encounter.
• Do not confuse with congenital hypothyroidism (E03.0) or other forms of acquired hypothyroidism not directly linked to a procedure.
• Ensure documentation specifies the postprocedural nature of the hypothyroidism; otherwise, a general hypothyroidism code (e.g., E03.9) may be more appropriate.