Drug-induced thyroiditis

This code represents inflammation of the thyroid gland caused by an adverse reaction to a medication. It encompasses various forms of drug-induced thyroid dysfunction, including hyperthyroidism, hypothyroidism, or a biphasic course, directly attributable to pharmaceutical agents.

Use this code when documentation clearly links thyroiditis to a specific drug, such as amiodarone, interferon-alpha, or lithium. The patient's medical record should detail the drug exposure and the subsequent onset of thyroid inflammation or dysfunction.

• Always identify the specific drug causing the thyroiditis using an additional code from the T36-T50 range, if known.
• Distinguish from other forms of thyroiditis (e.g., autoimmune, infectious) where a drug etiology is not present.
• Ensure the documentation specifies "drug-induced" to support the use of this code.