Postinfectious hypothyroidism
ICD-10 E03.3 is a billable code used to indicate a diagnosis of postinfectious hypothyroidism.
Postinfectious hypothyroidism is a condition characterized by an underactive thyroid gland (hypothyroidism) that occurs following a viral or bacterial infection. This condition can arise after infections such as viral hepatitis, mumps, or other systemic viral illnesses that may lead to thyroiditis, an inflammation of the thyroid gland. The inflammation can disrupt the normal production of thyroid hormones, leading to symptoms such as fatigue, weight gain, cold intolerance, and depression. Diagnosis typically involves thyroid function tests, including serum levels of Thyroid Stimulating Hormone (TSH) and free thyroxine (FT4). Elevated TSH levels with low FT4 levels indicate hypothyroidism. Management may include thyroid hormone replacement therapy, and monitoring of thyroid function tests is essential to ensure appropriate dosing. The prognosis is generally good with treatment, although some patients may require lifelong management. Understanding the underlying infectious etiology is crucial for effective treatment and patient education.
Thorough documentation of thyroid function tests, patient history of infections, and treatment plans.
Patients presenting with fatigue, weight gain, and abnormal thyroid function tests following a viral illness.
Endocrinologists should ensure clear documentation linking the infection to thyroid dysfunction.
Complete patient history, including symptoms and any recent infections.
Patients with unexplained fatigue or weight changes after a recent illness.
Primary care providers should be vigilant in recognizing the signs of postinfectious hypothyroidism.
Used to confirm diagnosis of hypothyroidism.
Document the reason for the test and results.
Endocrinologists should ensure TSH tests are linked to clinical symptoms.
Common symptoms include fatigue, weight gain, cold intolerance, depression, and dry skin. These symptoms may develop after a recent viral or bacterial infection.
