Postpartum thyroiditis

This code represents an inflammatory condition of the thyroid gland that occurs after childbirth, typically within the first year postpartum. It often presents with a transient hyperthyroid phase followed by a hypothyroid phase, though some patients may only experience one phase.

Apply this code for patients diagnosed with thyroiditis specifically occurring in the postpartum period. Documentation should clearly indicate the onset of thyroid dysfunction after delivery, often supported by thyroid function tests (e.g., TSH, free T4) and clinical symptoms.

• Distinguish from other forms of thyroiditis (e.g., Hashimoto's, subacute thyroiditis) not related to the postpartum period.
• Code any associated symptoms or complications, such as hyperthyroidism (E05.-) or hypothyroidism (E03.-), as secondary diagnoses.
• Ensure the medical record specifies the postpartum timing of the thyroiditis diagnosis.