ICD-10 Code E89.0 – Postprocedural hypothyroidism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E89.0 – Postprocedural hypothyroidism
What it is
Postprocedural hypothyroidism is thyroid hormone deficiency that develops after a medical procedure, most often thyroid surgery or ablation. Use this code when the hypothyroid state is documented as a direct result of the procedure.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include fatigue, weight gain, cold intolerance, constipation, and slowed mental or physical activity, but the chart should support the diagnosis.
When to use this code
Use E89.0 when the provider documents hypothyroidism due to a prior procedure, such as thyroidectomy or radioactive treatment. It also fits postoperative follow-up notes that clearly identify the condition as postprocedural. If the record only says “hypothyroidism,” check documentation for cause.
Do not use for
Do not use this code for unspecified primary hypothyroidism or for thyroid dysfunction unrelated to a procedure. If the chart shows another cause, code that condition instead.
Coding tip
Link the hypothyroidism to the procedure in the documentation before assigning E89.0.