ICD-10 Code E20 – Hypoparathyroidism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E20 – Hypoparathyroidism
What it is
Use this code for hypoparathyroidism, a condition where the parathyroid glands do not produce enough hormone. It leads to impaired calcium regulation and may be chronic or acquired.
Clinical signs
Typical findings include muscle cramps, tingling, tetany, or other signs of low calcium. Clinical features vary; refer to documentation for the specific type and cause.
When to use this code
Assign E20 when the record documents hypoparathyroidism as the diagnosis, including postsurgical, autoimmune, congenital, or idiopathic forms if not coded elsewhere. Use the provider’s wording to confirm the condition is present and not just suspected.
If the chart identifies a specific subtype, code that documented subtype when available. Check documentation when hypocalcemia is present but hypoparathyroidism is not clearly stated.
Do not use for
Do not use E20 for hypocalcemia without documented hypoparathyroidism. Also avoid it when the problem is another parathyroid disorder or the diagnosis is only being ruled out.
Coding tip
Confirm the provider documents hypoparathyroidism itself, and capture any stated cause or subtype if the record supports it.