ICD-10 Code E20.81 – Hypoparathyroidism due to impaired parathyroid hormone secretion (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E20.81 – Hypoparathyroidism due to impaired parathyroid hormone secretion
What it is
This code identifies hypoparathyroidism caused by reduced secretion of parathyroid hormone. Use it when documentation states the glands make too little hormone, leading to impaired calcium regulation.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include signs of low calcium related to parathyroid hormone deficiency, such as neuromuscular irritability or tetany.
When to use this code
Use E20.81 when the provider documents hypoparathyroidism specifically due to impaired parathyroid hormone secretion. It fits cases where the cause is intrinsic gland undersecretion rather than surgical removal or another specified cause. If the record is unclear, check documentation.
Do not use for
Do not use this code for postoperative hypoparathyroidism, accidental parathyroid injury, or other documented causes with separate codes. If the chart does not specify impaired secretion, check documentation.
Coding tip
Assign E20.81 only when the provider links hypoparathyroidism to impaired hormone secretion in the record.