ICD-10 Code E20.811 – Secondary hypoparathyroidism in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E20.811 – Secondary hypoparathyroidism in diseases classified elsewhere
What it is
This code identifies hypoparathyroidism that develops because of another underlying disease. Use it when the parathyroid problem is secondary, not primary.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include signs of low parathyroid hormone function, but the underlying causative condition should be clear in the record.
When to use this code
Use E20.811 when the provider documents secondary hypoparathyroidism and links it to another disease classified elsewhere. Code the underlying condition first when appropriate, and confirm the causal relationship is stated.
Choose this code for cases where hypoparathyroidism is not the primary disorder. If the note only says “hypoparathyroidism” without a secondary cause, check documentation.
Do not use for
Do not use this code for primary hypoparathyroidism or for unspecified hypoparathyroidism. Avoid it when the record does not identify an underlying disease causing the condition.
Coding tip
Look for wording such as “due to,” “secondary to,” or “in diseases classified elsewhere” before assigning E20.811.