ICD-10 Code E20.810 – Autosomal dominant hypocalcemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E20.810 – Autosomal dominant hypocalcemia
What it is
Autosomal dominant hypocalcemia is an inherited disorder that causes low blood calcium because the body regulates calcium abnormally. You use this code when the diagnosis is documented as the dominant genetic form.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include signs of hypocalcemia, such as muscle cramps, tingling, or seizures, along with a family history consistent with autosomal dominant inheritance.
When to use this code
Use E20.810 when the provider documents autosomal dominant hypocalcemia, including confirmed genetic or clearly stated inherited disease. This code fits outpatient, inpatient, or problem-list documentation when the dominant form is the stated diagnosis. Check documentation if the record only says hypocalcemia without an inherited cause.
Do not use for
Do not use this code for nonspecific hypocalcemia, postsurgical hypoparathyroidism, or other acquired calcium disorders. If the chart does not identify the autosomal dominant form, check documentation.
Coding tip
Code the inherited diagnosis only when the record clearly links hypocalcemia to autosomal dominant disease.