Autosomal dominant hypocalcemia

This code describes a rare genetic disorder characterized by abnormally low levels of calcium in the blood due to a mutation in the calcium-sensing receptor gene. Patients typically present with hypocalcemia, hypercalciuria, and inappropriately normal or low parathyroid hormone levels.

Use this code for patients diagnosed with autosomal dominant hypocalcemia, often identified through genetic testing or a family history of the condition. Documentation should clearly state the diagnosis of autosomal dominant hypocalcemia, distinguishing it from other causes of hypocalcemia.

• Ensure documentation specifies "autosomal dominant" to differentiate from other forms of hypocalcemia.
• Do not confuse with hypoparathyroidism (E20.0) or other unspecified hypocalcemia (E83.51).
• Consider sequencing this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when managing complications.