Idiopathic hypoparathyroidism

This code represents a rare endocrine disorder characterized by insufficient production of parathyroid hormone (PTH) due to an unknown cause. This deficiency leads to hypocalcemia and hyperphosphatemia, affecting various bodily functions, particularly neuromuscular and cardiovascular systems.

This code is appropriate when documentation clearly indicates a diagnosis of hypoparathyroidism where no secondary cause (e.g., surgery, autoimmune disease, genetic defect) has been identified. It should be used when the physician explicitly states "idiopathic hypoparathyroidism" or when extensive workup has ruled out other etiologies.

• Ensure documentation explicitly states "idiopathic" or "unknown cause" for hypoparathyroidism.
• Do not confuse with hypoparathyroidism due to surgical removal (e.g., thyroidectomy), which would require a different code.
• Always sequence this code as the primary diagnosis if it is the reason for the encounter.