Secondary hyperparathyroidism, not elsewhere classified

This code represents an elevated parathyroid hormone (PTH) level due to a chronic condition other than kidney disease. It signifies the parathyroid glands are overactive in response to prolonged hypocalcemia or other stimuli, but not directly caused by renal dysfunction.

Apply this code when documentation indicates secondary hyperparathyroidism stemming from conditions like malabsorption syndromes, vitamin D deficiency (nutritional or metabolic), or certain medications, and explicitly rules out renal involvement. Ensure the physician's notes clearly state the underlying cause is not kidney-related.

• Always review documentation for the underlying cause of the secondary hyperparathyroidism.
• Do not use this code if the hyperparathyroidism is due to chronic kidney disease; refer to the Excludes1 note.
• Code the underlying condition causing the secondary hyperparathyroidism first, followed by this code.