Familial Isolated Hypoparathyroidism (FIH)

The autosomal dominant form of Familial isolated hypoparathyroidism (FIH) is characterized by hypocalcemia and hyperphosphatemia due to inadequate secretion of parathyroid hormone (PTH). Symptoms are seizures, tetany and muscle cramps.

Tests Available

Forms and Documents

Test Details

  • Distinguish FHH from primary hyperparathyroidism and other disorders of calcium homeostasis
  • Confirmation of a clinical diagnosis
  • To determine appropriate treatment, including avoidance of parathyroidectomy in FHH patients
  • Prenatal diagnosis in pregnancies at-risk for NSHPT


4 weeks
2-5 mL Blood - Lavender Top Tube
Buccal Swabs | Dried Blood Spots

*Reporting times are typical, but could be extended in situations outside GeneDx's reasonable control.


  • 275.4 Disorders of calcium metabolism
For price inquiries please email zebras@genedx.com

**The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.


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