HormonesUpdated 2025-12-24Medically Reviewed
PTH (Parathyroid Hormone)
Everything you need to know about PTH (Parathyroid Hormone) levels, including what normal ranges look like and what abnormal results might indicate.
Standard Reference Range
Unit: pg/mLMale Reference Range
15–65 pg/mL
Female Reference Range
15–65 pg/mL
i
Reference ranges may vary slightly between laboratories. Always consult your doctor for interpretation.
What is PTH?
Parathyroid hormone (PTH) regulates calcium and phosphorus balance. It rises when calcium falls and drops when calcium is high.
Key Takeaway
Interpret PTH together with calcium; the pairing distinguishes primary hyperparathyroidism, secondary causes, and hypoparathyroidism.
Why is this test performed?
- Evaluate high or low calcium
- Diagnose hyperparathyroidism or hypoparathyroidism
- Monitor chronic kidney disease mineral bone disorder (CKD-MBD)
Interpreting Your Results
- High PTH + High Calcium: Primary hyperparathyroidism
- High PTH + Low/Normal Calcium: Vitamin D deficiency or CKD
- Low PTH + High Calcium: Malignancy-related hypercalcemia or vitamin D excess
- Low PTH + Low Calcium: Hypoparathyroidism
Related Tests
- Calcium / Ionized Calcium: Directly controlled by PTH
- Vitamin D: Low vitamin D drives PTH up
- Phosphorus: Moves inversely to PTH
Decode your Parathyroid Hormone, Intact Results
Upload your PDF report to WellAlly. AI will visualize your trends and provide personalized health insights instantly.