Parathyroid Hormone (Intact)
This test measures the total amount of parathyroid hormone (PTH) in your blood, including all active forms of the hormone. PTH plays a key role in regulating calcium and phosphate levels in your body.
["PTH helps maintain healthy bone and mineral balance, and abnormal levels may signal conditions like hypoparathyroidism or hyperparathyroidism."]
Key facts at a glance
- LOINC
- 47752-1
- Short code
- GH 1.5h p Arg SerPl-aCnc
- Synonyms
- GH 1.5h p Arg SerPl-aCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your doctor may recommend this test if you have symptoms like muscle weakness, bone pain, or frequent bone fractures. It could also be used to diagnose or monitor conditions such as hypocalcemia (low calcium), hypercalcemia (high calcium), or kidney disease. Additionally, it may be part of a routine check for those with a history of thyroid or parathyroid disorders.
What to Expect Before the Test
No special preparation is needed for this blood test. You may be asked to fast for 8–12 hours before the draw, but this is not always required. Wear comfortable clothing and bring any medications you’re currently taking, as some may affect results.
What Happens During the Test
A healthcare professional will draw blood from a vein in your arm using a small needle. You may feel a slight pinch, but it usually takes only a few seconds. The site will be cleaned and bandaged afterward.
What the Results Mean
Results are interpreted by your doctor based on your symptoms, medical history, and other lab tests. Low PTH levels may indicate underactive parathyroid glands, while high levels could suggest overactive glands or other conditions affecting calcium metabolism.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Intact PTH
Frequently asked questions
How long does it take to get my results?
Can I eat or drink anything before this test?
What are common symptoms linked to abnormal PTH levels?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy