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Parathyroid Hormone (Intact) - Serum

Published: August 9, 2026Updated: August 16, 2026

This test measures the total amount of parathyroid hormone (PTH) in your blood, including all active forms of the hormone. It helps assess your calcium and bone health.

Quick summary

["Intact PTH helps regulate calcium levels and supports bone metabolism."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
47760-4
Short code
GH 1h p Arg SerPl-aCnc
Synonyms
GH 1h 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 Is Done

Your doctor may order this test if you have symptoms like bone pain, frequent fractures, or unexplained kidney stones. It’s also used to diagnose or monitor conditions like hypoparathyroidism, hyperparathyroidism, or kidney disease.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or hand to draw blood. If you’re on blood thinners, let your doctor know before the test.

What the Test Results Mean

Higher than expected levels may suggest hyperparathyroidism, while lower levels could indicate hypoparathyroidism or other health issues. Your doctor will interpret results in relation to your symptoms and medical history.

Common Conditions Linked to PTH Levels

Abnormal PTH levels can be linked to conditions like kidney disease, vitamin D deficiency, or certain cancers. Your doctor will use the results to guide treatment plans.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Intact PTH

Frequently asked questions

Why might my doctor want to check my PTH levels?
Your doctor may recommend this test if you have symptoms of calcium imbalance, bone problems, or kidney issues, or if you’re being treated for conditions like hypercalcemia or hypocalcemia.
What are the typical reference ranges for PTH?
Reference ranges vary by lab and can depend on age, sex, and health status. Your doctor will provide your specific results and explain what they mean for you.
Can diet or supplements affect PTH test results?
Certain foods (like calcium or vitamin D) or supplements can influence calcium levels, which may indirectly affect PTH. Always follow your doctor’s advice on timing your test with meals or medications.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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