Parathyroid Hormone (PTH) Test

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About Our Parathyroid Hormone (PTH) Test

The Parathyroid Hormone, or PTH, test measures the level of parathyroid hormone in your blood. PTH is produced by the parathyroid glands, four small glands located behind the thyroid, and plays a crucial role in regulating calcium levels in the body. Maintaining proper calcium balance is essential for bone strength, muscle function, nerve signaling, and heart rhythm.

PTH works by controlling the levels of calcium, phosphorus, and vitamin D in the bloodstream. When blood calcium levels drop, the parathyroid glands release more PTH to restore balance. This hormone signals bones to release calcium, prompts the kidneys to conserve calcium and excrete phosphorus, and supports increased calcium absorption from the digestive tract.

Abnormal PTH levels may indicate parathyroid disease or disorders involving calcium imbalance. Overactive parathyroid glands, known as hyperparathyroidism, can cause elevated calcium levels and lead to bone loss, kidney stones, and fatigue. Underactive parathyroid glands, known as hypoparathyroidism, may result in low calcium levels, muscle cramps, tingling sensations, and irregular heart rhythms.

The PTH test is also commonly used to evaluate calcium abnormalities and monitor patients with chronic kidney disease or those undergoing renal dialysis. Because kidney function directly influences calcium and phosphorus balance, monitoring PTH helps guide treatment and prevent complications.

What Is Included In This Test?

This test includes:

Measurement of Parathyroid Hormone levels in the blood
Clear numerical results for clinical interpretation

This test measures intact PTH and is often interpreted alongside calcium and phosphorus levels for a complete evaluation.

Why Does This Test Matter?

Calcium balance is essential for bone health, muscle contraction, and nerve function. PTH plays a central role in maintaining this balance.

Elevated PTH levels may indicate hyperparathyroidism, which can lead to bone weakening, kidney stones, abdominal discomfort, and fatigue. Identifying high levels early allows for timely intervention and protection of bone health.

Low PTH levels may signal hypoparathyroidism, a condition that can cause low calcium levels and symptoms such as muscle spasms, tingling in the hands and feet, and irregular heart rhythms.

For individuals with kidney disease, PTH testing is especially important. Impaired kidney function can disrupt calcium and phosphorus regulation, leading to secondary hyperparathyroidism. Monitoring PTH helps guide proper treatment and prevent long term complications.

Who Should Consider This Test?

You may consider this test if you:

Have abnormal calcium levels
Experience kidney stones
Have unexplained bone loss or fractures
Experience muscle cramps or tingling sensations
Have chronic kidney disease
Are undergoing renal dialysis
Have symptoms of hypercalcemia such as fatigue or frequent urination
Have symptoms of hypocalcemia such as muscle spasms
Are being evaluated for parathyroid disease
Have a history of endocrine disorders

Convenient, No-Appointment Testing

To complete your test:

Order online through our website
Use the lab locator to find a nearby testing location
Walk in; no appointment required
Access your results securely in your HealthLabs.com account within one to three business days

110% Price Guarantee!

If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.

Common Questions:

What does PTH regulate?

PTH regulates calcium, phosphorus, and vitamin D levels in the blood.

What does a high PTH level mean?

High levels may indicate hyperparathyroidism or a response to low calcium levels.

Will anyone see my results besides me?

Your results are stored in your secure online account. They are not shared with anyone else. If you choose, you can print or download them to share with your own doctor.

Do I need to fast before this test?

Fasting is not required for this panel. You can eat and drink normally unless your doctor has given you other instructions.

Can I talk to someone about my results?

Yes. If your results come back abnormal or if you simply have questions, our team is here to support you. You can text our Patient Services team at 1800-579-3914.

Can I use insurance to pay for this test?

In order to ensure your privacy, we do not bill insurance directly, but you may use HSA or FSA funds. This keeps your results and testing completely private from insurers. We can also provide you with an itemized receipt for insurance reimbursement purposes if you need it.