Parathyroid Hormone (PTH)

Clinical definition of the Parathyroid hormone test
It is a protein hormone released by the parathyroid gland and regulates body’s calcium and phosphorus levels. Release of PTH is controlled by the level of calcium in the blood. It acts to increase the concentration of calcium in the blood.

Why is the Parathyroid hormone test done?
A Parathyroid hormone (PTH) test measures the level of parathyroid hormone in the blood. This test is done to identify hyperparathyroidism and to find the cause of abnormal calcium levels. It also monitors the effectiveness of treatment when a person has a parathyroid related condition.  Too high or too low PTH levels cause problems with the kidneys and bones and cause changes in calcium and vitamin D levels.

What are the common signs/symptoms when the Parathyroid hormone test is done?

  • Fatigue
  • Nausea
  • Thirst
  • Abdominal pain
  • Muscle cramps
  • Tingling fingers

What should I do before the Parathyroid hormone test?

Specimen type

Specimen collection procedure

Preparatory instructions before the test *

Serum (Blood Sample)


Collection of blood from a vein, usually from the arm

Fasting samples have to be collected after a minimum 8 hour overnight fasting status.

Clear fluids like water is allowed during this period. Refrain from consumption of early morning beverages like tea, coffee and milk until specimen collection is completed.

You should not drink alcohol for 48 hours prior to the test.

* Subjects suffering from any illness or on oral or injectable medications are advised to consult their physician prior to requesting any tests or procedures.

How do I interpret my Parathyroid hormone test results?

 Reference range





11.1 to 79.5  pg/ml.



11.1 to  79.5  pg/ml.



11.1 to 79.5 pg/ml.


‘*A Reference range is a set of values which helps the healthcare professional to interpret a medical test. It may vary with age, gender, and other factors. Reference ranges may also vary between labs, in value & units depending on instruments used and method of establishment of reference ranges’

Diseases/conditions related to the Parathyroid hormone test

  • Hypocalcaemia
  • Hypercalcaemia
  • Kidney Disease And/or Failure

Other tests related to the Parathyroid hormone test

  • Calcium
  • Phosphorus
  • Magnesium
  • Vitamin D

Book Related Tests
  • Free T3, Free T4, TSH (FT3, FT4, TSH) (Thyroid Panel)
  • T3,T4,TSH (Thyroid Panel)
  • TSH (Thyroid Stimulating Hormone)
  • T3 (Total)
  • Free T3 (FT3)
  • Free T4 (FT4)
  • T4 (Total)

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