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Parathyroid Hormone (PTH) Related Protein Serum Concentration

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

This test measures the level of a protein linked to parathyroid hormone (PTH) in your blood, which can help assess conditions affecting calcium metabolism or kidney function.

Quick summary

["This test may be used to evaluate symptoms related to abnormal calcium levels or kidney disease."]

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

Key facts at a glance

LOINC
15087-0
Short code
PTH Related Prot SerPl-sCnc
Synonyms
PTH Related Prot SerPl-sCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
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 healthcare provider may recommend this test if you have symptoms like bone pain, frequent urination, muscle weakness, or unexplained kidney issues. It could also be part of monitoring for conditions such as hypercalcemia (high calcium) or hypocalcemia (low calcium), or in cases where PTH levels appear abnormal.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the blood draw if your provider specifies it. Wear comfortable clothing and plan to stay near the testing site for a short time.

What the Test Involves

A healthcare professional will draw blood from a vein, typically in your arm. The process is quick and usually painless. You may feel a slight pinch or discomfort, but most people tolerate it well.

What the Results Mean

Results can vary depending on your health status, age, and other factors. Your provider will interpret the results in relation to your overall health and medical history. Elevated levels might suggest conditions like kidney disease or certain cancers, while lower levels could indicate overactive thyroid or other metabolic issues.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: serum

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

PTH-Related Protein (Serum)

Frequently asked questions

What are common symptoms or conditions this test might help diagnose?
This test can help identify conditions affecting calcium balance, such as hypercalcemia (too much calcium in the blood) or hypocalcemia (too little calcium). It may also be useful in monitoring patients with kidney disease or those who have had surgery affecting the parathyroid glands. Elevated levels of PTH-related protein can sometimes be associated with certain cancers or kidney disorders.
How often should I get this test?
The frequency of this test depends entirely on your healthcare provider’s recommendations. They will determine how often you need it based on your symptoms, medical history, and ongoing treatment. Follow-up tests may be scheduled periodically to monitor changes in your condition.
Can I eat or drink before this test?
Generally, no special dietary restrictions apply unless instructed by your provider. However, always follow any specific instructions they give you, such as fasting, to ensure accurate results.
  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