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Vitamin D Binding Protein (DBP) with Serum/Plasma Concentration Measurement

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

This test measures the level of Vitamin D Binding Protein (DBP) in your blood, which helps transport vitamin D and other hormones.

Quick summary

["DBP levels may affect how your body uses vitamin D and other substances."]

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

Key facts at a glance

LOINC
38180-6
Short code
HCV RNA SerPl NAA+probe-Log IU
Synonyms
HCV RNA SerPl NAA+probe-Log IU
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
CPT
86803
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 related to vitamin D metabolism, kidney function concerns, or if you’re being evaluated for conditions like pseudohypoparathyroidism or certain genetic disorders. It may also be part of broader screening for metabolic or hormonal imbalances.

What to Expect Before the Test

During the test, a healthcare professional will insert a small needle into a vein in your arm. You may feel a slight pinch, but the procedure usually takes less than a minute. You’ll be given a bandage afterward to cover the site.

What the Results Mean

Your results will be reviewed by your healthcare provider in the context of your overall health. They may compare your DBP level to reference ranges from your lab, but exact values will depend on your specific clinical situation.

Common Conditions Linked to DBP Levels

Elevated DBP levels might be seen in conditions like nephrotic syndrome (kidney disease causing protein loss) or certain genetic disorders. Lower levels could suggest kidney dysfunction or other metabolic issues, though this is less common.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: DBP’s Role in Health

Short name

DBP Serum/Plasma

Frequently asked questions

What causes DBP levels to be tested?
Your doctor may order this test if you have symptoms like fatigue, muscle weakness, or unexplained high calcium levels. It’s also part of evaluations for conditions like pseudohypoparathyroidism, certain kidney diseases, or metabolic disorders where vitamin D metabolism is suspected.
How long will I need to wait for my results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your healthcare provider will discuss them with you during your follow-up visit.
Can diet or supplements affect DBP levels?
Dietary vitamin D intake or supplements may indirectly influence vitamin D metabolism, but they don’t directly alter DBP levels. However, kidney function—affected by diet and hydration—can impact DBP production. Always follow your provider’s advice regarding supplements or dietary changes.
  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