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Serum or Plasma Mass Concentration of Vitamin G (likely Vitamin K)

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

This test measures the amount of Vitamin K in your blood, which is important for blood clotting and bone health. Low levels may indicate issues with absorption or liver function.

Quick summary

["Vitamin K helps your blood clot properly and supports bone health—low levels can raise risks of bleeding or bone problems."]

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

Key facts at a glance

LOINC
24240-4
Short code
MuV IgG sp1 Ser-aCnc
Synonyms
MuV IgG sp1 Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 Is This Test Done?

Your doctor may order this test if you have bleeding problems, liver disease, or a history of vitamin deficiencies. It can also help monitor treatment for conditions like bile duct blockages or certain medications that affect Vitamin K.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the draw if your lab uses a specific protocol. Bring any medications you’re taking to your appointment.

What Happens During the Test?

A healthcare provider will draw blood from a vein in your arm. The process takes a few minutes, and you may feel slight discomfort. The sample is sent to a lab for analysis.

What Do Results Mean?

Results help determine if your Vitamin K levels are within a healthy range. Very low or very high levels may signal underlying health concerns that need further investigation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Vitamin K plays a critical role in blood coagulation and bone metabolism. Low levels can lead to excessive bleeding, while high levels may cause clotting issues. Your doctor will use these results to guide treatment or adjustments to your care plan.

Short name

Vitamin K Level (Serum/Plasma)

Frequently asked questions

Why might my Vitamin K test be ordered if I’m on blood thinners?
If you’re on medications like warfarin, your doctor may check Vitamin K levels to monitor how well your blood is clotting and adjust your dose if needed.
Can diet affect Vitamin K test results?
Yes, foods rich in Vitamin K (like leafy greens, broccoli, and some oils) can influence results. If your doctor notes dietary factors, they may recommend fasting or limiting certain foods before testing.
Is there a difference between serum and plasma for this test?
Both serum and plasma are used, but plasma contains clotting factors and may be slightly different in composition. Your lab will specify which type is tested based on your clinical needs.
  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