Skip to content

Protein Inhibitor Profile (Plasma) – Mass Concentration

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

This test measures the levels of specific proteins in your blood that can inhibit certain laboratory tests, such as coagulation assays. These inhibitors may affect how blood clotting is assessed.

Quick summary

["Your results help ensure accurate diagnosis and treatment of conditions related to blood clotting or other lab tests."]

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

Key facts at a glance

LOINC
6010-3
Short code
Prot C Inhib PPP IA-mCnc
Synonyms
Prot C Inhib PPP IA-mCnc
Category
chemistry
Sample
plasma
Container
Lavender-top (EDTA) or Green-top (Heparin)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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 Is Done

Your healthcare provider may order this test if you have abnormal results in blood clotting studies (like PT/INR or aPTT) that don’t match your medical history or symptoms. It can also be used to rule out interference from proteins that mimic or block normal lab findings.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood, which usually takes a few minutes. If you’re on blood thinners, let your provider know before the test.

What the Results Mean

If inhibitors are found, they may explain why certain lab tests (like clotting studies) show unexpected results. Your provider will discuss next steps, such as retesting or adjusting your treatment.

Common Conditions Monitored

This test is often used in patients with unexplained bleeding or clotting disorders, those receiving blood transfusions, or individuals with repeated abnormal lab results that don’t align with their symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Protein Inhibitor Panel

Frequently asked questions

What causes protein inhibitors to appear in blood?
Protein inhibitors can develop due to certain medical conditions (e.g., autoimmune diseases), exposure to blood products, or rare genetic factors. They may also appear after blood transfusions or in patients with chronic kidney disease.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will contact you once they’re ready.
Can I fast before this test?
No fasting is required for this test, as it involves drawing blood for protein analysis. However, always follow your provider’s specific instructions for your appointment.
  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