Skip to content

Serum or plasma mass concentration of a specific protein marker (likely related to renal function or metabolic screening)

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

This test measures the amount of a particular substance in your blood, which may help assess kidney function, protein metabolism, or other metabolic processes.

Quick summary

["Understanding your blood substance levels can help your doctor diagnose or monitor health conditions."]

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

Key facts at a glance

LOINC
56369-2
Short code
False ragweed IgG4-mCnc
Synonyms
False ragweed IgG4-mCnc
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

What This Test Measures

This test quantifies a specific protein or metabolite in your blood, often used to evaluate how well your kidneys filter waste or to check for metabolic imbalances. The exact substance may relate to markers like creatinine, urea, or other metabolic byproducts.

Why It’s Ordered

Your doctor may recommend this test if you have symptoms like fatigue, swelling, frequent urination, or if they suspect kidney disease, metabolic disorders, or other health concerns. It can also be part of routine health checks or monitoring for chronic conditions.

Sample Collection and Preparation

A blood sample is drawn from a vein, usually in your arm. The blood is processed to separate serum or plasma for testing. You may be asked to fast before the test if instructed by your healthcare provider.

What to Expect Before the Test

No special preparation is typically required unless specified by your doctor. Wear comfortable clothing and plan to rest after the draw. Avoid strenuous activity before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What does a high or low result mean?
A high result may suggest kidney issues, fluid retention, or metabolic disorders. A low result could indicate dehydration, overhydration, or other conditions. Your doctor will discuss these findings with you based on your medical history and symptoms.
How often should I get this test?
Frequency depends on your health status. Routine tests may be done annually or as needed for monitoring chronic conditions. Follow your doctor’s recommendations for timing and repeat testing.
Is there anything I should avoid before the test?
Avoid excessive alcohol, certain medications, or foods that may affect blood levels (if instructed). Fast if required, and inform your doctor about all medications or supplements you take.
  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