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Serum or plasma substance concentration (unspecified analyte) measured by immunoassay

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

This test detects a specific protein or substance in your blood using an immunoassay method. It helps identify conditions related to immune function, inflammation, or other metabolic processes.

Quick summary

["This test measures a key protein or substance that may signal health issues like infections, autoimmune disorders, or organ function problems."]

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

Key facts at a glance

LOINC
74846-7
Short code
SSHV IgM Ser Ql IF
Synonyms
SSHV IgM Ser Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
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

An immunoassay is used to detect and quantify a particular substance in your blood. This method is highly sensitive and often used to identify proteins, hormones, or other biomarkers that may not be easily measured by other lab techniques. The exact substance being tested is not specified here, but it could relate to immune response, inflammation, or other physiological processes.

Why It Might Be Ordered

Your healthcare provider may order this test to diagnose or monitor conditions such as infections, autoimmune diseases (like rheumatoid arthritis), certain cancers, or to assess organ function. It may also be used in research or specialized clinical settings where specific biomarkers are critical.

Sample Collection and Preparation

Blood is collected from a vein in your arm and sent to a lab. The sample is processed into either serum (after clotting) or plasma (anticoagulated blood). This test does not require fasting unless specified by your doctor.

Common Conditions Monitored

This test can help track levels of substances that play roles in immune system activity, inflammation markers, or other metabolic pathways. For example, it might be used to monitor immune responses, detect hidden infections, or evaluate conditions affecting protein synthesis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What Does a Positive or Abnormal Result Mean?
An abnormal result doesn’t necessarily mean you have a specific condition. It may require further testing or evaluation by your doctor to understand the cause and next steps. Your provider will consider your symptoms, medical history, and other test results before making a diagnosis.
How Often Should I Get This Test?
The frequency of this test depends on your medical condition and treatment plan. Some patients may need it monthly, quarterly, or annually, while others may only need it once. Follow your healthcare provider’s instructions or schedule based on your treatment plan.
Can I Eat or Drink Before This Test?
Unless your doctor specifies otherwise, you can usually eat and drink normally before this blood test. Some tests may require fasting, but this one does not. Always check with your provider for any specific instructions.
  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