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Follow-Up Immunodeficiency Profile (Serum/Plasma)

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

This test evaluates key markers to assess your immune system’s function and monitor potential deficiencies after initial diagnosis or treatment.

Quick summary

["Helps track immune health and guide ongoing treatment decisions."]

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

Key facts at a glance

LOINC
49120-9
Short code
Immunodeficiency follow-up Pnl Spec FC
Synonyms
Immunodeficiency follow-up Pnl Spec FC
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
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 panel typically includes tests for immune system components such as immunoglobulins (antibodies), complement proteins, and markers of immune cell activity. Specific analytes may include total IgG, IgA, IgM, complement C3/C4, and possibly markers like CRP or cytokines if indicated.

Why It Matters for You

Your immune system relies on a balance of proteins, cells, and responses. Abnormal levels may indicate chronic infections, autoimmune conditions, or treatment-related immune suppression.

Preparation for the Test

No special preparation is needed unless instructed by your healthcare provider. You may fast for 8–12 hours before a blood draw if fasting is required for specific tests in the panel.

What to Expect During Testing

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it usually takes only a few minutes. You can resume normal activities afterward.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps clinicians determine if your immune system remains stable, if deficiencies persist, or if adjustments to treatment (e.g., medications, lifestyle changes) are needed. Early detection of immune dysfunction can prevent complications like recurrent infections or chronic illnesses.

Short name

Immunodeficiency Follow-Up Panel

Frequently asked questions

How often should I expect follow-up tests?
Follow-up frequency depends on your diagnosis and treatment plan. Your doctor will schedule tests based on how your immune system responds to care—typically every 3–12 months or as needed for monitoring.
What if my results are outside normal ranges?
If results show immune system changes, your provider will discuss next steps, which may include additional tests, adjustments to medications, or referrals to specialists like immunologists.
Can diet or supplements affect these test results?
Some immune-related tests may be influenced by certain foods, vitamins, or medications. Always inform your healthcare provider about any supplements or changes in diet before testing.
  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