Serum or plasma **substance concentration** (unspecified analyte) measured by immunoassay (IA)
This test detects a specific substance in your blood using a sensitive immunoassay method. It helps identify certain conditions by measuring the presence or level of a particular protein, hormone, or other molecule.
["This test may help diagnose or monitor conditions related to your specific health concern."]
Key facts at a glance
- LOINC
- 28528-8
- Short code
- NOGOODCHURCHEXPERIENCE
- Synonyms
- —
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- reported-living-hiv
- 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 they suspect an issue involving the substance being measured. Common reasons include evaluating symptoms like unusual fatigue, weight changes, or organ dysfunction, or to monitor a known condition that affects this substance’s levels.
What to Expect Before the Test
No special preparation is typically needed unless instructed by your provider. You may have a small needle inserted into your arm to draw blood. If you’re taking certain medications or have dietary restrictions, let your provider know beforehand.
What the Test Results Mean
Results are interpreted based on your clinical picture and may not have a single standard range. High or low levels could signal potential health issues, such as infections, autoimmune disorders, or metabolic imbalances. Your provider will discuss findings with you.
Common Conditions Monitored
This test may be used to diagnose or track conditions like infections, inflammatory diseases, hormonal imbalances, or certain cancers. For example, it could measure markers for thyroid disorders, kidney function, or immune system activity.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: Interpretation and Context
Frequently asked questions
How is this test performed?
What are typical reference ranges for this test?
Can lifestyle changes affect this test result?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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