Insulin, Fluid — Arbitrary Concentration
Measures insulin in a fluid specimen and reports the concentration using arbitrary units. The specific fluid type and laboratory method may vary.
["This test measures the amount of insulin in a fluid sample, but its clinical use depends on the specimen and laboratory method."]
Key facts at a glance
- LOINC
- 29238-3
- Short code
- Insulin Fld-aCnc
- Synonyms
- Insulin Fld-aCnc
- Category
- hormone
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 2.6
- Ref high
- 24.9
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 83525
- SNOMED
- 413618004
- 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 is this test?
This test measures the concentration of insulin in a fluid specimen. The result is reported in arbitrary concentration units, which are intended for comparison within the same laboratory and test method.
Why might I need this test?
Insulin measurement in a fluid may be ordered in specialized clinical situations when blood testing is not appropriate or when information about another fluid is needed. Your healthcare professional can explain why this test was ordered.
How is the test performed?
A laboratory analyzes the submitted fluid using a validated method to measure insulin. Because this test may use different specimen types and methods, results generally should not be compared with a standard blood insulin test.
How do I prepare for the test?
Preparation depends on the exact fluid specimen and the instructions provided by your clinician or laboratory. If the test is not fasting, follow the laboratory's collection and timing instructions carefully.
Reference range
Fasting: 2.6-24.9 μIU/mLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
An insulin concentration outside the laboratory's expected range may reflect changes in insulin production, insulin resistance, medication effects, or other metabolic conditions. Because fluid insulin testing is less standardized than blood testing, interpretation should consider the specimen type, collection conditions, and the laboratory's reference information.
Short name
Insulin, Fluid
Frequently asked questions
Is this the same as a routine blood insulin test?
What does an arbitrary concentration mean?
What can cause an abnormal 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