Serum/plasma concentration of a substance (unspecified analyte) measured by immunoassay
This test measures the amount of a specific substance in your blood, typically using a blood draw. The result helps healthcare providers assess certain conditions or monitor treatments.
["This test helps track levels of a blood component that may relate to health or disease."]
Key facts at a glance
- LOINC
- 105027-7
- Short code
- OXA23
- Synonyms
- blaOXA-23 Islt/Spm Ql
- Category
- chemistry
- Sample
- serum
- Container
- Sterile, leak-proof container or transport medium specific for molecular diagnostics; blood culture bottles for serum specimens
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 0–120 years
- Method
- molgen
- CPT
- 87798
- SNOMED
- 122450004
- Specimen volume
- 1-3 mL serum; 5-10 mL whole blood collected in EDTA or appropriate transport medium for blood cultures
- Stability
- Refrigerated (2-8°C): up to 48 hours; Frozen (-70°C or lower): up to 30 days for serum; transport to laboratory within 2 hours of collection if at room temperature
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–48 hours
- Order
- routine
Why This Test Might Be Ordered
Your doctor may order this test to evaluate your blood chemistry, diagnose or monitor a medical condition, or check for exposure to certain substances. Common reasons include assessing kidney function, detecting infections, or evaluating metabolic or hormonal imbalances.
How the Test Works
A small sample of your blood is collected and sent to a lab. The lab uses an immunoassay method to detect and measure the specific substance in your serum or plasma. This process identifies how much of the substance is present.
Sample Collection
Blood is drawn from a vein, usually in your arm, using a needle. You may feel a slight pinch, but it typically causes minimal discomfort. The process takes a few minutes, and you can usually return to normal activities afterward.
What to Expect Before the Test
No special preparation is usually needed, but you may be asked to fast for a few hours if the test involves certain substances. Always follow your doctor’s instructions for optimal results.
Reference range
Negative (blaOXA-23 gene not detected)N/A
No special patient preparation required. Collect specimen prior to administration of antibiotics when clinically feasible. Standard aseptic technique should be used for specimen collection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated or low levels of this substance can indicate underlying health issues, such as infections, organ dysfunction, or exposure to toxins. For example, certain substances may signal kidney problems, immune system activity, or metabolic disorders. Your doctor will interpret results in the context of your overall health and symptoms.
Frequently asked questions
What Does a Low Level Mean?
What Does a High Level Mean?
How Often Should I Get This Test?
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