Serum or plasma substance concentration (qualitative) for a renal marker (e.g., protein or metabolite)
This test checks for the presence of certain substances in your blood that may indicate kidney function or potential kidney-related issues, such as protein loss or metabolic byproducts.
["Helps identify early kidney problems or abnormalities in blood chemistry that may require further evaluation."]
Key facts at a glance
- LOINC
- 42441-6
- Short code
- XR Neck Mag
- Synonyms
- XR Neck Mag
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 22
- Ref high
- 198
- Critical range
- — – 10000 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- xr
- CPT
- 82553
- 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 test detects specific substances in your blood that could signal kidney function concerns. While the exact substance isn’t specified, it may include proteins, small molecules, or metabolites that are processed by the kidneys. Some examples could involve proteinuria (protein in urine-like substances) or abnormal metabolites that accumulate when kidneys aren’t working properly.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like swelling, fatigue, changes in urine appearance, or if they suspect kidney disease, chronic illness, or exposure to toxins that could affect kidney function.
Common Reasons for Testing
Tests like this are often used in routine check-ups for patients with risk factors (e.g., diabetes, hypertension), during monitoring of chronic conditions, or after exposure to substances that may harm kidneys.
Sample Collection and Preparation
A blood sample is drawn from a vein, typically in your arm. The blood is then processed to separate serum or plasma for testing. This process is quick and usually done in a lab setting.
Reference range
Adult males: 22-198 U/L; Females: 22-198 U/LN/A
No special preparation required. Inform provider of any chest pain or symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal results may indicate kidney dysfunction, metabolic disorders, or other systemic conditions. While qualitative tests don’t provide exact measurements, they can flag areas for further investigation, such as additional lab tests, imaging, or medical evaluation to determine the cause and guide treatment.
Short name
Qualitative renal protein/metabolite screen
Frequently asked questions
What does a positive or abnormal result mean?
How long will I need to prepare for this test?
Can I take any medications before 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 17, 2026. · Read our editorial policy