Serum or Plasma Creatinine Concentration (Mass Concentration)
This test measures the amount of creatinine, a waste product from muscle metabolism, in your blood or plasma. It helps assess how well your kidneys are filtering blood.
["A creatinine test helps check kidney function by tracking waste removal from your blood."]
Key facts at a glance
- LOINC
- 51454-7
- Short code
- EBV EA-D Ab CSF Ql
- Synonyms
- EBV EA-D Ab CSF Ql
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters
Creatinine levels can indicate how well your kidneys are working. High levels may suggest kidney damage or disease, while low levels could indicate dehydration or other conditions. Your doctor may order this test to monitor kidney health before procedures, during treatment for certain conditions, or as part of routine health checks.
What to Expect Before the Test
You may be asked to fast for a few hours before the test, but this isn’t always required. Bring any medications you’re currently taking, as some may affect results. Avoid strenuous activity or excessive fluids 24 hours before testing if instructed.
During the Test
A healthcare provider will draw blood from a vein in your arm. You may feel slight discomfort, but it usually lasts only a few minutes. No special preparation is needed beyond what your doctor specifies.
What the Results Mean
Results are compared to a general reference range, but individual ranges can vary based on age, sex, and overall health. High creatinine levels may signal kidney issues, while very low levels could indicate dehydration or other health concerns. Your doctor will interpret results in the context of your medical history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Creatinine levels are a key marker for kidney function. Elevated levels often point to reduced kidney filtration, which can be caused by conditions like diabetes, hypertension, or kidney disease. It’s also used to monitor kidney function during treatments for conditions like chemotherapy or certain medications. Low levels may require further investigation to rule out dehydration or other metabolic issues.
Short name
Creatinine Level
Frequently asked questions
How often should I get this test?
Can diet or medications affect creatinine levels?
What if my results are outside the normal range?
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