Serum or plasma mass concentration of creatinine
This test measures the amount of creatinine, a waste product from muscle metabolism, in your blood. It helps assess kidney function.
["A creatinine test helps check how well your kidneys are filtering blood."]
Key facts at a glance
- LOINC
- 35588-3
- Short code
- EGDN Bld-mCnc
- Synonyms
- EGDN Bld-mCnc
- Category
- glucose
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Your doctor may order this test to monitor kidney health, especially if you have symptoms like swelling, fatigue, or changes in urine output. It’s also used before surgeries, during pregnancy, or if you have conditions like diabetes or high blood pressure that can affect kidney function.
What to Expect Before the Test
No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves drawing blood from a vein. Stay hydrated unless instructed otherwise.
What Happens During the Test
A healthcare provider will take a blood sample from a vein in your arm. You may feel a slight pinch, but it’s quick and painless. The sample is then sent to a lab for analysis.
What the Results Mean
Results are compared to a general reference range, but individual ranges can vary by lab. High levels may indicate kidney problems, while low levels could suggest muscle breakdown or other conditions. Your doctor will interpret results in the context of your overall health.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Creatinine Level
Frequently asked questions
How often should I get this test?
If your results are outside the expected range, your doctor may recommend further tests or adjustments to your treatment plan. They’ll discuss next steps with you, such as lifestyle changes or additional monitoring.
Yes, certain foods (like red meat) and fluids can temporarily influence creatinine levels. Avoiding excessive protein or salt 24 hours before the test may help ensure more accurate results. Always follow your doctor’s specific instructions.
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