Creatstudymaxserplmcnc
A blood test measuring the highest creatinine level in your blood during a study period, used to assess kidney function.
{"Creatinine is a waste product that healthy kidneys filter from blood","Higher than normal levels may indicate kidney problems","This test tracks the maximum creatinine level observed during your study or treatment period","Results help doctors monitor kidney health and adjust treatment if needed"}
Key facts at a glance
- LOINC
- 44784-7
- Short code
- CREA
- Synonyms
- Creat (Study max) SerPl-mCnc
- Category
- kidney
- Sample
- serum
- Container
- Serum separator tube (SST) or plain red top tube. Lithium heparin plasma also acceptable.
- Units
- not specified
- Ref low
- 0.6
- Ref high
- 1.2
- Critical range
- 0.5 not specified – 5 not specified
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- Enzymatic method or Jaffe kinetic method (colorimetric)
- CPT
- 82565
- SNOMED
- 271246004
- Specimen volume
- 1.0-3.0 mL of serum or plasma
- Stability
- Room temperature: 7 days; Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days. Avoid repeated freeze-thaw cycles.
- Hemolysis max
- 50
- Lipemia max
- 300
- Icterus max
- 20
- TAT
- 1–24 hours
- Order
- routine
What is this test?
The Serum Creatinine test measures the amount of creatinine in your blood. Creatinine is a natural waste product produced when your muscles break down. Healthy kidneys filter creatinine out of your blood and remove it through urine. This specific test records the MAXIMUM creatinine level found in your blood samples taken during a study or treatment period.
Why is it important?
Your kidneys are responsible for removing waste and excess fluids from your blood. When kidneys are not working properly, creatinine builds up in your blood. By measuring the maximum creatinine level during your study, doctors can see how well your kidneys are functioning and identify any potential kidney stress or damage.
What happens during the test?
A healthcare professional will take a blood sample from a vein in your arm using a small needle. The sample will be sent to a laboratory for analysis. Multiple blood samples may be taken during your study period, and the highest creatinine value from all these samples will be reported as your result.
How to prepare
Follow any specific instructions given by your healthcare provider. You may need to avoid certain foods or medications before the test. It's important to stay well-hydrated unless otherwise instructed. Tell your doctor about all medications and supplements you are taking.
Reference range
0.6-1.2 mg/dLnot specified
No fasting or special preparation required
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
What is a normal creatinine level?
Does a high creatinine level mean I have kidney disease?
Can I lower my creatinine levels?
Why was the maximum value specifically recorded?
Sources
- 1
- 2
- 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 10, 2026. · Read our editorial policy