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Creatinine — Mass Concentration, Turbidimetry

Published: August 9, 2026Updated: August 16, 2026

Measures how much creatinine is present in a sample using a turbidimetric method. The abbreviated test code does not clearly identify the specimen type.

Quick summary

["This test measures creatinine, a substance used to help assess kidney function or creatinine excretion."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
110358-9
Short code
Tin/Creat Msmt Ur
Synonyms
Tin/Creat Msmt Ur
Category
kidney
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What is this test?

Creatinine is a waste product made by the muscles and filtered by the kidneys. This laboratory test measures the concentration of creatinine in a submitted sample.

Why might I need this test?

Creatinine may be measured in blood to help evaluate kidney filtering function. It may also be measured in urine to assess how much creatinine the body is excreting.

How is the test performed?

The laboratory uses a turbidimetric method, in which a reagent reacts with creatinine and the resulting cloudiness is measured to determine the concentration.

How do I prepare for the test?

No fasting is usually required. If this is a urine test, follow the collection instructions carefully; a timed collection, such as a 24-hour collection, requires collecting all urine for the specified period.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Creatinine

Frequently asked questions

What does a creatinine test measure?
It measures the concentration of creatinine, a muscle waste product that is removed from the blood by the kidneys.
What does a high or low creatinine result mean?
A high blood creatinine level can be associated with reduced kidney function, while a low level may reflect low muscle mass or other factors. The meaning depends on whether the specimen is blood or urine and on the other results in your report.
Do I need to fast for this test?
Fasting is generally not required for creatinine testing. Follow any specific preparation or urine-collection instructions provided by your healthcare professional.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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