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Creatinine — Turbidimetric, Mass Concentration

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

Measures the concentration of creatinine in a sample. Creatinine is a muscle waste product used to help assess kidney filtration.

Quick summary

["This test helps evaluate kidney function, but results must be interpreted with other clinical findings."]

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

Key facts at a glance

LOINC
111088-1
Short code
PYD/Creat Msmt Ur
Synonyms
PYD/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?

A creatinine test measures the amount of creatinine in a sample. Creatinine is produced by the muscles and is filtered from the blood by the kidneys.

Why might I need this test?

This test may be ordered to assess kidney function, monitor kidney or other chronic disease, and follow certain medications. It may also be used in the evaluation of dehydration or changes in muscle mass.

How is the test performed?

For the turbidimetric method, a laboratory reagent is added to the sample and a special instrument measures how much light is blocked by the reaction. The exact specimen and collection method depend on the order and laboratory.

How do I prepare for the test?

Follow the specimen instructions provided by your healthcare professional. If a blood sample is required, you may be asked to drink fluids normally and avoid unusual heavy exercise shortly before collection.

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 waste product made by muscles and removed by the kidneys.
Does a high creatinine level always mean I have kidney disease?
No. Dehydration, intense exercise, medications, and higher muscle mass can also increase creatinine, so results require clinical interpretation.
Is this the same as a blood urea nitrogen test?
No. They measure different waste products, but both may be used together to evaluate kidney function.
  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