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Serum or plasma mass concentration of creatinine

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

This test measures the amount of creatinine, a waste product from muscle metabolism, in your blood. It helps assess kidney function.

Quick summary

["Kidney health depends on this test to monitor how well your kidneys filter waste."]

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

Key facts at a glance

LOINC
100716-0
Short code
PSA DBS-mCnc
Synonyms
PSA DBS-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
4
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84153
SNOMED
39392002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
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 signal dehydration or other conditions.

What to Expect During the Test

A blood sample is taken from a vein, usually in your arm. You may feel a slight pinch, but it’s quick. No special preparation is needed unless your doctor instructs otherwise.

Common Causes of Abnormal Results

Elevated creatinine levels may be linked to kidney disease, dehydration, or conditions like heart failure. Low levels might indicate dehydration, low muscle mass, or overhydration.

When You Might Need This Test

Your doctor may order this test to check kidney function before surgeries, diagnose kidney issues, or monitor chronic conditions like diabetes or high blood pressure.

Reference range

Normal: <4.0 ng/mLN/A

Specimen: serum

No special preparation required. For PSA, avoid sexual activity for 24-48 hours before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

None

Frequently asked questions

How often will I need this test?
Your doctor will determine how often you need this test based on your health status. For example, people with kidney disease may need it more frequently than others.
Can I eat or drink before this test?
No special diet or fasting is required for this test. However, always follow your doctor’s instructions if they specify any restrictions.
What if my results are out of the normal range?
If your results are abnormal, your doctor will discuss them with you. They may recommend further tests or changes to your treatment plan to address the issue.
  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