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Serum creatinine with kidney transplant evaluation (or pre-transplant assessment)

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

This test measures how well your kidneys are filtering waste from your blood. It’s part of routine checks for patients awaiting kidney transplant to assess kidney function before a transplant.

Quick summary

Your creatinine levels help doctors determine if your kidneys are working as expected before a transplant.

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

Key facts at a glance

LOINC
64385-8
Short code
KIDNEYTRANSPLANTCENTERDIALYSISPATIENTSWHOAREAWAITINGAKIDNEYTRANSPLANT
Synonyms
—
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 for Kidney Transplant Candidates

Creatinine is a waste product that your kidneys normally remove from your blood. High levels can indicate poor kidney function, which may affect your eligibility for transplant or how well your new kidney will function. This test helps doctors monitor your current kidney health and plan for transplant readiness.

What to Expect Before Your Test

You’ll likely have a simple blood draw, usually taken from your arm. No special preparation is needed, but fasting may be required for some related tests. Your doctor will provide specific instructions if this applies to you.

How Your Results Are Used

Your creatinine result helps doctors calculate your estimated glomerular filtration rate (eGFR), a measure of kidney function. This number is critical for determining if your kidneys are healthy enough for transplant and for tailoring your pre-transplant care.

What to Do If Your Results Are Abnormal

If your creatinine level is higher than expected, it may mean your kidneys aren’t filtering waste properly. Your doctor will discuss this with you and may recommend additional tests or adjustments to your care plan.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Monitoring Kidney Function Before Transplant

Short name

Creatinine Level

Frequently asked questions

Will my creatinine test affect my transplant eligibility?
Your creatinine level is one factor doctors consider, but they also review other health metrics. If your kidneys are too damaged, you may need additional time to prepare or may not qualify for transplant. Your transplant team will explain the full evaluation process.
What if my creatinine level is higher than usual?
Higher creatinine levels often mean your kidneys aren’t working as well as they should. Your doctor may recommend treatments to improve kidney function, such as adjusting medications, diet, or hydration. They’ll also monitor your progress closely.
How often will I need this test?
This test may be done once as part of your initial evaluation, but your transplant team may order it again later to track kidney health before or after transplant. Follow your doctor’s schedule for follow-up tests.
  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