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Serum/plasma electrolytes panel with renal function markers

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

This test measures key substances in your blood that help assess how well your kidneys are working and whether your body has the right balance of important minerals.

Quick summary

["Check kidney function and electrolyte balance in one simple blood test."]

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

Key facts at a glance

LOINC
24362-6
Short code
Renal Func 2000 Pnl SerPl
Synonyms
Renal Func 2000 Pnl SerPl
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

What This Test Measures

Your blood sample will be analyzed for several important electrolytes and kidney-related markers, including sodium, potassium, chloride, bicarbonate, creatinine, and possibly other substances like blood urea nitrogen (BUN) or specific protein/enzymes that reflect kidney health. Some tests may also include measurements of calcium, phosphorus, or magnesium depending on the specific panel requested.

Why It Matters

Electrolytes like sodium and potassium help regulate your body’s fluid balance, nerve function, and muscle contractions. Kidney function markers help determine how well your kidneys filter waste and maintain chemical balance. Abnormal levels can signal dehydration, kidney disease, heart problems, or other health concerns.

Common Reasons for This Test

Your doctor may order this test if you have symptoms like swelling, fatigue, confusion, frequent urination, or unexplained weight changes. It’s also used to monitor chronic conditions like diabetes, heart disease, or kidney disorders, or before certain treatments that affect electrolytes or kidney function.

What to Expect Before the Test

No special preparation is needed, but avoid heavy meals or alcohol 24 hours before. Drink plenty of water unless instructed otherwise. If you’re on certain medications (like diuretics), let your doctor know—this may affect your results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Renal Function & Electrolyte Panel

Frequently asked questions

How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on your lab’s processing time. Follow-up with your doctor to discuss any abnormal findings.
Can I eat or drink before the test?
You can eat a normal meal, but avoid heavy or fatty foods 2 hours before the test. Water is usually fine unless your doctor advises otherwise.
What if my results are out of range?
If results are abnormal, your doctor will explain what it means and may recommend further testing or adjustments to your treatment plan.
  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