Comprehensive Renal Function Panel
A comprehensive blood test that evaluates how well your kidneys are functioning by measuring waste products, electrolytes, and other markers in your blood.
["Measures kidney function through BUN, creatinine, and eGFR levels","Checks electrolyte balance (sodium, potassium, chloride, bicarbonate)","Evaluates calcium, phosphorus, and albumin for metabolic health","Helps detect kidney disease, dehydration, or electrolyte imbalances","Often ordered during routine check-ups or when kidney problems are suspected"]
Key facts at a glance
- Category
- chemistry
- Sample
- serum
- Container
- red-top or SST
- Fasting
- false
What is this panel?
The Comprehensive Renal Function Panel is a group of blood tests that assess how well your kidneys are working. Your kidneys are vital organs that filter waste products from your blood, maintain fluid balance, and keep your electrolytes at healthy levels. This panel provides a complete picture of your kidney function and overall metabolic health.
What tests are included?
- BUN (Blood Urea Nitrogen) - measures waste products filtered by kidneys
- Creatinine - indicates how well kidneys are filtering blood
- eGFR (estimated Glomerular Filtration Rate) - calculates kidney filtering efficiency
- Sodium - essential electrolyte for fluid balance
- Potassium - critical for heart and muscle function
- Chloride - helps maintain acid-base and fluid balance
- Bicarbonate - measures body's acid-base balance
- Albumin - protein that shows kidney health and nutrition status
- Calcium - important for bone health and nerve function
- Phosphorus - works with calcium for bone strength
When is this panel needed?
Your doctor may order this comprehensive renal panel if you have symptoms of kidney problems such as swelling in your legs or face, changes in urination, fatigue, or unexplained high blood pressure. It is also recommended for people with diabetes, high blood pressure, or a family history of kidney disease. Regular monitoring is important for those taking medications that may affect kidney function, such as certain blood pressure or pain medications.
What do the results mean?
Abnormal results may indicate kidney disease, dehydration, urinary tract obstruction, or other health conditions. High BUN and creatinine levels may suggest reduced kidney function, while abnormal electrolyte levels can indicate imbalances that affect heart rhythm, muscle function, and overall health. Your healthcare provider will interpret your results based on your overall health, medications, and other factors.
Frequently asked questions
Do I need to fast before this test?
How often should I have this test?
Can medications affect my results?
What happens if my results are abnormal?
Sources
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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 1, 2026. · Read our editorial policy