Kidney Panel: What It Measures and How to Read Results

A kidney panel is a group of blood tests that show how well the kidneys filter waste from the blood. It typically includes creatinine, eGFR, BUN or urea, and uric acid. Clinicians order it to screen for kidney disease, monitor chronic conditions, and check kidney health during treatment.

A kidney panel usually measures several markers together:

• Creatinine (Cr): a waste product from muscle breakdown that the kidneys filter out of the blood.
• eGFR (glomerular filtration rate): a calculated estimate of how well the kidneys filter blood, often considered the best overall marker of kidney function.
• BUN (blood urea nitrogen): measures nitrogen from urea, a waste product made when the body breaks down protein.
• Urea (blood urea): closely related to BUN and reported by some labs instead of, or alongside, BUN.
• Uric acid (urate): a waste product from the breakdown of purines, substances found in many foods and body cells.

Clinicians may order a kidney panel as part of a routine checkup, especially for people with high blood pressure or diabetes, since both conditions can affect kidney health over time. It may also be ordered when someone has symptoms such as swelling, changes in urination, fatigue, or nausea that could be linked to reduced kidney function. People already followed for chronic kidney disease often have this panel repeated regularly to track how their kidneys are working over time. Some medicines can affect the kidneys, so clinicians may check kidney function before starting or continuing certain treatments, and during long-term monitoring of overall health.

Adult reference ranges vary by laboratory, so it helps to check the ranges printed on your own report as well as the table below. As a general guide, creatinine often falls between about 0.7 and 1.3 mg/dL in men and 0.6 and 1.1 mg/dL in women, though this depends on muscle mass and hydration. An eGFR of 90 or above is generally considered normal, while a result in the 60 to 89 range may be labeled mildly decreased, and a level under 60 that lasts more than three months can suggest chronic kidney disease. BUN commonly ranges from about 6 to 24 mg/dL, and urea from about 15 to 45 mg/dL, since these two markers reflect related but not identical measurements. Uric acid typically falls between about 4 and 8 mg/dL in men and 2.5 and 7 mg/dL in women. Rather than looking at one number alone, clinicians often review the pattern across all markers in the table, along with the reported units, to build a fuller picture of kidney health.

Kidney markers often move together, and looking at more than one at a time can add useful context. For example, a rising creatinine alongside a falling eGFR may point toward reduced kidney filtration, since these two markers are mathematically related. When both BUN and urea rise together with creatinine, this pattern can be linked to reduced kidney function, but it may also reflect dehydration, a high-protein diet, or gastrointestinal bleeding, since urea production depends on protein breakdown as well as kidney clearance. A BUN that rises much more than creatinine is sometimes described as a high BUN-to-creatinine ratio, which may be linked to dehydration or reduced blood flow to the kidneys rather than kidney damage itself. Elevated uric acid alongside a reduced eGFR may be linked to reduced clearance of uric acid by the kidneys. None of these patterns confirm a specific condition on their own, and a healthcare provider can help interpret them together with symptoms, history, and other tests.

Some clinicians ask for fasting before a kidney panel, particularly if other tests like a lipid panel are ordered at the same time, while others do not require fasting at all; it helps to check with the clinic that requested the test. Staying well hydrated before the blood draw is generally recommended, since dehydration can temporarily raise creatinine and BUN results. It is also helpful to tell the healthcare provider about any medicines, supplements, or recent heavy exercise, since these can affect kidney-related results, including uric acid levels.

Any result outside the expected range on a kidney panel is worth discussing with a healthcare provider, who can consider it alongside symptoms, medical history, and other lab work. Seek urgent care if you experience symptoms such as little or no urination, severe swelling, confusion, or shortness of breath, since these can be linked to serious kidney or fluid problems. Uploading a kidney panel report to MediWing can help translate the results into plain language and show how markers such as eGFR and creatinine change over time, which can support conversations with a clinician.