Information checked 24 October 2026. General information, not individual medical advice.
Do I need a urine ACR test as well as an eGFR blood test?
Sometimes. The tests answer different questions. eGFR estimates how well your kidneys filter, using a blood result. A urine albumin:creatinine ratio, or ACR, looks for albumin in urine. NICE recommends using both when testing adults at risk of chronic kidney disease. A normal eGFR does not make an indicated urine test unnecessary. [1]
What the urine test adds
Albumin is a protein. The ratio relates the albumin concentration to creatinine in the same urine sample. NICE prefers ACR to a protein:creatinine ratio for the initial detection of low levels of protein in urine. This is not the same as a dipstick used to investigate a possible urine infection. Ask which test has actually been ordered rather than assuming every urine sample covers every question. [1]
Who should discuss testing?
NICE lists diabetes, hypertension, a previous acute kidney injury, cardiovascular disease and certain structural or inherited kidney risks among the reasons to offer adults eGFR and ACR testing. This is risk-led testing, not an instruction for every healthy person to buy a larger panel. Tell the clinician about your conditions, medicines and family history so the request fits you. [1]
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What an abnormal ACR means
An abnormal result needs interpretation and sometimes confirmation. NICE recommends confirming an ACR between 3 and 70 mg/mmol in a subsequent early-morning sample. Its guidance says a repeat to confirm is not needed when the initial result is 70 mg/mmol or more. That is a clinician-facing distinction, not permission to ignore a high result. A confirmed ACR of 3 mg/mmol or more is clinically important proteinuria. [1]
Do not diagnose yourself from one flag
The blood result, urine result, previous measurements and clinical circumstances belong together. NICE classifies chronic kidney disease using both GFR and ACR categories because the combination helps describe risk. One unfamiliar number on a commercial report is not a complete diagnosis. Ask what needs checking now, what should be repeated and whether referral is appropriate. [1]
Prepare for a useful review
Bring the complete blood and urine reports, their dates and units, a medicine and supplement list, and previous kidney results. Ask whether a urine sample needs particular collection instructions. If a laboratory or doctor has asked for urgent assessment, follow that advice rather than waiting for a routine appointment or another online panel.
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Arrange the right assessment, not the longest panel
Contact The Online GP by The Wellness to discuss existing kidney results or a risk-led testing enquiry. Ask for the proposed tests, collection arrangements, total fee and results-review plan before paying. Do not assume that a general blood panel includes urine ACR. A good plan states what is being investigated and who will explain the findings.
Common questions
Can eGFR be normal while ACR is raised? The two measurements describe different aspects of kidney health; clinicians use both in appropriate patients. Does a urine infection dipstick replace ACR? No. Is a repeat always needed? No: the result and clinical situation determine the next step. Should I stop medicines before testing? Only if your treating clinician tells you to.
Sources
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