Blood Urea Nitrogen (BUN) helps assess how well the kidneys filter waste and maintain fluid and electrolyte balance.
Also known as: BUN, Urea Nitrogen
Sample
Blood
Fasting
Not required
Report in
24 hours
Collection
Free at home
Blood Urea Nitrogen (BUN) measures the amount of urea - a waste product formed when the liver breaks down protein - circulating in your blood. Since the kidneys are responsible for clearing urea, BUN is one of the standard markers used to assess kidney function, usually alongside creatinine.
Ordered as part of kidney function screening, to investigate symptoms of kidney trouble (swelling, reduced urine output, fatigue), and to monitor known kidney disease or the effect of certain medicines on the kidneys.
It can help your doctor assess
Reduced kidney function, dehydration, and (less commonly) liver or protein-metabolism disorders.
This test may be considered for:
Whether this test is right for you depends on your symptoms, medical history and the reason for testing - your doctor can advise.
The concentration of urea nitrogen in the blood, reflecting how well the kidneys are filtering waste and, to some extent, your protein intake and hydration status.
BUN
Kidney Function
Rises when the kidneys filter less efficiently, or with dehydration and high protein intake; usually interpreted alongside creatinine.
How to read your result
Your report should be read using the reference interval, unit and method shown by the performing laboratory. A result outside a reference interval does not automatically establish a diagnosis, and a result inside the interval does not rule out every health problem. Clinical interpretation depends on symptoms, history and other findings.
| Marker | Result | What it may be associated with |
|---|---|---|
| BUN | High | May indicate reduced kidney function, dehydration, or high protein intake; a raised BUN with normal creatinine often points to dehydration rather than true kidney disease. |
If a result is outside the range
If the Blood Urea Nitrogen (BUN) is reported as high, low, positive, negative or otherwise outside the laboratory's stated interval, the meaning depends on the specific test and the reason it was ordered. Your clinician may consider repeat testing, related investigations or other clinical information before deciding what the result means.
Limitations of this test
BUN alone doesn’t distinguish between dehydration and true kidney impairment - it’s combined with creatinine and eGFR for a clearer picture.
An abnormal result does not by itself mean you have a particular disease. Your doctor interprets results together with your symptoms, history and other tests.
| Parameter | Reference range | Unit |
|---|---|---|
| BUN | 7 - 20 | mg/dL |
Typical adult ranges for guidance. Reference intervals vary with the laboratory method, age and sex - always read your result against the range printed on your own report.
Book
Choose the test and a time slot online, or call us and we'll book it for you.
Prepare
Follow the preparation steps above for this test.
Sample collection
A trained phlebotomist collects the sample at your home - no extra charge.
Laboratory processing
Your sample is processed in our laboratory and reviewed by a pathologist.
Report
Your report is shared on WhatsApp and email, usually within 24 hours.
For a blood-based test, a small blood sample is collected by a trained healthcare professional, usually from a vein in the arm. The collection normally takes only a few minutes; mild temporary discomfort or bruising can occur at the puncture site.
High-protein diets, dehydration, gastrointestinal bleeding, and certain medicines can raise BUN independent of true kidney function.
Laboratory results are interpreted together with your symptoms, medical history and other investigations. If your results are significantly abnormal, or you have symptoms that worry you, discuss them with a qualified doctor promptly.
Trusted public health sources for the information on this page:
This information is for general awareness and does not replace advice from your doctor.
The BUN test cost in Mumbai at HWP Diagnostic is ₹199 - 20% less than the MRP of ₹249. There are no extra charges for home sample collection. The same price applies across Malad, Kandivali, Borivali and Goregaon.
| Test | Blood Urea Nitrogen (BUN) |
|---|---|
| Price at HWP Diagnostic | ₹199 |
| MRP | ₹249 (you save ₹50 - 20% off) |
| Home collection charge | Free |
| Report time | 24 hours |
| Fasting | Not required |
| Available in | Malad, Kandivali, Borivali & Goregaon (same price) |
Book the BUN test with free home sample collection anywhere in Malad, Kandivali, Borivali and Goregaon, or walk in to our lab in Malad West, Mumbai - open 24×7.
Home collection areas include
Malad WestMalwani & KharodiMalad EastKandivali WestKandivali EastBorivali WestGorai & Borivali WestIC Colony & MandapeshwarBorivali EastGoregaon WestBangur Nagar & Motilal NagarGoregaon EastAarey ColonyDahisarJogeshwari WestJogeshwari East
Directions on Google MapsThe full form of BUN is Blood Urea Nitrogen. It is also known as BUN, Urea Nitrogen.
Home collection at the same price (₹199) across these areas, with our lab in Malad West open 24×7.
Get this test along with other important checks - usually for less than booking them separately.
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No fasting is required, though it may be ordered alongside fasting tests as part of a broader panel.
It can suggest reduced kidney function, but is also commonly raised by dehydration or a high-protein diet - your doctor will check it alongside creatinine to clarify the cause.
Together they give a fuller picture: creatinine is a more specific kidney marker, while the BUN-to-creatinine ratio helps distinguish dehydration from true kidney impairment.
Yes, a high-protein diet can raise BUN even with normal kidney function, so your doctor considers your diet when interpreting results.
Blood Urea Nitrogen (BUN) is a blood test. Blood Urea Nitrogen (BUN) helps assess how well the kidneys filter waste and maintain fluid and electrolyte balance.
The Blood Urea Nitrogen (BUN) may be ordered when a healthcare professional needs information about the condition or health area assessed by this test. Blood Urea Nitrogen (BUN) helps assess how well the kidneys filter waste and maintain fluid and electrolyte balance. At HWP Diagnostic the sample can be collected free at your home in Malad and nearby Mumbai areas, and the report is usually shared within the same day or next day. Please carry or upload your doctor's prescription where the test needs one, and discuss the result with your doctor for a full interpretation.
Blood Urea Nitrogen (BUN) helps assess how well the kidneys filter waste and maintain fluid and electrolyte balance.
The test may be relevant for people whose symptoms, medical history, screening needs or treatment monitoring match the purpose of the Blood Urea Nitrogen (BUN).
No special preparation is needed for this test.
No, fasting is not required for the Blood Urea Nitrogen (BUN). You can eat and drink normally unless your doctor has advised otherwise.
The Blood Urea Nitrogen (BUN) is done on a blood sample.
For a blood-based test, a small blood sample is collected by a trained healthcare professional, usually from a vein in the arm. The collection normally takes only a few minutes; mild temporary discomfort or bruising can occur at the puncture site.
Reports for the Blood Urea Nitrogen (BUN) are usually ready within 24 hours of sample collection. You receive them on WhatsApp and email.
The Blood Urea Nitrogen (BUN) costs Rs 120 at HWP Diagnostic (MRP Rs 165). Home sample collection is free.
Your report should be read using the reference interval, unit and method shown by the performing laboratory. A result outside a reference interval does not automatically establish a diagnosis, and a result inside the interval does not rule out every health problem. Clinical interpretation depends on symptoms, history and other findings.
If the Blood Urea Nitrogen (BUN) is reported as high, low, positive, negative or otherwise outside the laboratory's stated interval, the meaning depends on the specific test and the reason it was ordered. Your clinician may consider repeat testing, related investigations or other clinical information before deciding what the result means.
The Blood Urea Nitrogen (BUN) can provide important information, but laboratory results are generally interpreted together with symptoms, medical history, examination and other investigations. A single result should not be treated as a diagnosis without clinical context.
Some medicines, supplements, food, exercise and other pre-test factors can affect particular laboratory results. Tell the healthcare professional about medicines and supplements you take, and do not stop prescribed medicines unless your clinician tells you to.
Yes. Free home sample collection for the Blood Urea Nitrogen (BUN) is available across Malad, Kandivali, Borivali and Goregaon in Mumbai. You can also visit our Malad West lab, open 24x7.
