BUN/Creatinine Ratio Test in California

The BUN/Creatinine Ratio Test compares two waste products in your blood to help assess kidney function and fluid balance. It is often ordered when kidney problems or dehydration are suspected.

What it measures

BUN (Blood Urea Nitrogen) — A waste product from protein breakdown that kidneys remove.
Creatinine — A waste product from muscle activity that kidneys filter out.
BUN/Creatinine Ratio — A calculated number comparing BUN to creatinine levels.

Who it is for

A clinician may order this test if you have symptoms of kidney issues, dehydration, or as part of a routine metabolic panel.

Preparation

No special preparation is usually needed. Fasting is not required unless other tests are ordered at the same time.

Results and what they mean

Results are reported as numbers for BUN, creatinine, and their ratio. Your clinician interprets these in the context of your health. This is general information, not medical advice.

Requesting the BUN/Creatinine Ratio Test in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. With coastal metros, inland towns, and rural counties with very different access to testing, it pays to schedule your collection in advance.

Frequently asked questions

What does a high BUN/Creatinine ratio mean?

It can suggest dehydration or other conditions, but only a clinician can interpret your specific results.

Do I need to fast for this test?

No, fasting is not typically required for the BUN/Creatinine Ratio Test alone.

How long until I get results?

Results are usually available within 1-3 business days.

Can I eat or drink before the test?

Yes, normal eating and drinking are fine unless your clinician gives other instructions.

BUN/Creatinine Ratio Test by city in California

All testing in California → Full BUN/Creatinine Ratio Test guide →