Kidney biopsy (1447)

Key points below

What is a kidney biopsy?

A kidney biopsy is a test to find out more about the kidneys. A very small piece of kidney tissue is taken from one kidney. This tissue is looked at under a microscope to see if there is a disease damaging the kidney.

How do I prepare my child? 

How is it done?

What happens after the test?

When will I know the results?

Waiting for the biopsy results can be hard. It may take 1 to 2 weeks for all of the results to be ready. If you have not been called with the results after 2 weeks, call your child’s doctor’s office.



Call your child’s doctor, nurse, or clinic if you have any questions or concerns or if your child has:

  • Bright red blood in the urine.
  • A fever higher than 100º F (37.8º C).
  • More pain at the site of the biopsy. 
  • Pain in the stomach.
  • Bleeding at the site of the biopsy.
  • Special health care needs that were not covered by this information.