Hello @sheeb,

I can only imagine how worried you must be! We are so glad you've joined Mayo Clinic Connect – Welcome!

I’d like to start by introducing you to Mentors @rosemarya @predictable, and fellow members @fauneconner @lcamino @jjwest @ryman @lindaw @riveroaksfarm @deanna21239 @pkindron, who know quite a bit about bladder and kidney issues from their own experiences.

You may also be interested in reading or taking part in these past discussions:
– Stage 3 CKD https://connect.mayoclinic.org/discussion/stage-3-ckd/
– Possible low kidney function https://connect.mayoclinic.org/discussion/possible-low-kidney-function/
– Diminished kidney function http://mayocl.in/2l9m1P9

For your convenience, I've also copied this information from Mayo Clinic , specifically about GFR:
There are five stages of kidney disease. The glomerular filtration rate (GFR) measures how much blood the kidneys filter each minute, recorded as milliliters per minute (mL/min). As the GFR declines, so does your kidney function.
End-stage renal disease usually occurs when kidney function is less than 10 percent of normal. As a part of kidney disease staging, your doctor also may test whether protein is present in your urine.

Stage 1 GFR 90 or above = Normal or near-normal kidney function
Stage 2 GFR 60 to 89 = Mild loss of kidney function
Stage 3a GFR 45 to 59 = Mild to moderate loss of kidney function
Stage 3b GFR 30 to 44 = Moderate to severe loss of kidney function
Stage 4 GFR 15 to 29 = Severe loss of kidney function
Stage 5 GFR Less than 15 = Kidney failure
https://www.mayoclinic.org/diseases-conditions/end-stage-renal-disease/diagnosis-treatment/drc-20354538
If you wish to get a second opinion from Mayo Clinic, please call one of our appointment offices. You can also request an appointment online.
The contact information for Minnesota, Arizona and Florida can be found here: http://www.mayoclinic.org/appointments

We look forward to getting to know you, @sheeb. What symptoms did you have? Do you have to make significant changes to your diet?