@aconsolmagno Welcome to Mayo Clinic Connect! Most of us will agree, looking at trends in our kidney function, rather than a specific test, is the better way to view things.

What could cause the differences from lab test to lab test? Possibilities include:
-A different lab processing the samples.
-An infection or illness you are getting over.
-Dehydration.
-Change in medications/timing of periodic medications in relation to the testing date.

And, many of us were cringing when you mentioned Google causing you anxiety! It's so easy to "go down a rabbit hole" on Google, and information you find is not always accurate, nor relatable to your situation!

Has your medical team offered any explanation for the differences in your eGFR?
Ginger