@mikemp Those of us with conditions that require regular blood work for monitoring will sometimes see fluctuations. We want to look at the trends, not necessarily a one time result. As is normal, there can be a fleeting reason for a change. Were you feeling unwell for some reason? Dehydrated? Was there a change in your medications, like a new formula/manufacturer? These can sometimes be a factor.

For me, I get two draws a month, one for my multiple myeloma, and another for my kidney issues. The oncology is always done at the cancer center. The kidney values are drawn either at the dialysis center, or at Quest Diagnostics. So, there can be variation in values based on the lab who processes the sample. Another factor to consider.
Ginger