Chloride level was 101 in may but now is 93. why the dip?

Serum chloride: Serum chloride concentrations change for only a few reasons - 1. Can dip if serum sodium dips also: will follow sodium. 2. Can dip if serum bicarbonate (sodium bicarbonate) rises: reciprocal change. 3. Chloride thus is a secondary anion -- it follows another ionic change as above. Discerning the primary cause is essential: sodium depletion, water retention (1.). Bicarbonate (sodium bicarbonate) retention, chloride loss (2.) Doc knows