Serum sodium of 143mmol/l(134-144 lab range) & serum calcium of 10.2 mg/dl (lab range 8.7-10.2. both @ higher end of range...concerning??

No: As long as you have regular follow-up with your doctor, your lab tests will be checked at every visit. I would not worry about the high normal lab values at this time.

No,: calcium depends on Albumin and pH, sodium varies each time you test depending on fluid intake, and they're normal

No: Both are actually normal. Borderline would be 145 or 10.3.