CBC
Hb >17.5 (males) or >15.5 (females)
Evaluate for underlying disease
Hb >17.5 (males) or >15.5 (females)
Polycythemia
Primary polycythemia 
Thrombocytosis
Polycythemia vera
Dyshemoglobinemia
Essential thrombocytosis 
Lactic acidosis
Chronic myelogenous leukemia 