In my opinion, these results do not automatically mean you cannot have a breast augmentation, but they do need to be reviewed by your surgeon and anesthesia team before any elective surgery. A mildly high red blood cell count and hematocrit can sometimes be related to dehydration, smoking/vaping, living at altitude, sleep apnea, or other medical factors. A low MCHC can sometimes point toward an iron-related issue, but it has to be interpreted with the rest of the blood count and your medical history. I would not make the decision based on one screenshot alone. Your surgical team may repeat the CBC, check whether you were well hydrated, and ask about clotting history, lung/heart issues, medications, and smoking. If the hematocrit remains elevated or there is any concern, medical clearance from your primary doctor or a hematologist may be needed before proceeding. For a cosmetic breast augmentation, it is better to delay briefly and clarify the labs than to move forward with unresolved questions.