How many cc’s of fat can be safely removed from an abdomen of someone weighing 270 lbs and a height of 5’10? (photos)

In an outpatient setting, the limit is 5 liters (4 liters in some states). This will amount to 11 lbs. However, this is not purely fat but a combination fat and a number of other components (blood, tumescent etc.).
Ultimately, lipo is a contouring tool and not a means to weight loss. It is best reserved for addressing those areas which have been resistant to diet and exercise.With regards to your specific question, 1800 cc would be possible. However, whether this is appropriate is another issue. You would be better served by pre-op weight loss (current BMI of 38.7 represents an elevated surgical risk). Optimal candidates have reached a healthy stable weight at which they are content (preferably with a BMI < 30). I would venture to guess that once you reach that point you may consider other options including tummy tuck.
As always, discuss your concerns with a board certified plastic surgeon (ABPS).
Donovan Rosas MD
Board Certified by the American Board of Plastic Surgery
Member: American Society for Aesthetic Plastic Surgery, American Society of Plastic Surgeons
RealSelf Top 100
RealSelf Hall of Fame

Dear Bab27,
Generally speaking, you want to reach your goal weight before you consider a liposuction, otherwise your results will be suboptimal if you continue to lose weight after the surgery. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery