You can borrow up to the total cost of attendance. For first years this year, it looks like it's $61,602. Assuming you're going the federal loans route, you'll borrow part through the regular unsubsidized loan and the remainder through the GradPLUS loan.
Information on cost of attendance is
here. Your actual costs may actually vary of course depending on your needs for housing, food, travel expenses, etc. If you don't need LECOM's health insurance because you're covered by a parent or a spouse, you can still borrow the full COA and your loan check is a bit bigger.
Budgeting-wise, remember that first and second year cost of attendance cover nine months worth of living/etc and if you aren't someone who goes home in the summer to free housing, you'll have to make that stretch a bit longer.