Lost some weight & have some hanging abdominal skin. doc said can do push-ups & don't need surgery cause not that much & not a lot of weight loss.true?

Variable: There are no absolute answers to your question, and there are far too many variable to comment. Would need to be seen in person. Consider a second opinion or discuss further with your doctor.

Depends: The surgical procedures to remove/tighten skin after weight loss is generally cosmetic. This means your medical insurance benefits don't often provide coverage. Your doc may have been kindly reassuring you that you can avoid a large out of pocket fee. However, okay to get in with local plastic surgeon for all the details and risk/benefit analysis of your case.