The answer is “yes.” When a Healthcare Directive or Power of Attorney is made, you are free to provide a scope of authority as broad or as narrow as you wish. For instance, in a healthcare directive, you might grant a person the power to make healthcare decisions on your behalf, but explicitly prevent them from authorizing blood transfusions (such as if a transfusion would be against your religious beliefs). Similarly, you may grant authority for a person to manage your financial affairs, but state that they do not have the authority to sell real property.
I can work with you to review the various situations that should be considered so that you can make decisions regarding your care.