Describe the reimbursement mechanisms (Medicare, Medicaid, private insurers, and HMOs) for APRNs and compare and contrast with those for physicians

Describe the reimbursement mechanisms (Medicare, Medicaid, private insurers, and HMOs) for APRNs and compare and contrast with those for physicians. Are there any differences in the fee schedules? Please describe. Can APRNs own their own practices in your state? Why or why not?