Hospitals will still be required to contact the PRO for authorization prior to admission. Concurrent review for services reimbursed under the DRG will no longer be required. Critical access, rehab, ventilator facilities and all psychiatric services still will be subject to concurrent review criteria. The PRO also will be conducting retroactive review of admissions including analysis of coding patterns, changes in case mix, re-admissions, outliers, quality of care, etc. The review will require hospitals to provide copies of medical records upon request and may include onsite review.