The RN completes the Oasis at the Start of Care (SOC visit). A physical therapist can also complete an OASIS but an occupational therapist cannot. For more info about the OASIS get this book: "The Handbook of Home Health Standards: Quality, Documentation and Reimbursement." by Tina Marrelli or go to CMS.gov/oasis/. It is a very important document in home care and you should be taught it in orientation.