Your doctor needs to:

Fill out and sign the Report of Industrial Accident (ROA) or Physician's Initial Report with the injured worker. This can also be done by a Registered Nurse Practitioner (ARNP) or a physician's assistant. Nurses and medical office staff are not permitted to do this paperwork.
Send bills directly to L&I or the self-insured employer, not you.
Let you and your employer know if there are any work restrictions or release-for-work dates.