As anyone who bills for work comp in California knows, we have been using a modified set of CPT codes from 1999 for our billing since, well, 1999. This little gem is known as the "Official Medical Fee Schedule", or OMFS. Starting the middle of next week, we will be using a modified set of current CPT codes.
Some of the changes from current CPT are a set of special codes for reports starting with "WC", such as WC001. These codes are in the linked document.
Consultation codes will no longer be used; regular E&M plus extended visit codes (as necessary) will be used.
Only one new patient visit per injury will be allowed, regardless of how long it has been since you have seen the patient. This means if you last treat a patient in 2007, and they come back to you in 2014, it is coded as an established patient visit, NOT a new patient visit.