Can anyone provide insight on when to bill Rotator cuff surgery, open; acute CPT 23410 versus Rotator cuff surgery, open; chronic CPT 23412? Our practice deals with a lot of workers compensation injury patients. Information I have reviewed so far, states- injury is considered acute, regardless of how long-ago injury happened. I am confused on the CPT code assignment of acute versus chronic. Couldn't find any CPT Assistant reference that stated when you would use one over the other. I would be eternally grateful for any suggestions. I have an OP report where physician doesn't state acute or chronic and the coder wants to assign the CPT code for Acute.