PT Coding

We are an outpatient PT practice located in IL, we recently upgraded to a new EMR software company and are needing some clarification on timed units.

Can someone please tell me what rule-set we should be following for WC patient's and also provide the documentation to support this as I have looked all over the IWCC website and see no reference to any specific rule set.

Also, in the case when we have a private insurer like BCBS as a primary payer and Medicare as a secondary payer, which rule set takes precedence? If you could also provide CMS documentation regarding this that would be great as well.

Thanks in advance for your help!

PT Coding