Critical care services shall not be paid on the same calendar date the physician also reports a procedure code with a global surgical period unless the critical care is billed with CPT modifier -25 to indicate that the critical care is a significant, separately identifiable evaluation and management service that is above and beyond the usual pre and post operative care associated with the procedure that is performed.
Services such as endotracheal intubation (CPT code 31500) and the insertion and placement of a flow directed catheter e.g., Swan-Ganz (CPT code 93503) are not bundled into the critical care codes. Therefore, separate payment may be made for critical care in addition to these services if the critical care was a significant, separately identifiable service and it was reported with modifier -25. The time spent performing the pre, intra, and post procedure work of these unbundled services, e.g., endotracheal intubation, shall be excluded from the determination of the time spent providing critical care.
This policy applies to any procedure with a 0, 10 or 90 day global period including cardiopulmonary resuscitation (CPT code 92950). CPR has a global period of 0 days and is not bundled into critical care codes. Therefore, critical care may be billed in addition to CPR if critical care was a significant, separately identifiable service and it was reported with modifier -25. The time spent performing CPR shall be excluded from the determination of the time spent providing critical care. In this instance it must be the physician who performs the resuscitation who bills for this service. Members of a code team must not each bill Medicare Part B for this service.
When postoperative critical care services (for procedures with a global surgical period) are provided by a physician other than the surgeon, no modifier is required unless all surgical postoperative care has been officially transferred from the surgeon to the physician performing the critical care services. In this situation, CPT modifiers “-54” (surgical care only) and “-55″(postoperative management only) must be used by the surgeon and intensivist who are submitting claims. Medical record documentation by the surgeon and the physician who assumes a transfer (e.g., intensivist) is required to support claims for services when CPT modifiers -54 and -55 are used indicating the transfer of care from the surgeon to the intensivist. Critical care services must meet all the conditions previously described in this manual section.
http://www.cms1500claimbilling.com/2016/06/critical-care-during-global-surgery-cpt.html