Blood Draws from an access catheter

What is the correct cpt code for blood draws from an access catheter?

medicare

CPT 36591 and 36592 are listed by the Centers for Medicare & Medicaid Services (CMS) in the 2009 Medicare Physician Fee Schedule Database as "T" status. By CMS national requirements, "T" status codes are "only paid when there are no other services payable under the physician fee schedule billed on the same date by the same provider. If any other services payable under the physician fee schedule are billed on the same date by the same provider, these services are bundled into the service(s) for which payment is made."