Monday, September 29, 2014 CMS Says Keep Using 59 Modifier for Now Until you receive further notice, keep on using the 59 modifier in reimbursement claims to indicate that a health care common procedural code (HCPCS) represents a service that is separate and distinct from another service to which it is paired under the Correct Coding Initiative (CCI) program—that's the bottom line from the Centers for Medicare and Medicaid Services (CMS), which recently responded to an inquiry from APTA as to when—and whether—physical therapists should use a set of new modifiers announced by CMS in August. The clarification was forwarded to APTA by CMS after some physical therapists questioned whether they should begin using the new modifiers. The CMS answer: not yet. In August, CMS issued a transmittal describing new modifiers—XE, XS, XP, and XU—intended to be used to define subsets of the 59 modifier. The new modifier codes have not been implemented, and CMS has advised that PTs should not use the modifiers until they receive further notice.