X4 is a valid 2023 HCPCS Modifier that could be used to indicate Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period.

X4 Modifier has been in effect since Jan 01, 2018.

Short description for X4 HCPCS Modifier code:

Episodic/focused services