X4 HCPCS Level II modifier: Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and…

X4 is a HCPCS Level II modifier: “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….” It adds this detail to the code it is reported with.

Official description

X4

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

Short description: Episodic/focused services

HCPCS · United States

Medicare details

The indicators CMS publishes with X4 in its October 2026 file. They describe Medicare’s handling, not another payer’s.

Medicare coverage: Carrier judgment
Added: Jan 1, 2018

Where X4 sits

1GroupHCPCS modifiers
2Modifier X4Episodic/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

Source and release

Data release: HCPCS Level II · October 2026
Effective date: Oct 1, 2026
Publisher: CMS

This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See X4 in the CMS source

Frequently asked questions

What does HCPCS code X4 mean?

X4 is the HCPCS code for “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” in CMS’s HCPCS Level II October 2026 release.

Where is X4 in the HCPCS Level II list?

X4 is listed under Modifiers.

Does Medicare cover X4?

CMS lists X4’s Medicare coverage as “Carrier judgment”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.

Which HCPCS Level II release does this page use?

It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

All modifiers

V9No infection present VMMedicare diabetes prevention program (mdpp) virtual make-up session VPAphakic patient X1Continuous/broad services: for reporting services by clinicians, who provide the principal care for a patient, with no planned endpoint of the relationship; services in this…X2Continuous/focused services: for reporting services by clinicians whose expertise is needed for the ongoing management of a chronic disease or a condition that needs to be…X3Episodic/broad services: for reporting services by clinicians who have broad responsibility for the comprehensive needs of the patient that is limited to a defined period and…X5Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent…XESeparate encounter, a service that is distinct because it occurred during a separate encounter XPSeparate practitioner, a service that is distinct because it was performed by a different practitioner XSSeparate structure, a service that is distinct because it was performed on a separate organ/structure XUUnusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service ZANovartis/sandoz