V4 HCPCS Level II modifier: Demonstration modifier 4
V4 is a HCPCS Level II modifier: “Demonstration modifier 4.” It adds this detail to the code it is reported with.
Official description
V4Demonstration modifier 4
HCPCS · United States
Medicare details
The indicators CMS publishes with V4 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Oct 1, 2020
Where V4 sits
- 1GroupHCPCS modifiers
- 2Modifier V4Demonstration modifier 4
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.
Frequently asked questions
What does HCPCS code V4 mean?
V4 is the HCPCS code for “Demonstration modifier 4” in CMS’s HCPCS Level II October 2026 release.
Where is V4 in the HCPCS Level II list?
V4 is listed under Modifiers.
Does Medicare cover V4?
CMS lists V4’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.
Codes beside V4
All modifiersUQFour patients servedURFive patients servedUSSix or more patients servedV1Demonstration modifier 1V2Demonstration modifier 2V3Demonstration modifier 3V5Vascular catheter (alone or with any other vascular access)V6Arteriovenous graft (or other vascular access not including a vascular catheter)V7Arteriovenous fistula only (in use with two needles)V8Infection presentV9No infection presentVMMedicare diabetes prevention program (mdpp) virtual make-up session