HCPCS Level II modifier
Modifier V3
Modifier V3 is a HCPCS Level II modifier. CMS describes it as: Demonstration modifier 3.
Source: CMS HCPCS Level II, October 2026 file dated September 23, 2026. Publisher page
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- Modifier
- V3
- Type
- HCPCS Level II modifier, maintained by CMS
- CMS description
- Demonstration modifier 3
- Claim form
- CMS-1500 item 24D, up to four modifiers per line. 837P SV101-3 to SV101-6.
- Guidance
- CMS HCPCS quarterly update
Related modifiers
- V4Demonstration modifier 4
- V2Demonstration modifier 2
- V5Vascular catheter (alone or with any other vascular access)
- V1Demonstration modifier 1
- V6Arteriovenous graft (or other vascular access not including a vascular catheter)
- USSix or more patients served
- V7Arteriovenous fistula only (in use with two needles)
- URFive patients served
Related pages
Questions
What does modifier V3 mean?
Modifier V3 is a HCPCS Level II modifier. CMS describes it as: Demonstration modifier 3.
Is modifier V3 a CPT or a HCPCS modifier?
V3 is a HCPCS Level II modifier from the CMS quarterly HCPCS file. Two-digit numeric modifiers, such as 25 or 59, are CPT modifiers.
Where does modifier V3 go on a claim?
On the CMS-1500 it goes in item 24D next to the procedure code. Each line holds up to four modifiers. On an 837P it goes in SV101-3 to SV101-6.
What denial comes back when a modifier is wrong?
A missing or mismatched modifier often comes back as CARC 4. A modifier that was not valid on the date of service comes back as CARC 182. A bundling edit the modifier should have bypassed comes back as CARC 97 or 236.