F3HCPCS Level II
Left hand, fourth digit
- Usage notes
- Append to procedure codes performed on the left hand, fourth digit (ring finger).
- Common mistakes
- Applying a digit modifier to a code that already bundles multiple digits into one payment, resulting in an unnecessary or rejected modifier.
Related modifiers
Frequently asked questions
What does modifier F3 mean?
Left hand, fourth digit
When do I use modifier F3?
Append to procedure codes performed on the left hand, fourth digit (ring finger).
What's a common mistake with modifier F3?
Applying a digit modifier to a code that already bundles multiple digits into one payment, resulting in an unnecessary or rejected modifier.
HCPCS modifier data from CMS. CPT® is a registered trademark of the American Medical Association — CPT modifier descriptions are not included on this site. Always verify codes with authoritative sources before making billing decisions.