F9HCPCS Level II
Right hand, fifth digit
- Usage notes
- Append to procedure codes performed on the right hand, fifth digit (little finger).
- Common mistakes
- Using F9 when the correct digit was actually the fourth (F8) — verify against the documented digit count, not just 'pinky vs. ring finger' terminology.
Related modifiers
Frequently asked questions
What does modifier F9 mean?
Right hand, fifth digit
When do I use modifier F9?
Append to procedure codes performed on the right hand, fifth digit (little finger).
What's a common mistake with modifier F9?
Using F9 when the correct digit was actually the fourth (F8) — verify against the documented digit count, not just 'pinky vs. ring finger' terminology.
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.