CPT Modifier 99
Published 07/09/2024
Description
Multiple Modifiers (same procedure code/detail line)
Guidelines and Instructions
When additional Modifier field/block space is needed than what is available for a submission (if more than four) replace all modifiers’ entries on the line with only “99.”
- Reflect all modifiers involved in the appropriate/other field of the electronic or paper claim form
- Modifier 99 applies as a replacement to any applicable modifier combination, including those identified as informational or pricing as well as those which may impact payment
References
- Medicare Claims Processing Manual, CMS IOM Publication 100-04 — Chapter 26 (Items 19 as well as 24D) (PDF)
- Interactive CMS-1500