Modifier 59 should be used to distinguish a different session or patient encounter, or a different procedure or surgery, or a different anatomical site, or a separate injury. It should also be used when an intravenous (IV) protocol calls for two separate IV sites.

Which code does the 59 modifier go on?

Modifier 59 is used to identify procedures/services, other than E/M services, that are not normally reported together, but are appropriate under the circumstances.

What is the difference between 51 and 59 modifier?

Modifier 51 impacts the payment amount, and modifier 59 affects whether the service will be paid at all. Modifier 59 is typically used to override National Correct Coding Initiative (NCCI) Edits.