Wiki L1 Modifier

[kendalb]

When should the L1 modifier be utilized?

 

[thomas7331]

The L1 modifier is only used on facility UB claims. It's to indicate that a lab service should not be packaged with other services billed on the same UB claim because the lab is clinically unrelated to those other services due to being ordered by a different provider and for a different diagnosis. It's sort of like a 59 modifier for separating out labs from other outpatient hospital services for payment purposes.

 

[kendalb]

Should a claim with lab services only be billed with the L1 modifier?