what is ud modifier used for
The UD modifier should be billed on the CMS-1500/837 â¦. 340B & Medicaid â 340BPVP Document Repository. A UD Modifier, is used for physician administered claims â¦ drug by reporting. modifier âUDâ in conjunction with â¦ Dually eligible for Medicaid/Medicare. CMS-1500 Billing Guide â Mass.Gov. Claims for Members with Medicare or Other Health-Insurance Coverage .