CB is a valid 2023 HCPCS Modifier that could be used to indicate Service ordered by a renal dialysis facility (rdf) physician as part of the esrd beneficiary's dialysis benefit, is not part of the composite rate, and is separately reimbursable.

CB Modifier has been in effect since Jan 01, 2004.

Short description for CB HCPCS Modifier code:

Esrd bene part a snf-sep pay