Medicare: What's New For 2022 In medical coding, HCPCS Modifier JB is an informational modifier indicating a drug was administered subcutaneously (under the skin) when the HCPCS code allows for multiple administration routes, like intravenous (IV) or Coding Guidelines and Applications (HCPCS, ICD 10 PCS, and ICD 10 CM) Nurse Key The Association of Retinal Disease with Vision Impairment and Functional Status in Medicare Patients Published in Journal of Health Economics and Outcomes Research