Access and Billing Codes HIZENTRA Immune Globulin Subcutaneous (Human) 20% Liquid Understanding the Z Codes in ICD 10 Page 2 of 3 The Rheumatologist 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 Medicare Part B Coverage for COVID and RSV Vaccines DocStation Blog DocStation Important Update for Medi Cal Rx Providers Starting in mid 2026, ICD 10 diagnosis codes will be required for all pharmacy claims. To help facilitate a smooth transition, we need to hear from you! Diagnostic Codes: ICD 10, ICD 11 & SNOMED CT Pabau