Diagnostic Codes: ICD 10, ICD 11 & SNOMED CT Pabau ICD 10 CM Diagnosis Code E55.9 Vitamin D deficiency, unspecified Access and Billing Codes HIZENTRA Immune Globulin Subcutaneous (Human) 20% Liquid 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 Successfully Coding Retina Injectable Drugs Retina Today