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! 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 Understanding the Z Codes in ICD 10 Page 2 of 3 The Rheumatologist Successfully Coding Retina Injectable Drugs Retina Today ICD 10 CM Diagnosis Code E55.9 Vitamin D deficiency, unspecified