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! ICD 10 Mental Health Diagnosis Codes: F Codes & Z Codes UB 04 Form Locator Appendices Access and Billing Codes HIZENTRA Immune Globulin Subcutaneous (Human) 20% Liquid The HCPCS modifier FC stands for "Partial credit received for replaced device". It is used in facility billing, primarily for Medicare claims submitted by hospitals under the Outpatient Prospective Payment System (OPPS)