ICD 10 CM Diagnosis Code E55.9 Vitamin D deficiency, unspecified When to use CPT code for B12 injection Medical Coding Guide Effective April 1, 2026, the Centers for Medicare & Medicaid Services (CMS) is implementing 80 new ICD 10 PCS procedure codes, focused heavily on new technology, cardiovascular improvements, and refined surgical procedures. Key additions 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) What Are Healthcare Common Procedure Coding System (HCPCS) Codes? Clinii Part 4: New ICD 10 Codes and IPPS Changes for 2023