CPT vs HCPCS Codes: Know the Difference Medical coding can be complex, but understanding the basics is essential for accurate billing and reimbursement. CPT Codes (Current Procedural Terminology) Used for CPT 96372: Injection Billing Made Simple for Medical Practices The Professional Vitamin B12 Deficiency ICD 10 Billing Guide When coding for trigger point injections, the documentation must include the site of the injection, the total number of injections and the number of muscles involved. There are two CPT codes