Effective for dates of service on and after January 1, 2012, the MO HealthNet Division (MHD)will accept the 2012 versions of the Current Procedural Terminology (CPT) and the Health Care Procedure Coding System (HCPCS) medical code sets. Providers will not be able to bill the2012 versions of the code sets until January 20, 2012 due to time requirements to complete system updates.