The Centers for Medicare and Medicaid Services is the agency charged with maintaining and updating the ICD-10-PCS. The most current revisions were released by CMS in parallel with new ICD-9-CM codes valid October 1, each year. A summary of the changes may be found on the CMS website at: http://www.cms.hhs.gov/ICD10/Downloads/pcs_whats_new_2013.pdf
