On January 16, 2009, HHS published a final rule announcing updated HIPAA electronic transaction standards, including updated versions of the health care transactions standard (i.e., for claims, remittance, and eligibility requests) and the pharmacy claims transactions standard. The rule also adopts a standard for Medicaid pharmacy subrogation transactions, through which state Medicaid agencies recoup payments for pharmacy services when a third party payer has primary financial responsibility. The compliance date is January 1, 2012 (although small health plans have an additional year to comply with the Medicaid pharmacy subrogation standard). Separately, HHS published a notice announcing the Secretary’s recognition of certain Healthcare Information Technology Standards Panel Interoperability Specifications and the standards they contain as ‘‘Interoperability Standards’’ for health information technology.