National Council for Prescription Drug Programs (NCPDP) An ANSI-accredited group that maintains a number of standard formats for use by the retail pharmacy industry, some of which are included in the HIPAA mandates. Related Terms: American National Standards; Standard; Legislation Files Containing This Term: legislation/45CFR-162.1102.html legislation/45CFR-162.1202.html legislation/45CFR-162.1602.html legislation/45CFR-162.1802.html legislation/45CFR-162.920.html