| Department of Health and Human Services (HHS) | | http://www.hhs.gov/ |
| HIPAA Compliance Federation of America (HCFA) | | http://www.hcfa.com/ |
| Administrative Simplification | | http://aspe.os.dhhs.gov/admnsimp/ |
| National Committee on Vital and Health Statistics | | http://ncvhs.hhs.gov/index.htm |
| HHS Data Council | | http://aspe.os.dhhs.gov/datacncl/index.htm |
| General Accounting Office (GAO) | | http://www.gao.gov/ |
| Thomas (Website of Congress) | | http://thomas.loc.gov/ |
| Workgroup for Electronic Data Interchange (WEDI) | | http://www.wedi.org/ |
| National Council for Prescription Drug Programs | | http://www.ncpdp.org |
| Washington Publishing Company | | http://www.wpc-edi.com/HIPAA_40.asp |
| American National Standards Institute | | http://www.ansi.org/ |
| Data Interchange Standards Association | | http://www.disa.org/ |
| HIPAAdvisory | | http://www.hipaadvisory.com/ |
| HIPAAlert | | http://www.hipaadvisory.com/alert/ |