CFR›Title 45›Subtitle A›Part 171›Subpart A ContainsSections 171.100–171.103CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart A—General Provisions Sections 171.100 § 171.100 Statutory basis and purpose. 171.101 § 171.101 Applicability. 171.102 § 171.102 Definitions. 171.103 § 171.103 Information blocking. Next B Subpart B—Exceptions That Involve Not Fulfilling Requests to Access, Exchange, or Use Electronic Health Information