Are health care providers subject to the information blocking regulations even if they do not use any certified health IT?

Yes, any individual or entity that meets the definition of at least one category of actor—“health care provider,” “health IT developer of certified health IT,” or “health information network or health information exchange” —as defined in 45 CFR 171.102  is subject to the information blocking regulations in 45 CFR part 171. The information blocking regulations in 45 CFR part 171 apply to a health care provider, as defined in the Public Health Service Act and incorporated in 45 CFR 171.102, regardless of whether any of the health IT the provider uses is certified under the ONC Health IT Certification Program.