US No Surprises Act (42 USC 300gg-111 to 300gg-139) and 45 CFR Part 149 300gg-115(a)(1)-(2),(4)-(6): Keep a public provider directory database, verify every entry at least every 90 days, remove unverifiable providers and update within 2 business days of provider notice

For plan years beginning on or after 1 January 2022 each plan and issuer must maintain on its public website a database listing every provider and facility with which it has a direct or indirect contract, with each one's name, address, specialty, telephone number and digital contact information; must verify and update that information not less than every 90 days; must have a procedure to remove a provider or facility whose information it cannot verify within a period it sets; must update the database within 2 business days of receiving information from a provider or facility under 42 U.S.C. 300gg-139; and must print in any paper directory a notice that it was accurate as of publication and that the database or the plan should be consulted for current information.