Code of Federal Regulations Title 45. Public Welfare § 45.162.1201 Eligibility for a health plan transaction

(a) An inquiry from a health care provider to a health plan, or from one health plan to another health plan, to obtain any of the following information about a benefit plan for an enrollee:

(b) A response from a health plan to a health care provider's (or another health plan's) inquiry described in paragraph (a) of this section.