162.1201—Eligibility for a health plan transaction.
The eligibility for a health plan transaction is the transmission of either of the following:
(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.