20 C.F.R. § 10.820
How can an excluded provider request a hearing?
A request for a hearing shall be sent to the deciding official and shall contain:
(a) A concise notice of the issues on which the provider desires to give evidence at the hearing;
(b) Any request for the presentation of oral argument or evidence; and
(c) Any request for a certification of questions concerning professional medical standards, medical ethics or medical regulation for an advisory opinion from a competent recognized professional organization or Federal, State or local regulatory body.