42 C.F.R. § 405.822 Parties to a carrier hearing.
Title 42 - Public Health
The parties to a hearing shall be the persons who were parties to the carrier's review determination (§405.808) which is in question. Any other person may be made a party if that person's rights with respect to supplementary medical insurance benefits may be prejudiced by the decision. [39 FR 12097, Apr. 3, 1974. Redesignated at 42 FR 52826, Sept. 30, 1977, as amended at 59 FR 12183, Mar. 16, 1994]
Title 42: Public Health
PART 405—FEDERAL HEALTH INSURANCE FOR THE AGED AND DISABLED
Subpart H—Appeals Under the Medicare Part B Program
§ 405.822 Parties to a carrier hearing.

