(a) A corporation holding a certificate of authority under this chapter may enter into contracts with licensed hospitals, licensed physicians, and other duly licensed medical services providers. (b) A copy of each contract form that a corporation, referred to in subsection (a) of this section, has with licensed hospitals, licensed physicians, and other duly licensed medical services providers shall be filed with the Mayor.
Filing of provider contracts
D.C. Code § 31-3507 — under Hospital and Medical Services Corporations Regulation..
D.C. Code § 31-3507