D.C. Code § 44-302.02: Standing referrals to specialists.

(a)

In general, subject to subsection (b) of this section, a health benefits plan shall permit a member to receive medically necessary or appropriate specialty care for more than one visit without having to obtain the insurer’s approval for subsequent visits authorized by a primary care provider.

(b)

Subsection (a) of this section shall not apply to specialty care if the insurer informs the member, orally and in writing, of any limitation on the choice of participating providers with respect to such care.