Maryland Code, Insurance § 15-816

(1) insurers and nonprofit health service plans that provide hospital, medical, or surgical benefits to individuals or groups on an expense-incurred basis under health insurance policies that are issued or delivered in the State; and

(2) health maintenance organizations that provide hospital, medical, or surgical benefits to individuals or groups under contracts that are issued or delivered in the State.

(1) shall classify an obstetrician/gynecologist as a primary care provider; or

(2) if the obstetrician/gynecologist chooses not to be a primary care provider, shall allow a woman to receive routine gynecological care from an in-network obstetrician/gynecologist without requiring the woman to visit a primary care provider first, if:

(d)(1) An entity subject to this section shall allow a woman to receive medically necessary, routine obstetric and gynecological care from an in-network, certified nurse midwife or any other in-network provider authorized under the Health Occupations Article to provide obstetric and gynecological services without first requiring the woman to visit a primary care provider.

(2) A certified nurse midwife or other nonphysician provider authorized under the Health Occupations Article to provide obstetric and gynecological services shall consult with an obstetrician/gynecologist with whom the certified nurse midwife or other provider has a collaborative agreement, in accordance with the collaborative agreement, regarding any care rendered under this subsection.