Sufficiency Standards. Using the zip code list on the Maryland Insurance Administration’s website, each provider panel of a carrier shall have within the geographic area served by the carrier’s network or networks, sufficient dentists, including specialty providers, and facilities to meet the maximum travel distance standards listed in the chart under §A(2) of this regulation for each type of geographic area measured from the enrollee’s place of residence. Chart of Travel Distance Standards. Each provider panel of a carrier shall include at least 20 percent of the available essential community providers who provide dental services in each of the urban, rural, and suburban areas.