Except for a Group Model HMOs health benefit plan, the provider panel for each carrier shall meet the provider-to-enrollee ratio standards listed in §B of this regulation. The provider-to-enrollee ratios shall be equivalent to at least 1 full-time physician, or as appropriate, another full-time provider for: 1,200 enrollees for primary care; 2,000 enrollees for pediatric care; 2,000 enrollees for obstetrical/gynecological care; 2,000 enrollees for mental health care or services; and 2,000 enrollees for substance use disorder care or services. The ratios described in §B of this regulation shall be calculated based on: The number of enrollees covered under all health benefit plans issued by the carrier in Maryland that use that provider panel; and The number of providers in that provider panel with practicing locations: In Maryland; or Within the applicable maximum travel distance standard specified in Regulation .05 of this chapter outside the geographic boundaries of Maryland.