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... ( orthodontic services only ) 24 - month waiting period for orthodontia services Aetna High 0 % 40 % 60 % 70 % $ 0 ( Out - of - Network Benefits ) GEHA Standard ( In - Network 1-877-434-2336 www.gehadental.com 0 % 45 % 65 % 50 % $ 0 ...