Highmark Major Medical P.O. Box 890393 Camp Hill, PA 17089-0393 CompleteCare Individual Comprehensive Major Medical Highmark Blue Shield P.O. Box 898819 Camp Hill, PA 17089-8819 SpecialCare Highmark Blue Cross Blue Shield Claims P.O. Box 890062 Camp Hill, PA 17089-0062 Home Infusion Therapy (HIT) Highmark Blue Cross Blue Shield P.O. Box 2718.