Master of Health Administration Multiple Headset Adapter Minimum Holding Altitude Master of Healthcare Administration Master of Hospital Administration Maximum hypothetical accident Mental Health Act Mental Health Association Microangiopathic hemolytic anemia Military Housing Area Modular Headend Architecture Mott-Hubbard-Anderson Maintenance Hazard Analysis Man Hour Accounting Manhattan Pharmaceuticals, Inc. Manila Hemp Association Marine Historical Association Masters in Healthcare Administration Master's of Health Administration Masters of Healthcare Administration may hegglin anomaly May-Hegglin anomaly measured haplotype analysis Medal for Humane Action medial hypothalamic area membrane hypothesis of aging Mental Health Act 1983 Methaemalbumin methionine hydroxy analog methylhippuric acid