serious emotional disturbance, orthopedic impairments, autism, traumatic brain injury, other health impairments or specific learning disabilities who by reason thereof need special education and other services. DISABILITY – shall mean (1) a physical or mental impairment that substantially limits one or more psychological, physiological or anatomical function of anatomical function of an individual or activities of such individual; (2) a record of such is impairment; or (3) being regarded as having such impairment. ESSENTIAL DRUG/MEDICINE – drug/medicine that satisfies the priority health care needs of the population and which is selected based on the evidence of its efficacy, safety and comparative cost effectiveness. ESSENTIAL DRUG LIST OR NATIONAL FORMULARY – a list of drugs prepared and periodically updated by the DOH on the basis of health conditions obtained in the Philippines as well as on internationally accepted criteria. ESTABLISHMENTS DISPENSING MEDICINES, MEDICAL DEVICES AND ASSISTIVE DEVICES – any drugstores, assistive device stores, government or private hospital pharmacies, medical clinics, optical clinics, audiology centers, and similar establishments dispensing medicines and selling assistive devices duly licensed or franchised by the FDA and/or the local government unit (LGU). FOODS FOR SPECIAL MEDICAL PURPOSES – category of foods for special dietary uses which are specially processed or formulated and presented for the dietary management of patients and maybe used only under medical supervision as described and define in FDA Codex STAN 180-1991. They are intended for the exclusive or partial feeding of patients with limited or impaired capacity to take, digest, absorb or metabolize ordinary foodstuffs or certain nutrients contained therein, or who have other special medically-determined nutrient requirements, whose dietary management cannot be achieved only by modification of the normal diet, by other foods for special dietary uses, or by a combination of the two. HEALTH CARE PROFESSIONAL – any licensed physician, dentist, nurse, midwife, allied medical practitioner, paramedical practitioner, or other health care professional or practitioner duly licensed to practice in the Philippines. IMPAIRMENT – any loss, diminution or aberration of psychological or physiological function with or without an accompanying anatomical structural defect. MEDICAL DEVICES – an instrument, apparatus, equipment, machine, contrivance, implant, in vitro reagent, or other similar or related article, including a component part, or accessory which is: (1) intended for use in the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease, in persons with disabilities; and (2) intended to affect the structure or any function of the body of PWDs, and which does not achieve any of its primary intended purposes through chemical action within or on the body of man or other animals and which is not dependent upon being metabolized for the achievement of any of its primary intended purposes. MEDICAL SERVICES – shall refer to the hospital room accommodation, hospital services, medical supplies, professional services of health care professionals, diagnostic services, and laboratory services that are necessary for the prevention, diagnosis, treatment, rehabilitation, and palliation of a persons’ disability, illness or injury. This should not be limited to hospital services but should include clinics and other health facilities. Further, it refers to health services which include but not limited to prevention of disability through immunization, nutrition, environmental protection and preservation; genetic counseling; early detection of disability; and timely intervention, medical or surgical, to arrest the disabling Intervention includes rehabilitation and provision of assistive devices. MEDICALLY NECESSARY – services required to preserve and maintain the health status of a person in accordance with accepted standards of the medical practice in the medical community. This includes services which are absolutely necessary in treating a patient and which could adversely affect the patient’s condition if it were omitted.