Source:http://linkedlifedata.com/resource/umls/id/C0002423
MSH: Health care services provided to patients on an ambulatory basis, rather than by admission to a hospital or other health care facility. The services may be a part of a hospital, augmenting its inpatient services, or may be provided at a free-standing facility.,CSP: services rendered by members of the health profession (or under their supervision) for the benefit of patients who come to the hospital or clinic for diagnosis or treatment but do not occupy a bed.