In 1990, LaTrobe University introduced the world's first Post-Graduate Diploma in Nosology, in response to unmet demand for diagnostic coders in Victoria. After the first graduates entered employment, a two-part study was undertaken. The composition, employment levels and projected institutional demand for the coding workforce (comprising medical record administrator coders, Nosologists and "unqualified" coders) were ascertained. In parallel, the current employment levels and projected demand for the institutional medical record administrator workforce also were investigated. The institutional variables of major health care role, annual inpatient discharges and operating sector were found to impact upon employment levels and demand for both workforces by current, prospective and non-employers. The study identified a minimal projected demand for nosologists, the reasons for which are postulated, and negligible projected demand for nonqualified coding personnel. The results highlight a health current and projected employer demand for both medical record administrators and medical record administrator coders.