title: Development of a service complexity classification system: one HMO's experience.
mesh_terms: D000043:Abstracting and Indexing; D000553:Ambulatory Care / Q000145:classification*; D003625:Data Collection; D003953:Diagnosis-Related Groups / Q000379:methods*; D004219:District of Columbia; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D007256:Information Systems; D008331:Management Information Systems; D008396:Maryland; D014768:Virginia