title: Modifier usage for hospital outpatient services.
authors.forename: A
authors.initials: A
authors.lastname: Zeisset
mesh_terms: D000043:Abstracting and Indexing; D000553:Ambulatory Care / Q000145:classification / Q000191:economics; D004496:Education, Continuing; D005568:Forms and Records Control; D017408:Guidelines as Topic; D007344:Insurance Claim Reporting / Q000145:classification*; D008499:Medical Records / Q000145:classification*; D010044:Outpatient Clinics, Hospital / Q000191:economics*; D014481:United States