Lake Superior Software, Inc., currently doing business as LSS Data Systems, Inc., develops, markets, and supports physician practice management software in the United States. The company offers Medical and Practice Management Suite, an ambulatory care solution for clinicians and administrative staff in practices and clinics. It also provides Physician Billing and Receivables system that includes open-item billing, claim and statement generation, electronic claims and electronic remittance, powerful custom report writer, reimbursement analysis and decision support tools, automated collections work list, and audit trail functions, as well as primary, secondary, tertiary, and cross-over claims. It serves hospitals, healthcare networks, integrated delivery systems, clinics, practice groups, and other healthcare enterprises.