How Northwind Health Cut Patient Acquisition Cost by 41%

The problem\n\nNorthwind was paying $412 per acquired patient across paid search with no view of downstream retention.\n\n## The build\n\nA HIPAA-conformant identity layer joined intake forms to anonymized outcome cohorts. No PHI left the boundary.\n\n## Result\n\n| Metric | Before | After |\n| --- | --- | --- |\n| CAC | $412 | $243 |\n| Intake completion | 51% | 74% |\n\nThe program paid back in 4.5 months.