What is Catchment?
A hospital’s catchment is the geographic area its patients come from, often defined by travel time rather than distance. Catchments differ by specialty: routine care draws locally, while complex procedures can draw from several states or other countries.
Why it matters for hospitals
Catchment sets where marketing money should go. Advertising outside a realistic catchment wastes budget, while ignoring secondary catchments for high-end specialties leaves demand on the table.
How to put it into practice
- Map patient pin codes from registration data, by specialty.
- Draw travel-time bands rather than radius circles.
- Set local search and ad targeting to match each specialty’s real catchment.
- Track share of patients from each zone over time to spot growth or erosion.
The common mistake
Using one catchment for the whole hospital. A maternity unit and a transplant programme have very different maps.
An illustrative example
A tertiary hospital finds its oncology patients come from a 300 km band across smaller towns. It shifts spend to outreach clinics and regional-language content in those districts. (Composite example, not a specific hospital.)
Related terms
Further reading
- The three demand pools a hospital group runs on
- Opening in a new city: what transfers and what does not
- Hospital digital marketing in India: key statistics 2026
Part of the healthcare growth and digital glossary. Last reviewed 3 October 2026.