Spatial/service setting identifiers present in the Mental Health Services Dataset
| Spatial/service setting identifier | Description |
| Lower layer super output area | Local area of residence, based on 2001 Census boundaries, typically containing 672 households and 1614 residents |
| General practitioner practice | Primary care provider |
| National Health Service and independent sector provider trust | Provider of secondary mental healthcare |
| Primary care trust | Commissioner of secondary mental healthcare |