CO4 GP catchment: which practices serve the CO4 postcode district
57,995 people living in the CO4 postcode district are registered with a GP (July 2026), 95% of them at 9 practices. The practice with the most is Mill Road Surgery in Colchester, with 15,452 (27%). The 3 largest together hold 60% of the district's registrations.
Latest data: July 2026. Registered patients by neighbourhood July 2026; GP Patient Survey 2026.
These are the practices people living in CO4 are actually registered with, from NHS England's count of registered patients by neighbourhood; a practice's own catchment boundary can be wider or narrower. The district is mostly in Colchester.
| Practice | Town | Residents registered | Share | Overall experience good | CQC rating |
|---|---|---|---|---|---|
| Mill Road Surgery | Colchester | 15,452 | 27% | 84% | Good |
| Colchester Medical Practice | Colchester | 12,739 | 22% | 87% | Good |
| Highwoods Surgery | Colchester | 6,755 | 12% | 70% | Good |
| Abbey Field Medical Centre | Colchester | 6,406 | 11% | 66% | Good |
| Colchester Medical Limited | Colchester | 6,144 | 11% | 75% | Good |
| Bluebell Surgery | Colchester | 2,974 | 5% | 77% | – |
| Creffield Medical Group | Colchester | 2,776 | 5% | 74% | Good |
| East Hill Surgery | Colchester | 1,526 | 3% | 83% | Good |
| Rowhedge & University of Essex Medical Practice | Colchester | 1,117 | 2% | 66% | – |
| Ardleigh Surgery | Colchester | 1,011 | 2% | 77% | – |
Across the 10 practices serving CO4 with survey results, the share of patients describing their overall experience as good ranges from 66% at Abbey Field Medical Centre to 87% at Colchester Medical Practice, with a median of 76% (England: 77%). 2 are above England and 2 below by more than the survey's margin of error. Bluebell Surgery has the highest share finding it easy to get through by phone (81%, England 57%).
Which GP practices serve CO4?
Mill Road Surgery, Colchester Medical Practice, Highwoods Surgery, Abbey Field Medical Centre and Colchester Medical Limited have the most registered patients living in CO4.
How many people in CO4 are registered with a GP?
57,995, 95% of them at 9 practices.
Which GP near CO4 do patients rate highest?
Among the practices serving the district, Colchester Medical Practice: 87% of its patients rated their overall experience good in the 2026 GP Patient Survey.