CO3 GP catchment: which practices serve the CO3 postcode district
37,797 people living in the CO3 postcode district are registered with a GP (July 2026), 95% of them at 7 practices. The practice with the most is Ambrose Avenue Group Practice in Colchester, with 9,348 (25%). The 3 largest together hold 65% 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 CO3 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 |
|---|---|---|---|---|---|
| Ambrose Avenue Group Practice | Colchester | 9,348 | 25% | 66% | – |
| Creffield Medical Group | Colchester | 8,243 | 22% | 74% | Good |
| Tollgate Medical Centre | Colchester | 6,857 | 18% | 64% | – |
| Colchester Medical Practice | Colchester | 5,871 | 16% | 87% | Good |
| Dr Abiodun Obisesan | Colchester | 3,841 | 10% | 76% | Good |
| Abbey Field Medical Centre | Colchester | 1,134 | 3% | 66% | Good |
| East Hill Surgery | Colchester | 989 | 3% | 83% | Good |
| Colchester Medical Limited | Colchester | 795 | 2% | 75% | Good |
Across the 8 practices serving CO3 with survey results, the share of patients describing their overall experience as good ranges from 64% at Tollgate Medical Centre to 87% at Colchester Medical Practice, with a median of 75% (England: 77%). 1 is above England and 3 below by more than the survey's margin of error. Colchester Medical Practice has the highest share finding it easy to get through by phone (77%, England 57%).
Which GP practices serve CO3?
Ambrose Avenue Group Practice, Creffield Medical Group, Tollgate Medical Centre, Colchester Medical Practice and Dr Abiodun Obisesan have the most registered patients living in CO3.
How many people in CO3 are registered with a GP?
37,797, 95% of them at 7 practices.
Which GP near CO3 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.