A medical practice with almost 2,000 patients is facing potential closure unless a new doctor can be found to run the service.
NHS England have started a consultation on the future of Chantry Bridge Medical Centre in Rotherham, which has 1,778 patients on its books.
The current contract to run the service, which is operated by Care UK, is ending on September 30.
The practice shares a building on Greasbrough Road with an NHS Walk-In Centre separately managed by Rotherham Clinical Commissioning Group.
The walk-in service is not going to be affected in the short-term, although it is due to be moved to the emergency centre at Rotherham Hospital in autumn 2016.
Two options are being offered to patients - the first being to close the surgery and move patients to other nearby practices.
The alternative is to find a new doctor to run the practice close to the current Greasbrough Road site, potentially with longer opening times.
An NHS England spokeswoman said there is no scope for the surgery to stay in its current location under new management.
She said: “The current provider, Care UK, uses the same accommodation and rooms to see patients whether they are registered patients seen under the contract they have with NHS England, or whether they are walk-in patients and seen under the contract they have with Rotherham CCG. They will still be using all of the accommodation and rooms to continue providing the walk-in contract until Autumn 2016/Spring 2017 and there will be no free space for any other provider/GP to use.”