Andy Camm, clinical lead for Lincolnshire and District Medical Services, which is offering the service, said: "We know that when winter comes and the temperature drops people are more likely to become unwell - particularly people who have asthma and COPD.
"If you are struggling to get a GP appointment, there is an appointment at the acute respiratory hub that we could offer to see you on the same day," he said.
Mr Camm said people who did not receive prompt treatment often ended up in hospital.
He said the scheme would help to reduce the number of hospital admissions and reduce pressure on urgent care centres and A&E departments.
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