Health bosses have apologised for teething problems after the launch of a new non-emergency patient transport service.
NSL Care Services started providing the non-emergency transport for the NHS in Lincolnshire on July 1.
But problems with the booking line has forced officials to apologise for any inconveniences.
Chris Dexter, general manager for NSL, said: "NSL Care Services would like to apologise to anyone who has experienced difficulty booking non-emergency patient transport in Lincolnshire using NSL's telephone number.
"We are adding ten additional call handlers and ten additional phone lines to reduce the waiting times callers are experiencing and we hope that callers will experience a much improved level of service.
"We will shortly be announcing details of a new e-mail address which patients can use to check their appointments.
Working on behalf of the health community, NSL Care will transport patients, who are eligible for patient transport, to and from their scheduled health appointments.