Wednesday 8am - 5pm. Thursday 8am - 5pm. Friday 8am - 5pm (North Clinic 8am - 1:00pm) After 4:30pm our phone calls are directed to an answering service. They will direct your message to an on call nurse or provider. You will be contacted as soon as they are available. Lab Hours: 8:30 - 11:30 & 1:00 - 4:00. A physician is on call 24 hours per ....