Why choose nornorcal ambulance? NORCAL Ambulance – a locally-owned, private organization – has partnered with hospitals and healthcare systems throughout Northern California to solve their transportation challenges for over a decade. We are successful because we view ourselves as a customer service company that provides medical care and transportation.Why choose norcal group? NORCAL Group, now part of ProAssurance, offers a full spectrum of medical professional liability insurance solutions to physicians and other healthcare providers. As the needs of the healthcare industry have changed, so has NORCAL Group, keeping pace with the growing complexities and new risks physicians and practices face.What time does norcal close on labor day? All NORCAL Group offices will close early at 2:30 p.m. (in their respective time zones), Friday, Sept. 3rd, in honor of Labor Day. All offices will be closed for the holiday on Monday, Sept. 6th.