In 2017, a state law extended it for non-emergency services https://californiahealthline.org/news/you-are-now-protected-...
The bill in question is for self-funded health insurance which is pretty rare https://californiahealthline.org/news/for-millions-of-insure...
Overall Summary https://www.benefitspro.com/2019/07/11/hospitals-block-calif...