Here are some websites you can check for medical receptionist jobs in California:

1. Indeed.com: Indeed is a popular job search engine that aggregates job listings from various sources. You can search for medical receptionist jobs in California and filter by location to see jobs near you.
2. Glassdoor.com: Glassdoor offers job listings as well as company reviews and salary information. You can search for medical receptionist jobs in California and filter by location to see jobs near you.
3. ZipRecruiter.com: ZipRecruiter is a job search engine that allows you to search for jobs and apply directly through their website. You can search for medical receptionist jobs in California and filter by location to see jobs near you.
4. California Healthcare Jobs: This is a website dedicated to healthcare jobs in California. You can search for medical receptionist jobs by location and employer.
5. SimplyHired.com: SimplyHired is a job search engine that allows you to search for jobs and apply directly through their website. You can search for medical receptionist jobs in California and filter by location to see jobs near you.

Remember to tailor your resume and cover letter to the specific job you're applying for and to follow the application instructions carefully. Good luck with your job search!