Four healthcare companies will lay off a total of 236 Orange County workers in January, according to recent state filings.

Omnicare Inc., a Cincinnati-based pharmacy provider, will cut 99 workers in its Los Alamitos facility on Jan. 14.

Baxter International Inc., a diversified healthcare company based in Chicago, will lay off 74 workers at its Irvine plant on Jan. 24.

Seattle-based biotechnology company Dendreon Corp. is set to cut 62 jobs at its Seal Beach plant effective Jan. 16.

And Burlington, N.C.-based Laboratory Corp. of America will cut a job at its Irvine operation, effective Jan. 31.

The Orange County Workforce Investment Board reported the job cuts to the state Employment Development Department.