Where is the clerk of record in contra costa county ca? Contra Costa County Clerk-Recorder 555 Escobar Street Martinez, CA 94553 For questions, please contact us at 925-335-7900 between the hours of 8:00am-4:00pm, Monday through Friday (excluding County Holidays), and press “0” to speak to a live representative.How do i contact contra costa employment human services ehsd? If you have Medi-Cal questions, please contact Contra Costa Employment & Human Services (EHSD) or call 1-866-663-3225.How do i apply for ihss in contra costa county? To apply for IHSS in Contra Costa County, contact an IHSS office of the Employment & Human Services department. It is best to telephone. There is no need to come to the office as staff will come to your home. To apply, call: This number is staffed during business hours, but has a message machine for night or weekend calls.