Office Address2020 W. Walnut St.Santa Ana, California 92703For directions click here(link is external) Mailing AddressP.O. Box 22006, Santa Ana, California 92702-2006Office HoursMonday-Friday, 8AM-5PMMain: 1-714/825-3174 | Fax: 1-714/825-3212www.ocihsspa.comFor comments or SuggestionsCall: 1-714/825-3174E-mail: PublicAuthority@ssa.ocgov.comMail: P.O. Box 22006,Santa Ana, California 92702-2006Provider Enrollment or to report a new hire call:1-714/825-3195For questions or information regarding the Provider Registry call:1-714/825-3202