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Service Contact Information

Main Customer Service Line

  • Phone: 213.275.0330

  • Hours: Mon-Fri., 8:30am – 5:00pm

  • Email:

  • For: Eligibility, Referrals, Claims, Provider and Member Inquiries


Claims Submission

  • Preferred Method: OfficeAlly

  • Claims Payer ID: VUIPA
    **To set up an Office Ally account, please call 213.275.0330**

  • By Mail: 18000 Studebaker Road # 100 Cerritos CA 90703

  • Claims: 213.275.0330

Case Management

To report an admission



To add patient urgently:

Utilization Management

    • Routine Referrals: 866.289.7058

    • Urgent Referrals: 866.289.7058

    • Inpatient Case Management: 866.230.2175

  • UM Email:

  • UM Phone: 213.275.0330


Web Portal Assistance

  • Email:

  • Phone: 213.275.0330
    **You can email the web portal team regarding portal troubleshooting, technical support and login assistance**

Provider Services

How to Become a Contracted Provider

  1. Complete a cover letter addressed to CareAccess MSO with your name, specialty, practice address, phone and fax.

  2. Complete an IRS W9 form.

  3. FAX both completed pages to: Jessica Martinez, Provider Relations Dept: 562.269.5825.


Once both your cover letter and W-9 forms are received and reviewed, we will mail you credentialing paperwork for your review and signature. Fill out completely and mail back to Provider Relations Department at: 
18000 Studebaker Road, Suite 100, Cerritos CA 90703


Once you are fully contracted and credentialed you will be added to the Website: and be able to receive referrals from PCPs, and see their patients!