Claims Department:
 Fax: 626-388-2314
 E-mail: claims@chmso.org

 Contracting Department:
 Fax: 626-388-2330

 Credentialing Department:
 Fax: 626-388-2344

 Eligibility Department:
 Fax: 626-388-2354

 IS Department:
 Fax: 626-388-2317
 E-mail: isdept@chmso.org

 Marketing Department:
 Fax: 626-388-2327
 E-mail: marketing@chmso.org

 Member Services:
 Fax: 626-388-2345
 E-mail: membersvcs@chmso.org

 UR Department:
 Fax: 626-388-2336
 E-mail: umdept@chmso.org