For GSMPA Physicians

Prospect Medical Aerial Care Provider Portal

Provider Relations

Toll Free: 800-891-2978

Monday – Friday
8:00a.m. – 5:00p.m.

Claims and Encounters Data Submission

Via Office Ally:
Provider ID - PROSP

Via Mail:
P.O. Box 11466
Santa Ana, CA 92711

Inpatient After Hours Inquiries:
714-796-5900, option 1, option 1

GSMPA is proudly managed by Prospect Medical Systems.

Prospect Medical Systems, a healthcare management services organization (MSO), provides administrative support services to individual physicians and group practices. One of the primary purposes of an MSO is to relieve physicians of non-medical business functions so they can focus on the clinical aspects of their practices.

In addition, Prospect has earned “Elite” status from APG “American Physicians Group” four the last four years.

Please visit for more information.