| Professional/1500 Claims | No Enrollment Required |
| Institutional/UB Claims | No Enrollment Required |
| Electronic Remittance (ERA) | No Enrollment Required |
| Prospect Medical Group |
| PROSPECT MEDICAL SD |
| PROSPECT REGION B |
| PROSPECT NW MEDICAL GROUP |
| LOS ANGELES MEDICAL CENTER IPA |
| PROSPECT PROVIDER GROUP-TEXAS |
| PROSPECT MEDICAL SYSTEMS |
| PROSPECT HEALTH SOURCE |
| Cal Care IPA |
| Vantage Medical Group |
| GENESIS HEALTHCARE OF SOUTHERN CA |
| Pomona Valley Medical Group |
| ProMed HealthCare Administrators |
| 3287 |
| 8684 |
| PROSPECT MEDICAL IE |
| UNITED CARE MEDICAL GROUP |
| PROSPECT STARCARE MEDICAL GROUP |
| AMVICARE |
| AMVI MEDICAL GROUP |
| HEALTH EXCEL IPA INC |