TOPA Diagnostics accepts most insurance companies. Below is a list of the major insurance companies and networks in which TOPA is a participant. This directory, however, does not provide a comprehensive listing of TOPA’s participation status. To inquire about the participation status of any carrier not appearing below please call Client Services at (805) 373-8582.

AdmarMed Network
Aetna – All Plans
Anthem Blue Cross of CA – All Plans
Assurant Health
Beech Street *
Benefit Panel Service
Blue Card-Blue Cross Blue Shield – All Plans
Blue Shield of CA – All Plans
CA Children’s Service (CCS)
California Foundation for Medical Care
California Health & Wellness
CAPP Care PPO/ Beach Street
Care 1st
Champ VA
Cigna – All Plans
CNA Health Group
Community Care Network (CCN)
Community Health Group
Cooperative Benefit Administrators
Corporate Health Administration (PPO)
Coventry Healthcare
Family P.A.C.T
Federal Employee Program (FEP) BC BS
First Health Network
First Health Affordable
Fortis Insurance Company

Foundation Health Plan
Galaxy/MSC-Coalition America
GEHA (Government Employee Health Assoc.)
General American
Gold Coast
Guardian Resources, INC.
Health Net of California
HealthSmart Preferred Care
Inter Valley Health Plan
John Alden
John Hancock
Inter Plan (PPO)
Managed Healthcare
Magnacare (PPO)
Medicare of CA
National Preferred Provider Network (PPO)
MedAdvant Healthcare Solutions
Multiplan *
National Preferred Provider Network
New York Life
OneSource Health Network
Oscar Health Plan

Pacific Mutual
Paramount Care
Phoenix Mutual
PPO of Ventura County
Private Healthcare Systems (PHCS) *
Proamerica (PAMC)
Railroad Medicare
Regal Medical Group
SAMBA Health Plans
SCAN Health Plan
Sharp Health Plan
St. Mutual – All America
The Industry Health Network
The New England
Three Rivers Provider Network (TRPN)*
Time Ins.
Trustmark Benefit Trust
Unicare Life/Health Insurance Co.
United Mine Workers of America
USA Health Network (PPO)
Valley Care

Delivering pathology & cytology services to the medical community for 20 years.