There are two options to locate a psychiatrist, psychologist, clinician, nurse practitioner or clinic: Use the Cigna Provider Directory Enter an address, city or zip code, then select Doctor by Type, Doctor by Name or Health Facilities. Select Log In/Register or Continue as Guest. To determine if the provider is in-network, check the Plans Accepted at this Location to make sure Open Access Plan (OAP) or Choice Fund OA Plus is listed. Call Cigna at (800) 862-3557.