Find out how doctors rate health insurance plans. A sample of 6,000 physicians rated Blue Cross, Aetna, CIGNA, Harvard Pilgrim, Medical Mutual of Ohio, Kaiser, Oxford, Humana, HealthNet and UnitedHealthcare health insurance companies (payers) in 2014. On a scale of 1 (low) to 5 (high), the best can only muster a 3.3 overall rating. Scores indicate how easy a health plan is to do business with. By Medscape. Last published 2014. No updates available.