What is the difference between EPO and HMO plans?

What is the difference between EPO and HMO plans?

An Exclusive Provider Organization (EPO) is a lesser-known plan type. Like HMOs, EPOs cover only in-network care, but networks are generally larger than for HMOs. They may or may not require referrals from a primary care physician. Premiums are higher than HMOs, but lower than PPOs.