Aetna vs Blue Cross Blue Shield: how do they differ for employers?

Employers who search “Aetna vs Blue Cross” are often looking at two quotes on the same desk. Because Blue Cross Blue Shield is a brand shared by many companies, the comparison is really between Aetna and the particular Blue company that serves your area.

Who you are comparing

Aetna is owned by CVS Health. Its commercial business covered about 18.3 million people at June 30, 2026, mostly in self-funded plans, and the American Medical Association puts it third in the national commercial market with about 12%.

Blue Cross Blue Shield is not one company. About 33 independent companies hold the Blue license, each for its own area: Florida Blue in Florida, Anthem in 14 states including Georgia and much of New York, Blue Cross and Blue Shield of Texas, and so on. The AMA found that Blue companies together hold about 43% of the commercial market and lead in 84% of the metro areas it studied.

Side by side

Small employers

Aetna sells a level-funded product line to small businesses called Aetna Funding Advantage. It left Connecticut’s fully insured small group market in 2024.

Many Blue companies sell small group plans, and several, such as Blue Cross and Blue Shield of Texas (Blue Balance Funded) and Florida Blue, also sell level-funded plans. What each Blue offers, and to which group sizes, differs from company to company. See our level-funded plans guide for how level-funded arrangements work in general.

Networks and staff in other states

The Blue Cross Blue Shield Association says Blue companies contract with 97% of physicians and 83% of hospitals across the country.

Outside its area, a Blue plan relies on BlueCard: the program that links the Blue companies’ networks across the country. Aetna uses its own national network everywhere, citing about 2.0 million participating providers in its 2025 annual report. The two sides count differently, so these figures are not a like-for-like comparison.

Contracts change, and carriers on both sides have disputes with hospitals: in 2026, for example, Spartanburg Regional in South Carolina left Aetna’s network, and Mount Sinai in New York was out of Anthem’s network for several months before a new deal.

CVS links

Aetna shares an owner with CVS Caremark, the pharmacy benefit manager, and with the CVS stores and MinuteClinic locations, of which there were more than 800 at the end of 2025. Each Blue chooses its own pharmacy benefit manager.

Member ratings

In J.D. Power’s 2026 commercial member study, Aetna ranked highest in the East South Central region. Blue companies ranked highest in 11 of the 22 regions, among them Florida Blue (tied with Cigna), Blue Cross and Blue Shield of Illinois and three Anthem plans. Results are for particular companies in particular regions, so look up the Blue that serves you.

Recent changes

Aetna left the individual (ACA) exchanges from January 2026, which largely explains the fall in its fully insured membership, while its self-funded membership has grown. On the Blue side, a settlement of a long antitrust case lets qualifying large national employers ask for a second Blue bid; it does not affect small or fully insured groups.

Questions to ask a broker about these two carriers

1. Which Blue company serves our headquarters, and will it and Aetna both quote a group our size?
2. Which funding types will each carrier offer a group our size in our state?
3. Which of my employees’ doctors and nearest hospitals are in each carrier’s network?
4. How would staff outside our state be covered under each carrier’s network arrangements?
5. How have each carrier’s renewals run for similar groups here?

If you are in Florida, our Florida group health insurance guide describes the market there. Our group health insurance quotes page explains what a broker will ask for, and the form below connects you with a licensed broker.

How we write these: every comparison uses the carriers' own published information, their parent companies' filings and independent surveys, each listed below with its date. We are not paid by, affiliated with or endorsed by any carrier, and we do not rank them, describe their plan benefits or recommend any plan. Carrier and product names are trademarks of their owners. Plans, networks and prices vary by state, county and group size: only a licensed broker or the insurer can say what is available to your business and explain its terms.