Aetna Headquarters

Aetna headquarters sits at 151 Farmington Avenue in Hartford, Connecticut — the same red-brick Colonial Revival campus the insurer has occupied since 1931, even though Aetna itself has belonged to CVS Health since 2018. Below you will find the corporate office address, the phone numbers Aetna publishes on its own website (and why most member numbers live on your ID card instead), the mailing address for complaints and appeals, and the escalation path that actually works when a claim dispute stalls.

Aetna Headquarters Location and Contact Information

Aetna Inc. is headquartered at 151 Farmington Avenue, Hartford, CT 06156. Aetna’s official contact page lists this as the company’s mailing address, and CVS Health’s latest annual report describes the Hartford site as the principal office of its Health Care Benefits segment — an owned building complex of roughly 1.7 million square feet. Despite early speculation that the 2018 CVS Health acquisition would pull Aetna out of Connecticut, the insurer has stayed put in Hartford’s Asylum Hill neighborhood, where it has been based since the company was founded in 1853.

Keep in mind that the Hartford campus is an executive and administrative location, not a service center. You cannot walk in to discuss a claim, and letters sent there about a specific claim will be forwarded rather than handled on the spot. Aetna processes claims, appeals, and member correspondence through dedicated P.O. boxes (listed below), and the corporate parent, CVS Health, operates from a separate campus in Woonsocket, Rhode Island — covered in our CVS Health headquarters guide.

Phone Contacts

Aetna is unusual among big companies in that it does not publish a single all-purpose customer service number. Because it administers thousands of separate employer, individual, Medicare, and Medicaid plans, the Member Services number is printed on your ID card, and Aetna’s own help pages tell members to call that number first. The numbers below are the ones Aetna does publish on its official contact page and Medicare contact page:

• Corporate contact center (general questions, no member account access): 1-800-872-3862 (1-800-US-AETNA) — Monday to Friday, 8 AM to 6 PM ET
• Member Services (medical, dental, claims, benefits): the number on your Aetna ID card; or log in to your member website or the Aetna Health app and choose Help for phone, email, and chat options
• Aetna Medicare Advantage and Part D members: 1-844-826-5296 — 7 days a week, 8 AM to 8 PM
• Aetna Medicare Supplement members: 1-800-264-4000
• Medicare employer or group plans: 1-800-307-4830 — Monday to Friday, 8 AM to 9 PM ET
• Pharmacy questions (members): 1-888-792-3862 — Monday to Friday 7 AM to 11 PM ET, Saturday 7 AM to 9:30 PM ET, Sunday 8 AM to 6 PM ET
• CVS Caremark Mail Service Pharmacy: 1-800-227-5720 (TDD 1-800-823-6373)
• Providers — non-Medicare plans (benefits, claims, appeals, precertification): 1-888-632-3862 (1-888-MD-AETNA)
• Providers — Medicare medical and dental plans: 1-800-624-0756
• Providers — non-Medicare dental plans: 1-800-451-7715
• Providers — network and credentialing: 1-800-353-1232

The corporate line is worth knowing about even if you are a member: staff there cannot see your account, but they can tell you which Member Services number applies to your plan if your ID card is lost.

Customer Service and Support Channels

For most day-to-day tasks, the Aetna Health app and the member website are faster than the phone. Both show a digital ID card, claim status, deductible and out-of-pocket tracking, and a Help section that opens the phone, email, and secure chat options for your specific plan. Members who are not registered can still send a message through Aetna’s public contact form, though anything involving a claim will be routed to Member Services anyway. Medicare members have an additional online path: Aetna Medicare accepts complaints through an online form and publishes a printable complaint form that can be faxed or mailed.

Aetna maintains verified accounts on Facebook, Instagram, LinkedIn, and YouTube under the @aetna handle. Those channels are fine for general questions, but never post a member ID number or claim details publicly. One practical tip: have your member ID number and the claim or reference number from your Explanation of Benefits ready before you dial — Aetna’s phone system asks for both up front, and the Medicare line runs seven days a week, so a weekend call often means a shorter wait than a Monday morning.

Mailing Addresses for Claims, Complaints, and Appeals

Mail sent to the Hartford headquarters about a claim will be forwarded, which adds days. Use the addresses Aetna publishes for the purpose instead. The complaint and appeal address comes from Aetna’s official Member Complaint and Appeal Form, linked from its complaints, grievances and appeals page; the Medicare address is from the Aetna Medicare contact page.

When you mail an appeal, Aetna asks you to include the completed form (or a letter with the same details), copies of the bills or denial letters involved, and an Authorized Representative Form if you are appealing on behalf of a spouse, adult child, or anyone else. Keep a copy of everything and note the date it was sent.

Company Background

Aetna Life Insurance Company was founded in Hartford in 1853, taking its name from Mount Etna, the Sicilian volcano, as a nod to an earlier Aetna fire insurer that had built a strong reputation in the city. Over the next century it became one of the anchors of Hartford’s insurance industry: it wrote the life policies for America’s original seven astronauts in 1963 and, by its own account, paid the first Medicare claim in the country in 1966. The current headquarters building on Farmington Avenue, designed by James Gamble Rogers and completed in 1931, is often described as the largest Colonial Revival building in the world.

The company’s modern chapter began on November 28, 2018, when CVS Health completed its acquisition of Aetna in a cash-and-stock deal that valued the insurer at roughly $70 billion (about $78 billion including debt). Aetna now operates as CVS Health’s Health Care Benefits segment. According to CVS Health’s annual report for 2025, that segment served an estimated more than 37 million people as of December 31, 2025, through commercial, Medicare Advantage, Medicare Part D, Medicare Supplement, and Medicaid plans, backed by a network of more than 1.5 million care professionals. One recent change worth knowing: Aetna exited the Affordable Care Act public exchanges in every state effective January 2026, so individual marketplace plans are no longer sold under the Aetna name.

Leadership

Aetna does not have its own CEO. The business is led by Steve Nelson, Executive Vice President and President of Aetna, who was appointed on November 6, 2024, after earlier stints as CEO of UnitedHealthcare and of the primary-care company ChenMed. He reports to David Joyner, Chairman and Chief Executive Officer of CVS Health. Katerina Guerraz serves as Chief Operating Officer of Aetna and President of its Medicaid business. Aetna’s main insurance subsidiary, Aetna Life Insurance Company, is a Connecticut-domiciled insurer regulated by the Connecticut Insurance Department; you can look up Aetna’s Connecticut entities through the state registry — our Connecticut business search guide explains how.

Key Office Locations

Hartford remains Aetna’s center of gravity, with the 1.7-million-square-foot Farmington Avenue complex housing executive, actuarial, and operations staff. The parent company’s corporate headquarters is at One CVS Drive in Woonsocket, Rhode Island, where CVS Health’s executive team and investor relations are based. Much of Aetna’s member correspondence — appeals, Medicare mail, and many claims — is processed through P.O. boxes in Lexington, Kentucky, which is why so many Aetna addresses carry a 40512 ZIP code. Aetna’s Texas legal notice also lists a regional office at 750 W. John Carpenter Freeway, Suite 1200, Irving, TX 75039 for its Texas HMO and dental entities, and the Aetna Better Health Medicaid plans operate from state-specific offices listed on each plan’s website.

Dealing with Customer Complaints

Start with Member Services at the number on your ID card, and write down the date, the representative’s name, and the reference number for the call. If the answer is a denied claim or a decision you disagree with, file a formal appeal in writing: mail the Member Complaint and Appeal Form to Aetna, P.O. Box 14463, Lexington, KY 40512, or fax it to 859-425-3379. Aetna also accepts non-Medicare complaints online through the member website. A separate letter to the corporate office at 151 Farmington Avenue, Hartford, CT 06156 can help for service failures that are not really about a single claim, but it does not replace the formal appeal.

Health insurance is heavily regulated, so the third step depends on what kind of plan you have. Members of fully insured plans can complain to their state insurance department — Aetna’s complaints page lists every state’s contact, and in Aetna’s home state that is the Connecticut Insurance Department. Medicare Advantage and Part D members can file a grievance with Medicare at 1-800-MEDICARE. If your coverage comes through a self-funded employer plan, the regulator is the U.S. Department of Labor’s Employee Benefits Security Administration, reachable through askebsa.dol.gov or 1-866-444-3272. Finally, when an internal appeal upholds a denial for medical reasons, you have the right to an independent external review by a reviewer not employed by Aetna; small-claims court remains an option for unresolved money disputes.

Summary

Aetna’s headquarters is at 151 Farmington Avenue, Hartford, CT 06156, but nearly everything a member needs happens elsewhere: the Member Services number on your ID card, 1-844-826-5296 for Aetna Medicare members, the corporate contact center at 1-800-872-3862 for general questions, and P.O. Box 14463 in Lexington, Kentucky for written appeals. Looking for another company’s corporate contacts? Browse our other headquarters guides.

Frequently Asked Questions

Where is Aetna’s headquarters located?

Aetna Inc. is headquartered at 151 Farmington Avenue, Hartford, CT 06156, United States. The company has been based in Hartford since its founding in 1853.

What is Aetna’s customer service phone number?

Member Services numbers vary by plan and are printed on your Aetna ID card. Aetna Medicare Advantage and Part D members can call 1-844-826-5296, seven days a week from 8 AM to 8 PM, and anyone can reach the corporate contact center at 1-800-872-3862 (1-800-US-AETNA), Monday to Friday, 8 AM to 6 PM ET.

Who owns Aetna?

Aetna is a wholly owned subsidiary of CVS Health Corporation (NYSE: CVS), which completed its roughly $70 billion acquisition of Aetna on November 28, 2018. Aetna operates as CVS Health’s Health Care Benefits segment.

Who is the CEO of Aetna?

Aetna is led by Steve Nelson, Executive Vice President and President of Aetna, since November 2024. He reports to David Joyner, Chairman and CEO of CVS Health.

Where do I mail an Aetna appeal or complaint?

For non-Medicare plans, mail the Member Complaint and Appeal Form to Aetna, P.O. Box 14463, Lexington, KY 40512, or fax it to 859-425-3379. Medicare members should use the address on their plan’s complaint form or the Aetna Medicare mailing address, P.O. Box 14088, Lexington, KY 40512.

Is Aetna’s headquarters in Hartford or Woonsocket?

Both addresses are correct, for different companies. Aetna’s own headquarters is in Hartford, Connecticut; One CVS Drive in Woonsocket, Rhode Island is the headquarters of its parent, CVS Health.