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Leadership Team

Meet the Banner|Aetna Leadership Team

Thomas J. Grote

Chief Executive Officer

Thomas J. Grote leads the Banner|Aetna joint venture as Chief Executive Officer. He’s responsible for:

  • Building a more sustainable model of care enhanced by a unique member experience for members in Arizona
  • Improving product offerings while lowering costs
  • Creating a clinically connected network and growing Banner|Aetna’s footprint throughout the state

Before becoming the CEO of BannerlAetna, Grote managed operations of Aetna’s Arizona and New Mexico markets for a year and a half. He also oversaw the west territory markets, including California, Alaska, Oregon, Washington, Colorado, Nevada and Utah.

Before moving to Arizona, Grote served as president of Aetna's Capitol market from 2010-2015. This market includes Maryland, DC, and Virginia.

Grote joined Aetna in 1987 as an employee benefits representative. He’s held a variety of sales and profit and loss management roles throughout his 30-year career.

Grote graduated from the University of Notre Dame. There, he earned his Bachelor of Arts in Finance. And in 1988, he received his Certified Employee Benefits Specialist designation.

Joanne Mizell

Chief Operating Officer

Joanne Mizell joined Banner|Aetna as Chief Operating Officer in February 2018, with over 20 years Aetna experience and nearly 30 years in the Employee Benefits industry. In this role, and as a member of the executive leadership team, Mizell will oversee operations of the organization and support the execution of the strategic goals set by Banner|Aetna’s Board of Directors and Chief Executive Officer.

Mizell is a proven leader who has consistently delivered growth to various organizations and market segments by developing strong teams, crafting creative strategies and fostering deep community and client relationships. As Chief Operating Officer of Banner|Aetna, Mizell leverages her experience and well-established network in Arizona to execute the organization’s mission of helping employers improve the health and well-being of their workforce, while simplifying the coverage-to-care-to-payment of health care for its members.

Mizell started her career in Orange County and Los Angeles, California before relocating to Arizona in 1998. Mizell’s previous roles at Aetna Included building sales and service teams for large employers, managing the growth, client satisfaction, and profit & loss for a four state market that included Arizona. Mizell also led the creation and build of a new product portfolio for Aetna's National Accounts segment, simplifying the selection, purchasing and administration of voluntary products for Aetna’s largest clients. Outside of Aetna, Mizell was a broker/advisor at an international insurance brokerage firm, where she served as lead health care and benefits design strategist for larger, complex clients.

Mizell has also worked in both paid and volunteer leadership roles for several humanitarian and animal protection organizations. She continues to be actively involved in formal local and state advocacy aimed at improving lives through proposed legislative and policy changes in Arizona and in the United States.

Prior to beginning her career at Aetna, Mizell studied Business Administration at California State University at Fullerton, while working full-time in the employee benefits department of Hughes Aircraft Company. Making lives better by delivering best-in-class employee benefits has been her career journey ever since. Mizell’s role at Banner|Aetna takes that experience and passion to the next level.

Dr. Robert Groves

Chief Medical Officer

As Executive Vice President and Chief Medical Officer, Banner|Aetna, Dr. Groves is responsible for physician leadership in population health management. He’s also responsible for delivering on clinical performance and utilization management in the volume to value transition.

Dr. Groves earned his M.D. degree from the Medical College of Georgia. He completed Internal Medicine training at the University of Texas Southwestern Medical Center. He also completed fellowships in Critical Care Medicine and Pulmonary Diseases at the University of Alabama at Birmingham.

Dr. Groves also serves as Chief Medical Officer, Banner|Aetna.


Dan Keller

Chief Financial Officer

Dan Keller joined Banner|Aetna as the Chief Financial Officer in August of 2017. In this role, Keller oversees the financial performance of Banner|Aetna and supports the CEO in driving the strategic plan.

Keller joins Banner|Aetna with over 20 years of health care management experience mostly in finance, actuarial and underwriting roles. Previously, he served as CFO of Aetna’s Arizona, Colorado, and New Mexico markets. Before relocating to Arizona in 2014, Dan was the Head of America’s pricing for Aetna International based in Hartford, CT.

Dan is a graduate of the University of Wisconsin – Eau Claire, where he received his Bachelor of Science in Mathematics.

Transforming health care, together

Banner|Aetna aims to offer access to more efficient and effective member care at a more affordable cost. We join the right medical professionals with the right technology, so members benefit from quality, personalized health care designed to help them reach their health ambitions.

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Health benefits and health insurance plans are offered, underwritten, and/or administered by Banner Health and Aetna Health Insurance Company and/or Banner Health and Aetna Health Plan Inc. (Banner|Aetna). Banner|Aetna is an affiliate of Banner Health and of Aetna Life Insurance Company and its affiliates (Aetna). Each insurer has sole financial responsibility for its own products. Aetna and Banner Health provide certain management services to Banner|Aetna.  Aetna and CVS Pharmacy® are part of the CVS Health family of companies. Aetna and MinuteClinic, LLC (which either operates or provides certain management support services to MinuteClinic-branded walk-in clinics) are both within the CVS Health family.

Access to the 98point6 application is included in all Banner|Aetna ACA individual & family plans. 98point6 is not available in all Banner|Aetna plans offered through employers. 98point6 is a registered trademark of 98point6 inc.

This material is for information only and is not an offer or invitation to contract. Providers are independent contractors and are not agents of Banner l Aetna. Provider participation may change without notice. Health information programs provide general health information and are not a substitute for diagnosis or treatment by a physician or other health care professional. Information is believed to be accurate as of the production date; however, it is subject to change.

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