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MA Enrollment Explorer / States / Tennessee

Medicare Advantage in Tennessee: enrollment, penetration and market share

825,588 people in Tennessee were enrolled in Medicare Advantage in October 2026. 53.6% of the state's 1,539,671 eligible Medicare beneficiaries are in Medicare Advantage, +0.1 pts since October 2025. UnitedHealth Group, Inc. is the largest parent organization with 28% of reported enrollment; 17 parent organizations have 11 or more members, and the market's HHI is 2,260 (highly concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in Tennessee changed by +10,972 (+1.4%).

53.6%MA penetration, October 2026
826KMA enrollees
17parent organizations (11+ members)
2,260HHI, highly concentrated
Open Tennessee on the market mapMSSP ACOs in Tennessee

Parent organizations in Tennessee

Parent organizationMembersChangeShareShare change
UnitedHealth Group, Inc.231,909−12,99228.3%−2.3 pts
BlueCross BlueShield of Tennessee215,210+14,66926.2%+1.2 pts
Humana Inc.207,686+17,43125.3%+1.6 pts
Health Care Service Corporation86,399+35410.5%−0.2 pts
Elevance Health, Inc.29,577−2,4263.6%−0.4 pts
CVS Health Corporation19,032−9052.3%−0.2 pts
Devoted Health, Inc.10,239+3,9911.2%+0.5 pts
Centene Corporation9,844−1,2121.2%−0.2 pts
Blue Cross Blue Shield of Michigan Mutual Ins. Co.4,692−1700.6%−0.03 pts
Zing Health Consolidator, Inc2,273+6160.3%+0.1 pts
Highmark Health1,819−980.2%−0.02 pts
Missouri Healthcare Advisors, LLC780−7under 0.1%−0.00 pts
UMWA Health and Retirement Funds312−16under 0.1%−0.00 pts
Ascension Health Alliance254+4under 0.1%−0.00 pts
Mitchell Family Office244−197under 0.1%−0.03 pts
BrightSpring Health Services, Inc.229+49under 0.1%+0.01 pts
California Physicians' Service31+9under 0.1%+0.00 pts

Change and share change are since October 2025. Shares are of reported enrollment in the CMS State/County/Contract file.

Counties

CountyMA enrolleesPenetrationLeading parent
Shelby County81,69048.5%Humana Inc. 29%
Davidson County59,30456.1%Health Care Service Corporation 32%
Knox County53,57453.6%Humana Inc. 54%
Hamilton County47,10056.6%BlueCross BlueShield of Tennessee 50%
Sullivan County31,08868.4%BlueCross BlueShield of Tennessee 41%
Rutherford County27,87351.3%BlueCross BlueShield of Tennessee 29%
Sumner County23,15853.6%Health Care Service Corporation 39%
Washington County21,16561.6%UnitedHealth Group, Inc. 48%
Blount County20,17556.2%Humana Inc. 52%
Williamson County19,30740.1%Health Care Service Corporation 32%
Wilson County16,90450.7%Health Care Service Corporation 38%
Bradley County15,19158.4%BlueCross BlueShield of Tennessee 40%
Montgomery County14,86843.8%UnitedHealth Group, Inc. 28%
Sevier County14,75358.6%Humana Inc. 49%
Cumberland County13,52253.1%BlueCross BlueShield of Tennessee 43%
Greene County13,05260.9%Humana Inc. 40%
Hawkins County12,57072.7%BlueCross BlueShield of Tennessee 49%
Maury County12,08048.4%UnitedHealth Group, Inc. 32%
Madison County10,75146.8%UnitedHealth Group, Inc. 33%
Anderson County10,69553.5%Humana Inc. 51%
Loudon County10,67051.9%Humana Inc. 51%
Carter County10,45666.5%UnitedHealth Group, Inc. 61%
Hamblen County9,67862.4%Humana Inc. 36%
Jefferson County9,38460.6%Humana Inc. 46%
Robertson County9,23657.9%Health Care Service Corporation 32%
Putnam County9,00347.9%BlueCross BlueShield of Tennessee 40%
Roane County8,97756.5%Humana Inc. 50%
Monroe County8,49759.3%UnitedHealth Group, Inc. 38%
McMinn County8,26156.1%UnitedHealth Group, Inc. 35%
Cocke County7,53967.2%UnitedHealth Group, Inc. 46%
Coffee County7,13549.7%BlueCross BlueShield of Tennessee 31%
Campbell County7,09668.1%Humana Inc. 42%
Dickson County6,99854.8%BlueCross BlueShield of Tennessee 36%
Claiborne County6,29468.1%UnitedHealth Group, Inc. 43%
Tipton County5,59343.1%BlueCross BlueShield of Tennessee 28%
Gibson County5,58446.0%UnitedHealth Group, Inc. 36%
Franklin County5,53546.9%BlueCross BlueShield of Tennessee 37%
Cheatham County5,43556.0%Health Care Service Corporation 32%
Bedford County5,42452.1%UnitedHealth Group, Inc. 36%
Warren County5,33651.2%UnitedHealth Group, Inc. 33%
Rhea County5,08258.6%BlueCross BlueShield of Tennessee 37%
Lincoln County5,07653.3%BlueCross BlueShield of Tennessee 55%
Lawrence County4,84244.1%BlueCross BlueShield of Tennessee 32%
Grainger County4,75869.0%Humana Inc. 44%
Fayette County4,68737.0%Humana Inc. 30%
Marion County4,59055.5%BlueCross BlueShield of Tennessee 46%
Henry County4,39045.1%BlueCross BlueShield of Tennessee 40%
Marshall County4,22353.2%UnitedHealth Group, Inc. 28%
White County4,13251.9%UnitedHealth Group, Inc. 36%
Dyer County4,07547.9%BlueCross BlueShield of Tennessee 43%
Henderson County3,83858.5%BlueCross BlueShield of Tennessee 53%
Obion County3,75647.6%Highmark Health 28%
Unicoi County3,69267.8%UnitedHealth Group, Inc. 64%
Giles County3,59745.4%BlueCross BlueShield of Tennessee 31%
Johnson County3,58765.2%UnitedHealth Group, Inc. 64%
Scott County3,54565.0%UnitedHealth Group, Inc. 59%
Hardeman County3,46556.5%UnitedHealth Group, Inc. 33%
Union County3,44164.0%Humana Inc. 56%
Carroll County3,37443.6%BlueCross BlueShield of Tennessee 40%
Hickman County3,32058.5%BlueCross BlueShield of Tennessee 32%
Morgan County3,28160.4%Humana Inc. 47%
Hardin County3,20640.4%UnitedHealth Group, Inc. 34%
Weakley County3,20642.4%BlueCross BlueShield of Tennessee 31%
McNairy County3,17744.9%BlueCross BlueShield of Tennessee 36%
Sequatchie County3,14259.8%BlueCross BlueShield of Tennessee 42%
DeKalb County3,10761.7%Health Care Service Corporation 33%
Fentress County3,06648.1%UnitedHealth Group, Inc. 37%
Lauderdale County3,03955.9%UnitedHealth Group, Inc. 34%
Overton County3,03147.7%BlueCross BlueShield of Tennessee 37%
Polk County2,99664.7%BlueCross BlueShield of Tennessee 36%
Macon County2,83650.9%BlueCross BlueShield of Tennessee 34%
Grundy County2,60363.4%BlueCross BlueShield of Tennessee 43%
Haywood County2,47655.6%UnitedHealth Group, Inc. 39%
Benton County2,45849.9%BlueCross BlueShield of Tennessee 36%
Meigs County2,42266.4%UnitedHealth Group, Inc. 36%
Smith County2,25047.1%UnitedHealth Group, Inc. 27%
Bledsoe County2,16158.6%BlueCross BlueShield of Tennessee 52%
Humphreys County2,14443.9%BlueCross BlueShield of Tennessee 32%
Wayne County1,99948.7%BlueCross BlueShield of Tennessee 47%
Cannon County1,89851.8%BlueCross BlueShield of Tennessee 34%
Chester County1,85345.1%BlueCross BlueShield of Tennessee 38%
Decatur County1,77947.3%BlueCross BlueShield of Tennessee 42%
Lewis County1,67153.2%UnitedHealth Group, Inc. 33%
Jackson County1,65148.1%BlueCross BlueShield of Tennessee 36%
Stewart County1,54941.0%UnitedHealth Group, Inc. 30%
Crockett County1,47743.5%UnitedHealth Group, Inc. 36%
Perry County1,26256.6%BlueCross BlueShield of Tennessee 43%
Hancock County1,26185.2%UnitedHealth Group, Inc. 48%
Trousdale County1,06751.1%Health Care Service Corporation 33%
Houston County1,06351.3%UnitedHealth Group, Inc. 31%
Clay County1,04345.9%UnitedHealth Group, Inc. 38%
Van Buren County92748.2%UnitedHealth Group, Inc. 36%
Pickett County71841.5%UnitedHealth Group, Inc. 38%
Lake County69953.7%UnitedHealth Group, Inc. 38%
Moore County64940.3%BlueCross BlueShield of Tennessee 37%