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MA Enrollment Explorer / States / Mississippi

Medicare Advantage in Mississippi: enrollment, penetration and market share

299,586 people in Mississippi were enrolled in Medicare Advantage in October 2026. 45.2% of the state's 663,373 eligible Medicare beneficiaries are in Medicare Advantage, +0.7 pts since October 2025. Humana Inc. is the largest parent organization with 43% of reported enrollment; 14 parent organizations have 11 or more members, and the market's HHI is 2,783 (highly concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in Mississippi changed by +5,445 (+1.9%).

45.2%MA penetration, October 2026
300KMA enrollees
14parent organizations (11+ members)
2,783HHI, highly concentrated
Open Mississippi on the market mapMSSP ACOs in Mississippi

Parent organizations in Mississippi

Parent organizationMembersChangeShareShare change
Humana Inc.128,055+11,42843.1%+2.5 pts
UnitedHealth Group, Inc.76,670−2,43825.8%−1.7 pts
CVS Health Corporation37,684−2,72312.7%−1.4 pts
Centene Corporation23,394+1,2247.9%+0.2 pts
Health Care Service Corporation14,476−614.9%−0.2 pts
Devoted Health, Inc.9,564+7,5433.2%+2.5 pts
BlueCross BlueShield of Alabama4,553−4801.5%−0.2 pts
Elevance Health, Inc.1,230+150.4%−0.01 pts
Mitchell Family Office708+800.2%+0.02 pts
Zing Health Consolidator, Inc339+1050.1%+0.03 pts
Singh Holdings LLC270+219under 0.1%+0.1 pts
Blue Cross Blue Shield of Michigan Mutual Ins. Co.131−9under 0.1%−0.00 pts
Louisiana Health Service & Indemnity Company39−220under 0.1%−0.1 pts
BlueCross BlueShield of Tennessee28−4,728under 0.1%−1.6 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
Hinds County25,24554.7%Humana Inc. 40%
Harrison County23,75450.2%Humana Inc. 58%
Jackson County16,46550.3%Humana Inc. 50%
DeSoto County12,85538.2%Humana Inc. 50%
Rankin County11,07734.7%Humana Inc. 40%
Forrest County8,01852.1%Humana Inc. 50%
Pearl River County7,98852.5%Humana Inc. 70%
Madison County7,79733.0%Humana Inc. 40%
Jones County7,13747.3%Humana Inc. 49%
Lee County6,87336.2%CVS Health Corporation 67%
Lauderdale County6,84942.8%Humana Inc. 46%
Hancock County6,79458.6%Humana Inc. 59%
Washington County5,87454.1%UnitedHealth Group, Inc. 52%
Pike County5,19255.9%Humana Inc. 70%
Lowndes County4,94638.6%CVS Health Corporation 86%
Lamar County4,64841.7%Humana Inc. 54%
Warren County4,61644.0%UnitedHealth Group, Inc. 40%
Marshall County4,59352.4%Humana Inc. 36%
Panola County4,00849.8%Humana Inc. 59%
Bolivar County3,81151.6%Humana Inc. 46%
Monroe County3,66941.0%CVS Health Corporation 59%
Copiah County3,61955.1%Humana Inc. 46%
Adams County3,38943.9%Humana Inc. 80%
Marion County3,23652.2%Humana Inc. 62%
Leflore County3,17652.5%Humana Inc. 52%
Lincoln County3,05637.4%UnitedHealth Group, Inc. 51%
Scott County3,02953.5%Humana Inc. 46%
George County2,98157.5%Humana Inc. 50%
Sunflower County2,93157.1%Humana Inc. 54%
Tate County2,86844.1%Humana Inc. 57%
Simpson County2,70143.6%UnitedHealth Group, Inc. 47%
Coahoma County2,69752.9%UnitedHealth Group, Inc. 47%
Holmes County2,65963.0%UnitedHealth Group, Inc. 43%
Yazoo County2,65250.5%UnitedHealth Group, Inc. 36%
Covington County2,63557.6%Humana Inc. 48%
Oktibbeha County2,54332.1%CVS Health Corporation 60%
Pontotoc County2,46136.0%CVS Health Corporation 66%
Stone County2,45755.7%Humana Inc. 59%
Wayne County2,41250.4%Humana Inc. 55%
Jasper County2,39555.7%Humana Inc. 57%
Clay County2,34947.9%CVS Health Corporation 72%
Neshoba County2,34038.7%UnitedHealth Group, Inc. 51%
Union County2,24232.6%CVS Health Corporation 52%
Leake County2,23348.1%Humana Inc. 42%
Chickasaw County2,21051.7%CVS Health Corporation 69%
Grenada County2,16638.7%UnitedHealth Group, Inc. 44%
Attala County2,16248.4%Humana Inc. 51%
Alcorn County2,14523.3%UnitedHealth Group, Inc. 46%
Lafayette County2,11922.2%Humana Inc. 48%
Clarke County1,98847.7%Humana Inc. 44%
Winston County1,93039.8%Humana Inc. 55%
Newton County1,91238.9%UnitedHealth Group, Inc. 62%
Prentiss County1,85033.1%CVS Health Corporation 61%
Tippah County1,83134.9%CVS Health Corporation 40%
Itawamba County1,78331.6%CVS Health Corporation 61%
Walthall County1,73548.4%Humana Inc. 66%
Yalobusha County1,70040.2%Humana Inc. 53%
Jefferson Davis County1,67758.5%Humana Inc. 50%
Perry County1,57051.5%Humana Inc. 47%
Lawrence County1,52544.4%UnitedHealth Group, Inc. 41%
Amite County1,47841.1%Humana Inc. 45%
Tallahatchie County1,47651.5%Humana Inc. 50%
Noxubee County1,41052.8%UnitedHealth Group, Inc. 51%
Tishomingo County1,40626.7%CVS Health Corporation 44%
Calhoun County1,39538.0%CVS Health Corporation 46%
Smith County1,34634.5%UnitedHealth Group, Inc. 45%
Greene County1,30248.3%Humana Inc. 55%
Claiborne County1,24760.8%UnitedHealth Group, Inc. 45%
Tunica County1,24162.1%Humana Inc. 52%
Webster County1,16740.4%CVS Health Corporation 60%
Montgomery County1,16142.1%UnitedHealth Group, Inc. 49%
Humphreys County1,15359.3%Humana Inc. 55%
Kemper County1,13050.7%UnitedHealth Group, Inc. 46%
Wilkinson County1,12955.2%Humana Inc. 81%
Jefferson County1,04757.4%Humana Inc. 49%
Benton County94545.0%Humana Inc. 41%
Quitman County94557.4%Humana Inc. 53%
Carroll County90631.8%UnitedHealth Group, Inc. 57%
Franklin County76536.7%Humana Inc. 58%
Choctaw County71640.5%UnitedHealth Group, Inc. 36%
Sharkey County56850.2%UnitedHealth Group, Inc. 49%
Issaquena County8053.0%Humana Inc. 66%