Free tool · public CMS data
Maryland Medicare Advantage market share
In September 2026, 294,173 Maryland Medicare beneficiaries were enrolled in a Medicare Advantage plan across 87 parent carriers and 24 counties, led by Kaiser Foundation Health Plan, Inc. with 25.7% of counted enrollment.
Data month
September 2026
Advantage enrollees
294,173
+0.2% vs September 2025
Parent carriers
87
Advantage penetration
24.0%
CMS Medicare Monthly Enrollment, 2024
Carriers in Maryland
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | Kaiser Foundation Health Plan, Inc. | 75,533 | 25.7% | 17 | +4.4% |
| 2 | CareFirst, Inc. | 52,312 | 17.8% | 24 | +85.8% |
| 3 | Humana Inc. | 49,709 | 16.9% | 24 | +54.5% |
| 4 | UnitedHealth Group, Inc. | 42,009 | 14.3% | 24 | -47.5% |
| 5 | CVS Health Corporation | 33,539 | 11.4% | 24 | -25.5% |
| 6 | Johns Hopkins Healthcare LLC | 14,334 | 4.9% | 24 | +11.8% |
| 7 | LifeBridge Health, Inc. | 13,911 | 4.7% | 23 | +46.8% |
| 8 | Health Care Service Corporation | 10,190 | 3.5% | 24 | -1.4% |
| 9 | Elevance Health, Inc. | 1,212 | 0.4% | 24 | -6.6% |
| 10 | ISNP Holdings, LLC | 524 | 0.2% | 8 | +8.9% |
| 11 | Highmark Health | 339 | 0.1% | 24 | -12.4% |
| 12 | SNP Holdings, LLC | 332 | 0.1% | 11 | -37.6% |
| 13 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 229 | 0.1% | 24 | -0.4% |
| 14 | Alameda Alliance for Health | 0 | 0.0% | 1 | — |
| 15 | Alignment Healthcare USA, LLC | 0 | 0.0% | 24 | — |
| 16 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 24 | — |
| 17 | Astiva Health Holdings Incorporated | 0 | 0.0% | 1 | — |
| 18 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 3 | — |
| 19 | ATRIO Health Plans | 0 | 0.0% | 1 | — |
| 20 | Aultman Health Foundation | 0 | 0.0% | 24 | — |
| 21 | Aware Integrated, Inc. | 0 | 0.0% | 24 | — |
| 22 | BayCare Health System, Inc. | 0 | 0.0% | 1 | — |
| 23 | Baystate Health, Inc. | 0 | 0.0% | 24 | — |
| 24 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 24 | — |
| 25 | Blue Cross and Blue Shield of Massachusetts, Inc. | 0 | 0.0% | 24 | — |
| 26 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 24 | — |
| 27 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 24 | — |
| 28 | BlueCross BlueShield of Alabama | 0 | 0.0% | 24 | — |
| 29 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 24 | — |
| 30 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 24 | — |
| 31 | California Physicians' Service | 0 | 0.0% | 24 | — |
| 32 | Cambia Health Solutions, Inc. | 0 | 0.0% | 24 | — |
| 33 | CAPITAL BLUE CROSS | 0 | 0.0% | 24 | — |
| 34 | CareSource | 0 | 0.0% | 5 | — |
| 35 | Centene Corporation | 0 | 0.0% | 14 | — |
| 36 | Clover Health Holdings, Inc. | 0 | 0.0% | 3 | — |
| 37 | Corewell Health | 0 | 0.0% | 24 | — |
| 38 | CuraCor Solutions Corp. | 0 | 0.0% | 24 | — |
| 39 | Devoted Health, Inc. | 0 | 0.0% | 6 | — |
| 40 | Elderplan, Inc. | 0 | 0.0% | 4 | — |
| 41 | EmblemHealth, Inc. | 0 | 0.0% | 24 | — |
| 42 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 24 | — |
| 43 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 24 | — |
| 44 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 24 | — |
| 45 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 24 | — |
| 46 | Hamaspik of Rockland County, Inc. | 0 | 0.0% | 1 | — |
| 47 | Hawaii Medical Service Association | 0 | 0.0% | 24 | — |
| 48 | Healthfirst, Inc. | 0 | 0.0% | 24 | — |
| 49 | HealthPartners, Inc. | 0 | 0.0% | 24 | — |
| 50 | Henry Ford Health System | 0 | 0.0% | 24 | — |
| 51 | Horizon Mutual Holdings, Inc | 0 | 0.0% | 24 | — |
| 52 | Independence Health Group, Inc. | 0 | 0.0% | 24 | — |
| 53 | Independent Health Association, Inc. | 0 | 0.0% | 24 | — |
| 54 | Lifetime Healthcare, Inc. | 0 | 0.0% | 24 | — |
| 55 | LMC Family Holdings, LLC | 0 | 0.0% | 1 | — |
| 56 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 24 | — |
| 57 | Martin's Point Health Care, Inc. | 0 | 0.0% | 24 | — |
| 58 | Mass General Brigham Incorporated | 0 | 0.0% | 2 | — |
| 59 | McLaren Health Care Corporation | 0 | 0.0% | 1 | — |
| 60 | Medica Holding Company | 0 | 0.0% | 24 | — |
| 61 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 24 | — |
| 62 | Memorial Hermann Health System | 0 | 0.0% | 1 | — |
| 63 | Mercy Care | 0 | 0.0% | 1 | — |
| 64 | MHH Healthcare, L.P. | 0 | 0.0% | 2 | — |
| 65 | Missouri Healthcare Advisors, LLC | 0 | 0.0% | 1 | — |
| 66 | Molina Healthcare, Inc. | 0 | 0.0% | 2 | — |
| 67 | MVP Health Care, Inc. | 0 | 0.0% | 24 | — |
| 68 | NEIGHBORHOOD HEALTH PLAN OF RHODE ISLAND | 0 | 0.0% | 1 | — |
| 69 | Network Health, Inc. | 0 | 0.0% | 24 | — |
| 70 | Point32Health, Inc. | 0 | 0.0% | 2 | — |
| 71 | Presbyterian Healthcare Services | 0 | 0.0% | 2 | — |
| 72 | Providence St Joseph Health | 0 | 0.0% | 1 | — |
| 73 | Rifkin Managed Care Holding, LLC | 0 | 0.0% | 18 | -100.0% |
| 74 | Risant Health, Inc. | 0 | 0.0% | 7 | — |
| 75 | SANTA CLARA COUNTY HEALTH AUTHORITY | 0 | 0.0% | 2 | — |
| 76 | SCAN Group | 0 | 0.0% | 7 | — |
| 77 | Sentara Health Care (SHC) | 0 | 0.0% | 4 | — |
| 78 | Sharp Healthcare | 0 | 0.0% | 1 | — |
| 79 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 24 | — |
| 80 | The Regents of the University of California | 0 | 0.0% | 2 | — |
| 81 | Thomas Jefferson University | 0 | 0.0% | 6 | — |
| 82 | Triton Health Systems, L.L.C. | 0 | 0.0% | 1 | — |
| 83 | UPMC Health System | 0 | 0.0% | 24 | — |
| 84 | USAble Mutual Insurance Company | 0 | 0.0% | 24 | — |
| 85 | Visiting Nurse Service of New York | 0 | 0.0% | 1 | — |
| 86 | West Virginia United Health System, Inc. | 0 | 0.0% | 1 | — |
| 87 | Zing Health Consolidator, Inc | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each Maryland county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| Prince George's | 48,398 | Kaiser Foundation Health Plan, Inc. | 49.3% | 63 | 30.7% |
| Baltimore | 45,257 | Kaiser Foundation Health Plan, Inc. | 19.9% | 61 | 25.4% |
| Montgomery | 44,445 | Kaiser Foundation Health Plan, Inc. | 49.9% | 66 | 22.2% |
| Baltimore City | 37,457 | Kaiser Foundation Health Plan, Inc. | 18.4% | 61 | 36.3% |
| Anne Arundel | 21,901 | Kaiser Foundation Health Plan, Inc. | 20.3% | 60 | 19.6% |
| Harford | 14,138 | UnitedHealth Group, Inc. | 35.7% | 56 | 24.0% |
| Howard | 11,276 | CareFirst, Inc. | 23.9% | 56 | 19.6% |
| Frederick | 10,702 | Humana Inc. | 27.4% | 58 | 19.1% |
| Washington | 8,170 | Humana Inc. | 50.5% | 54 | 23.1% |
| Carroll | 7,773 | CareFirst, Inc. | 25.8% | 57 | 19.3% |
| Charles | 7,352 | Humana Inc. | 27.6% | 54 | 21.3% |
| Wicomico | 5,914 | Humana Inc. | 33.8% | 52 | 24.1% |
| Cecil | 4,720 | UnitedHealth Group, Inc. | 27.0% | 50 | 20.1% |
| Worcester | 4,281 | CareFirst, Inc. | 32.4% | 54 | 23.0% |
| Calvert | 3,447 | CareFirst, Inc. | 38.7% | 51 | 13.9% |
| St. Mary's | 3,373 | Humana Inc. | 39.0% | 52 | 13.7% |
| Allegany | 3,153 | Humana Inc. | 64.6% | 51 | 14.9% |
| Dorchester | 2,308 | CareFirst, Inc. | 36.4% | 53 | 22.7% |
| Queen Anne's | 2,279 | CareFirst, Inc. | 32.8% | 52 | 15.8% |
| Talbot | 1,826 | CareFirst, Inc. | 34.3% | 53 | 14.5% |
| Caroline | 1,741 | CareFirst, Inc. | 37.3% | 51 | 20.5% |
| Garrett | 1,667 | Humana Inc. | 61.1% | 50 | 21.1% |
| Somerset | 1,578 | Humana Inc. | 34.8% | 51 | 26.4% |
| Kent | 1,017 | Humana Inc. | 29.5% | 53 | 16.0% |
What is missing
CMS suppresses any plan-county cell with fewer than 11 enrollees. Those enrollees are missing from these counts, so every figure is a floor, not an exact total.
What is counted
Counts cover Medicare Advantage contracts only (Local CCP, Regional CCP, PFFS and MSA). Standalone Part D drug plans, cost plans, HCPP and PACE contracts are excluded.
Source: CMS Monthly Enrollment by Contract/Plan/State/County (CPSC).