Maine Medicare Advantage market share
In September 2026, 228,921 Maine Medicare beneficiaries were enrolled in a Medicare Advantage plan across 71 parent carriers and 16 counties, led by Martin's Point Health Care, Inc. with 28.9% of counted enrollment.
Data month
September 2026
Advantage enrollees
228,921
+1.5% vs September 2025
Parent carriers
71
Advantage penetration
57.3%
CMS Medicare Monthly Enrollment, 2024
Carriers in Maine
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | Martin's Point Health Care, Inc. | 66,121 | 28.9% | 16 | -7.9% |
| 2 | UnitedHealth Group, Inc. | 52,262 | 22.8% | 16 | +5.8% |
| 3 | CVS Health Corporation | 37,057 | 16.2% | 16 | +1.9% |
| 4 | Elevance Health, Inc. | 26,352 | 11.5% | 16 | -12.8% |
| 5 | Humana Inc. | 25,817 | 11.3% | 16 | +58.1% |
| 6 | Centene Corporation | 20,902 | 9.1% | 16 | -0.3% |
| 7 | Health Care Service Corporation | 297 | 0.1% | 16 | +25.8% |
| 8 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 42 | 0.0% | 16 | -67.4% |
| 9 | Blue Cross and Blue Shield of Massachusetts, Inc. | 29 | 0.0% | 16 | +141.7% |
| 10 | Highmark Health | 26 | 0.0% | 16 | +4.0% |
| 11 | California Physicians' Service | 16 | 0.0% | 16 | +23.1% |
| 12 | Alignment Healthcare USA, LLC | 0 | 0.0% | 16 | — |
| 13 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 16 | — |
| 14 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 1 | — |
| 15 | Aultman Health Foundation | 0 | 0.0% | 16 | — |
| 16 | Aware Integrated, Inc. | 0 | 0.0% | 16 | — |
| 17 | BayCare Health System, Inc. | 0 | 0.0% | 2 | — |
| 18 | Baystate Health, Inc. | 0 | 0.0% | 16 | — |
| 19 | Blue Cross & Blue Shield of Rhode Island | 0 | 0.0% | 16 | — |
| 20 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 16 | — |
| 21 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 16 | — |
| 22 | BlueCross BlueShield of Alabama | 0 | 0.0% | 16 | — |
| 23 | BlueCross BlueShield of South Carolina (BCBSSC) | 0 | 0.0% | 16 | — |
| 24 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 16 | — |
| 25 | BMC Health System, Inc. | 0 | 0.0% | 1 | — |
| 26 | Cambia Health Solutions, Inc. | 0 | 0.0% | 16 | — |
| 27 | CAPITAL BLUE CROSS | 0 | 0.0% | 16 | — |
| 28 | CareFirst, Inc. | 0 | 0.0% | 16 | — |
| 29 | CareSource | 0 | 0.0% | 5 | — |
| 30 | Corewell Health | 0 | 0.0% | 16 | — |
| 31 | CuraCor Solutions Corp. | 0 | 0.0% | 16 | — |
| 32 | Devoted Health, Inc. | 0 | 0.0% | 3 | — |
| 33 | Elderplan, Inc. | 0 | 0.0% | 1 | — |
| 34 | EmblemHealth, Inc. | 0 | 0.0% | 16 | — |
| 35 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 16 | — |
| 36 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 16 | — |
| 37 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 16 | — |
| 38 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 16 | — |
| 39 | Hawaii Medical Service Association | 0 | 0.0% | 16 | — |
| 40 | Health First Shared Services, Inc. | 0 | 0.0% | 1 | — |
| 41 | Healthfirst, Inc. | 0 | 0.0% | 16 | — |
| 42 | HealthPartners, Inc. | 0 | 0.0% | 16 | — |
| 43 | Henry Ford Health System | 0 | 0.0% | 16 | — |
| 44 | Horizon Mutual Holdings, Inc | 0 | 0.0% | 16 | — |
| 45 | Imperial Health Plan of California | 0 | 0.0% | 1 | — |
| 46 | Independence Health Group, Inc. | 0 | 0.0% | 16 | — |
| 47 | Independent Health Association, Inc. | 0 | 0.0% | 16 | — |
| 48 | Intermountain Health Care, Inc. | 0 | 0.0% | 1 | — |
| 49 | Johns Hopkins Healthcare LLC | 0 | 0.0% | 1 | — |
| 50 | Kaiser Foundation Health Plan, Inc. | 0 | 0.0% | 4 | — |
| 51 | Lifetime Healthcare, Inc. | 0 | 0.0% | 16 | — |
| 52 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 16 | — |
| 53 | Mass General Brigham Incorporated | 0 | 0.0% | 5 | — |
| 54 | Medica Holding Company | 0 | 0.0% | 16 | — |
| 55 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 16 | — |
| 56 | Memorial Hermann Health System | 0 | 0.0% | 1 | — |
| 57 | Molina Healthcare, Inc. | 0 | 0.0% | 3 | — |
| 58 | MVP Health Care, Inc. | 0 | 0.0% | 16 | — |
| 59 | NEIGHBORHOOD HEALTH PLAN OF RHODE ISLAND | 0 | 0.0% | 2 | — |
| 60 | Network Health, Inc. | 0 | 0.0% | 16 | — |
| 61 | PacificSource | 0 | 0.0% | 1 | — |
| 62 | Point32Health, Inc. | 0 | 0.0% | 5 | — |
| 63 | Presbyterian Healthcare Services | 0 | 0.0% | 1 | — |
| 64 | SCAN Group | 0 | 0.0% | 2 | — |
| 65 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 16 | — |
| 66 | Thomas Jefferson University | 0 | 0.0% | 1 | — |
| 67 | Trinity Health Corporation | 0 | 0.0% | 1 | — |
| 68 | Triton Health Systems, L.L.C. | 0 | 0.0% | 1 | — |
| 69 | UPMC Health System | 0 | 0.0% | 16 | — |
| 70 | USAble Mutual Insurance Company | 0 | 0.0% | 16 | — |
| 71 | VISITING NURSE ASSOCIATION OF CENTRAL NEW YORK | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each Maine county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| Cumberland | 47,143 | Martin's Point Health Care, Inc. | 39.0% | 57 | 60.0% |
| York | 32,748 | Martin's Point Health Care, Inc. | 25.8% | 55 | 52.4% |
| Penobscot | 23,979 | UnitedHealth Group, Inc. | 26.6% | 54 | 56.4% |
| Kennebec | 22,610 | UnitedHealth Group, Inc. | 24.9% | 50 | 62.0% |
| Androscoggin | 18,033 | Martin's Point Health Care, Inc. | 35.7% | 50 | 64.7% |
| Aroostook | 11,295 | Centene Corporation | 42.4% | 51 | 50.9% |
| Oxford | 11,202 | UnitedHealth Group, Inc. | 31.6% | 51 | 60.3% |
| Somerset | 9,439 | Elevance Health, Inc. | 30.2% | 48 | 59.5% |
| Hancock | 9,085 | Martin's Point Health Care, Inc. | 40.1% | 50 | 51.1% |
| Knox | 7,501 | UnitedHealth Group, Inc. | 29.4% | 49 | 55.1% |
| Waldo | 7,442 | Martin's Point Health Care, Inc. | 28.8% | 48 | 57.3% |
| Lincoln | 7,414 | Martin's Point Health Care, Inc. | 30.4% | 52 | 58.6% |
| Sagadahoc | 6,653 | Martin's Point Health Care, Inc. | 36.5% | 49 | 57.6% |
| Franklin | 6,108 | Humana Inc. | 25.2% | 49 | 66.5% |
| Washington | 4,836 | UnitedHealth Group, Inc. | 29.9% | 51 | 44.8% |
| Piscataquis | 3,433 | UnitedHealth Group, Inc. | 28.6% | 49 | 55.4% |
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).