Market Penetration

MA Penetration by State

Medicare Advantage's share of all Medicare-eligible beneficiaries, by state. Higher penetration means most Medicare beneficiaries have already chosen MA over traditional fee-for-service Medicare — i.e. less greenfield runway for further MA market expansion.

Enrollment: May 2026
State data: May 2026
Penetration: May 2026
Star Ratings: 2026
Generated: 2026-05-12 15:46 UTC
CMS source ↗

National Penetration

51.8%

35,620,066 of 68,815,227 eligibles

Highest Penetration

85.1%

Puerto Rico

Lowest Penetration

0.2%

Guam

States Tracked

incl. territories

State-by-State Penetration

State	Code	Eligibles	MA Enrolled	Penetration %	Counties
Puerto Rico	PR	798,277	679,232	85.1%	78
Michigan	MI	2,317,768	1,478,260	63.8%	83
Alabama	AL	1,141,640	702,957	61.6%	67
Rhode Island	RI	251,774	151,183	60.0%	5
Maine	ME	389,347	229,740	59.0%	16
North Carolina	NC	2,313,888	1,345,475	58.1%	100
Louisiana	LA	970,832	560,792	57.8%	64
Wisconsin	WI	1,369,273	788,431	57.6%	72
Florida	FL	5,319,349	3,058,594	57.5%	67
West Virginia	WV	456,982	259,693	56.8%	55
Ohio	OH	2,619,138	1,488,365	56.8%	88
Minnesota	MN	1,201,026	681,721	56.8%	87
Georgia	GA	2,022,701	1,139,387	56.3%	159
Kentucky	KY	1,008,322	560,400	55.6%	120
Utah	UT	487,805	269,429	55.2%	29
Texas	TX	4,995,029	2,748,915	55.0%	254
Missouri	MO	1,368,435	748,795	54.7%	115
Pennsylvania	PA	3,031,862	1,658,459	54.7%	67
Oregon	OR	969,339	525,116	54.2%	36
Tennessee	TN	1,524,485	820,050	53.8%	95
New York	NY	4,045,338	2,169,277	53.6%	62
Hawaii	HI	315,795	169,165	53.6%	5
Colorado	CO	1,084,682	568,113	52.4%	64
Nevada	NV	627,594	328,295	52.3%	17
Arizona	AZ	1,554,234	805,929	51.9%	15
California	CA	7,218,648	3,718,738	51.5%	58
Indiana	IN	1,420,982	726,896	51.2%	92
New Mexico	NM	475,987	241,804	50.8%	33
Washington	WA	1,577,785	787,446	49.9%	39
Arkansas	AR	691,778	327,202	47.3%	75
South Carolina	SC	1,280,815	599,829	46.8%	46
Idaho	ID	413,934	190,533	46.0%	44
Mississippi	MS	658,192	297,440	45.2%	82
Illinois	IL	2,482,318	1,094,268	44.1%	102
Oklahoma	OK	828,030	352,816	42.6%	77
New Jersey	NJ	1,836,585	761,999	41.5%	21
Virginia	VA	1,750,644	694,380	39.7%	133
Iowa	IA	707,081	267,500	37.8%	99
Massachusetts	MA	1,510,786	541,594	35.8%	14
North Dakota	ND	153,627	54,541	35.5%	53
South Dakota	SD	206,107	72,636	35.2%	66
Nebraska	NE	397,368	136,616	34.4%	93
Kansas	KS	608,072	204,266	33.6%	105
Delaware	DE	257,105	84,100	32.7%	3
New Hampshire	NH	359,330	111,569	31.0%	10
Montana	MT	271,552	80,832	29.8%	56
Maryland	MD	1,194,726	296,528	24.8%	24
Wyoming	WY	132,649	19,867	15.0%	23
Vermont	VT	170,006	20,786	12.2%	14
American Samoa	AS	4,896	62	1.3%	1
Guam	GU	21,309	45	0.2%	1

Penetration = MA enrolled ÷ total Medicare eligibles. Source: CMS Monthly MA State/County Penetration file.