Table 4.

Transitions into Medicare Advantage in Miami-Dade County, 2004–2008

	2004		2005		2006		2007		2008
	N	percent	N	percent	N	percent	N	percent	N	percent
Incident Cohort
Enroll in MA	4,778	42%	4,329	38%	4,271	38%	4,197	38%	4,121	36%
Enroll in TM	6,650	58%	6,922	62%	6,840	62%	6,786	62%	7,452	64%
Non-Incident Cohort (TM in previous year)
Switch to MA	3,408	5%	3,220	5%	4,053	6%	4,700	7%	3,576	5%
Stay in TM	61,201	95%	61,900	95%	61,683	94%	61,038	93%	62,028	95%
Among New MA enrollees
Age 65	4,778	58%	4,329	57%	4,271	51%	4,197	47%	4,121	54%
Age 66+	3,408	42%	3,220	43%	4,053	49%	4,700	53%	3,576	46%
Percentage of all MA enrollees who enrolled in their incident cohort year*		35%		37%		39%		42%		44%

Source: Statistical analysis of Medicare enrollment files, 2003–2008, data from July of each year. Does not include beneficiaries who died during the year.

Sample includes Medicare beneficiaries age 65+, who gained eligibility for Medicare because of old age, and not dual eligible

^*incident = joined MA within 12 mos of Medicare eligibility