This article uses the 2006 to 2012 Medicare Current Beneficiary Survey, to examine disease-specific switching rates between TM and MA and disease-specific ratios of mean baseline total Medicare expenditures of beneficiaries remaining in the same plan (stayers) vs those switching to another plan (switchers), respectively. We focused on beneficiaries with 1 or more of 10 incident diagnoses. Beneficiaries with a new diagnosis of Alzheimer disease and related dementias, hypertension, and psychiatric disorders had relatively high rates of switching into MA plans and low rates of switching out of MA plans. Among those with new diagnoses of psychiatric disorders and diabetes, more costly beneficiaries (those with higher costs) switched into MA plans. For cancer, more costly beneficiaries remained in MA plans.
Park S, Fishman P, White L, Larson EB, Coe NB: Disease-Specific Plan Switching Between Traditional Medicare and Medicare Advantage. Kaiser Permanente Journal 24, Nov 2019.