Table 1. Sample Characteristics by CMS Star Ratings.
| CMS Star Ratings | ||||||
|---|---|---|---|---|---|---|
| Total | Unrated | 2.5 or fewer | 3 to 3.5 | 4 to 4.5 | 5 | |
| Number of contract-years | 3,866 | 1,150 | 305 | 1,652 | 717 | 42 |
| Contract enrollment, mean (SE) | 22,883 (921) | 4,259 (639) | 16,222 (2,236) | 27,303 (1,151) | 39,343 (2,870) | 126,345 (39,841) |
| Total number of plans, mean (SE) | 6.60 (0.14) | 4.62 (0.01) | 7.36 (0.01) | 6.86 (0.00) | 8.55 (0.01) | 12.19 (0.02) |
| Proportion of plans in contract offering Part D, mean (SE) | 0.84 (0.00) | 0.86 (0.01) | 0.88 (0.01) | 0.84 (0.00) | 0.79 (0.01) | 0.73 (0.02) |
| Proportion of plans in contract that were SNPs, mean (SE) | 0.25 (0.01) | 0.31 (0.01) | 0.37 (0.02) | 0.24 (0.01) | 0.14 (0.01) | 0.04 (0.02) |
| Proportion of plans in contract that were EGHPs, mean (SE) | 0.25 (0.00) | 0.23 (0.01) | 0.18 (0.02) | 0.25 (0.01) | 0.31 (0.01) | 0.38 (0.04) |
| Contract maturitya, mean (SE) | 7.84 (0.11) | 2.66 (0.08) | 6.28 (0.20) | 9.39 (0.16) | 12.52 (0.28) | 20.17 (1.55) |
| Contract type, No (%) | ||||||
| HMO/HMO-POS | 2,579 (66.7) | 709 (61.7) | 227 (74.4) | 1,078 (65.3) | 523 (72.9) | 42 (100.0) |
| Local PPO | 1,008 (26.1) | 318 (27.7) | 50 (16.4) | 458 (27.7) | 182 (25.4) | 0 (0.0) |
| PFFS | 193 (5.0) | 113 (9.8) | 15 (4.9) | 56 (3.4) | 9 (1.3) | 0 (0.0) |
| Regional PPO | 86 (2.2) | 10 (0.9) | 13 (4.3) | 60 (3.6) | 3 (0.4) | 0 (0.0) |
CMS, Centers for Medicare and Medicaid Services; EGHP, employer group health plan; HMO, health maintenance organization; PFFS, private fee-for-service; POS, point of service; PPO, preferred provider organization; SE, standard error of mean; SNP, Special Needs Plan.
aMAPD plans first became available in 2006 when the Medicare Part D prescription drug program was implemented and Medicare Advantage plans started offering prescription drug benefits. However, the contract maturity reflects the maturity of the Medicare Advantage plan, which existed before 2006.