Frequencies for first 10,000 rows of organizationname variable in ma2012 dataset : Organization Name | Freq. Percent Cum. ----------------------------------------+----------------------------------- | 6 0.06 0.06 ARKANSAS BLUE CROSS AND BLUE SHIELD | 669 6.69 6.75 Abrazo Advantage Health Plan | 46 0.46 7.21 Advantage by Bridgeway Health Solutio.. | 2 0.02 7.23 Aetna Medicare | 43 0.43 7.66 Arcadian Health Plan | 30 0.30 7.96 Arkansas Community Care/ Texarkana Co.. | 12 0.12 8.08 Banner MediSun | 6 0.06 8.14 Blue Advantage (PPO) | 360 3.60 11.74 Blue Cross Blue Shield of Arizona Adv.. | 38 0.38 12.12 Blue Cross and Blue Shield of Alabama | 270 2.70 14.82 Blue Cross and Blue Shield of Arizona | 5 0.05 14.87 BlueRx | 2 0.02 14.89 BlueRx (PDP) | 4 0.04 14.93 Bridgeway Health Solutions | 1 0.01 14.94 CIGNA HealthCare of Arizona | 4 0.04 14.98 COVENTRY HEALTH CARE | 50 0.50 15.48 Care Improvement Plus | 1,454 14.54 30.02 Care1st+ | 2 0.02 30.04 CareMore Health Plan of Arizona, Inc. | 59 0.59 30.63 Cigna | 10 0.10 30.73 Cigna HealthCare of Arizona | 18 0.18 30.91 Cigna Medicare Rx | 19 0.19 31.10 Cigna-HealthSpring | 282 2.82 33.92 Cigna-HealthSpring Rx | 12 0.12 34.04 Coventry Health Care | 71 0.71 34.75 Desert Canyon Community Care | 6 0.06 34.81 EnvisionRx Plus | 17 0.17 34.98 Express Scripts Medicare | 23 0.23 35.21 First Health Part D | 30 0.30 35.51 Health Advantage | 10 0.10 35.61 Health Choice Generations HMO SNP | 31 0.31 35.92 Health Net of Arizona, Inc. | 115 1.15 37.07 HealthMarkets Medicare | 8 0.08 37.15 HealthSpring Prescription Drug Plan | 4 0.04 37.19 Healthspring of Alabama, Inc. | 213 2.13 39.32 Humana Benefit Plan of Illinois, Inc. | 8 0.08 39.40 Humana Health Plan, Inc. | 538 5.38 44.78 Humana Insurance Company | 2,955 29.55 74.33 Magellan Complete Care of Arizona | 3 0.03 74.36 Maricopa Care Advantage | 2 0.02 74.38 Mercy Care Advantage | 21 0.21 74.59 Mercy LIFE of Alabama | 12 0.12 74.71 Mercy Maricopa Advantage | 2 0.02 74.73 ONECare by Care1st Health Plan Arizon.. | 3 0.03 74.76 Phoenix Health Plans | 33 0.33 75.09 SCAN Health Plan Arizona | 19 0.19 75.28 SilverScript | 17 0.17 75.45 Sterling Life Insurance Company | 18 0.18 75.63 Stonebridge Life Insurance Company | 16 0.16 75.79 Symphonix Health | 12 0.12 75.91 Total Life Healthcare | 36 0.36 76.27 Tribute Health Plan of Arkansas | 23 0.23 76.50 UNIVERSAL HEALTH CARE INSURANCE COMPA.. | 40 0.40 76.90 UniCare | 10 0.10 77.00 United American Insurance Company | 23 0.23 77.23 UnitedHealthcare | 340 3.40 80.63 UnitedHealthcare Community Plan | 52 0.52 81.15 Universal American Corp. | 209 2.09 83.24 Universal Health Care Insurance Compa.. | 15 0.15 83.39 University Care Advantage | 15 0.15 83.54 VIVA Medicare | 308 3.08 86.62 VIVA Medicare Plus | 189 1.89 88.51 WellCare | 184 1.84 90.35 Windsor Medicare Extra | 961 9.61 99.96 Windsor Rx | 4 0.04 100.00 ----------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 14 Apr 2016