Frequencies for first 10,000 rows of organizationname variable in ma2018 dataset : Organization Name | Freq. Percent Cum. ----------------------------------------+----------------------------------- | 1 0.01 0.01 ARKANSAS BLUE CROSS AND BLUE SHIELD | 78 0.78 0.79 Aetna Medicare | 340 3.40 4.19 Alignment Health Plan | 19 0.19 4.38 Allwell | 74 0.74 5.12 Anthem Blue Cross | 41 0.41 5.53 Anthem Blue Cross Life and Health Ins.. | 1 0.01 5.54 Anthem Blue Cross and Blue Shield | 358 3.58 9.12 Arcadian Health Plan, Inc. | 151 1.51 10.63 Aspire Health Plan | 3 0.03 10.66 AvMed Medicare | 2 0.02 10.68 Blue Advantage (PPO) | 134 1.34 12.02 Blue Cross Blue Shield Healthcare Pla.. | 22 0.22 12.24 Blue Cross Blue Shield of Arizona Adv.. | 5 0.05 12.29 Blue Cross Blue Shield of IL, MT, NM | 14 0.14 12.43 Blue Cross and Blue Shield of IL, NM,.. | 8 0.08 12.51 Blue Cross and Blue Shield of Kansas .. | 6 0.06 12.57 Blue Cross of Idaho | 110 1.10 13.67 Blue Shield of California | 13 0.13 13.80 Brand New Day | 24 0.24 14.04 Bright Health | 26 0.26 14.30 CHA HMO, Inc. | 71 0.71 15.01 CLOVER HEALTH | 1 0.01 15.02 Capital Health Plan | 14 0.14 15.16 Care1st Health Plan | 15 0.15 15.31 CareMore Health Plan of Arizona, Inc. | 3 0.03 15.34 CarePlus Health Plans, Inc. | 30 0.30 15.64 Central Health Medicare Plan | 9 0.09 15.73 Chinese Community Health Plan | 2 0.02 15.75 Cigna | 3 0.03 15.78 Cigna-HealthSpring | 126 1.26 17.04 Community Care Alliance of Illinois, .. | 16 0.16 17.20 ConnectiCare, Inc. | 46 0.46 17.66 Coventry Health Care | 449 4.49 22.15 Denver Health Medical Plan, Inc. | 1 0.01 22.16 Easy Choice Health Plan | 8 0.08 22.24 Eon Health | 114 1.14 23.38 Essence Healthcare | 6 0.06 23.44 Essential Advantage | 1 0.01 23.45 Florida Blue | 84 0.84 24.29 Florida Blue HMO | 32 0.32 24.61 Florida Blue Preferred HMO | 8 0.08 24.69 Florida Health Care Plans | 15 0.15 24.84 Freedom Health, Inc. | 52 0.52 25.36 Friday Health Plans of Colorado | 48 0.48 25.84 Gateway Health Medicare Assured | 78 0.78 26.62 Golden State | 6 0.06 26.68 HEALTH NET COMMUNITY SOLUTIONS, INC. | 7 0.07 26.75 HMSA Akamai Advantage | 10 0.10 26.85 Health Advantage | 18 0.18 27.03 Health Alliance Medicare | 823 8.23 35.26 Health First Health Plans, Inc. | 13 0.13 35.39 Health Net of California | 36 0.36 35.75 HealthPartners UnityPoint Health | 60 0.60 36.35 HealthSpring of Florida, Inc. | 11 0.11 36.46 HealthSun Health Plans, Inc. | 4 0.04 36.50 Humana Benefit Plan of Illinois, Inc. | 128 1.28 37.78 Humana Employers Health Plan of Georg.. | 44 0.44 38.22 Humana Health Plan, Inc. | 80 0.80 39.02 Humana Insurance Company | 3,181 31.81 70.83 Humana Medical Plan, Inc. | 74 0.74 71.57 Humana WI Health Organization Insuran.. | 11 0.11 71.68 Imperial Health Plan of California, I.. | 4 0.04 71.72 Indiana University Health Plans - Med.. | 103 1.03 72.75 Inter Valley Health Plan | 8 0.08 72.83 Kaiser Permanente | 119 1.19 74.02 Medical Associates Health Plan, Inc. | 23 0.23 74.25 MeridianCare | 29 0.29 74.54 Molina Healthcare of Utah | 4 0.04 74.58 Optimum HealthCare, Inc. | 23 0.23 74.81 PacificSource Medicare | 51 0.51 75.32 QualChoice Advantage | 5 0.05 75.37 Regence BlueShield Of Idaho | 27 0.27 75.64 Regence BlueShield of Idaho | 4 0.04 75.68 RiverLink Health | 3 0.03 75.71 Rocky Mountain Health Plans | 263 2.63 78.34 SCAN Health Plan | 21 0.21 78.55 SelectHealth | 22 0.22 78.77 Senior Preferred | 20 0.20 78.97 Sharp Health Plan | 2 0.02 78.99 Simply Healthcare Plans, Inc. | 11 0.11 79.10 Stanford Health Care Advantage | 4 0.04 79.14 Sunrise Advantage Plan | 5 0.05 79.19 Superior Select Health Plans | 75 0.75 79.94 Ultimate Health Plans | 6 0.06 80.00 UnitedHealthcare | 1,442 14.42 94.42 VIVA Medicare | 87 0.87 95.29 WellCare | 471 4.71 100.00 ----------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org ,