Table 5. Number of plans and number and percent of Medicare enrollees in the 5 health maintenance organization (HMO) chains that had the most Tax Equity and Fiscal Responsibility Act (TEFRA) of 1982 risk enrollees: December 1986.
| HMO chain and participating States | Number of plans | Number of enrollees | Percent of enrollees |
|---|---|---|---|
| Total, TEFRA risk | 149 | 813,712 | 100.0 |
| Risk, top 5 chains | 20 | 250,215 | 30.7 |
| United Health Plan | |||
| (Minnesota, Illinois, Iowa, Nebraska) | 4 | 65,428 | 8.0 |
| Family Health Plan, Inc. | |||
| (New Mexico, Arizona, California) | 3 | 65,319 | 8.0 |
| PacifiCare, Inc. | |||
| (California, Oregon) | 2 | 51,253 | 6.3 |
| Maxicare | |||
| (Pennsylvania, Florida, Illinois, Michigan, Indiana, California) | 8 | 35,809 | 4.4 |
| U.S. Health Care Systems of Pennsylvania | |||
| (New Jersey, Pennsylvania, Illinois) | 3 | 32,406 | 4.0 |
NOTE: All plans are headquartered in California except U.S. Health Care Systems of Pennsylvania.
SOURCE: Health Care Financing Administration: Data from the Office of Prepaid Health Care.