Characteristics of Physician Organizations
| Characteristic | Total (N = 957) |
|---|---|
| IPA = independent practice association; MD = medical doctor; HMO = health maintenance organization. | |
| * As defined in the American Medical Association census (Havlicek PI. Medical Groups in the US, 1999. Chicago, Ill: American Medical Association; 1999). | |
| Organizational type, No. (%) | |
| Medical group | 621 (64.9) |
| IPA | 336 (35.1) |
| Ownership type, No. (%) | |
| Hospital/health plan | 376 (39.3) |
| MD | 456 (47.6) |
| Other | 125 (13.1) |
| Region,* No. (%) | |
| East North Central | 169 (17.7) |
| East South Central | 45 (4.7) |
| Middle Atlantic | 101 (10.6) |
| Mountain | 59 (6.2) |
| Northeast | 58 (6.1) |
| Pacific | 245 (25.6) |
| South Atlantic | 118 (12.3) |
| West North Central | 81 (8.4) |
| West South Central | 81 (8.4) |
| Practice location, No. (%) | |
| Urban/suburban | 665 (69.5) |
| Rural/small town | 292 (30.5) |
| Age of organization, mean (SD), y | 25.7 (21.9) |
| No. of MDs, mean (SD) | 239.9 (424.1) |
| No. of clinic sites, mean (SD) | 77.9 (266.6) |
| County HMO penetration, mean (SD), % | 33.1 (17.2) |
| Physicians who are primary care physicians, mean (SD), % | 50.9 (28.2) |
| Capital per MD, log, mean (SD) | 120,706.7 (359,996.0) |