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175. Health Maintenance Organizations (HMOs)

[As of January 1, except as noted (9.1 represents 9,100,000). An HMO is a prepaid health plan delivering comprehensive care to members through designated providers, having a fixed periodic payment for health care services, and requiring members to be in a plan for a specified period of time (usually 1 year). A group HMO delivers health services through a physician group that is controlled by the HMO unit or contracts with one or more independent group practices to provide health services. An individual practice association (IPA) HMO contracts directly with physicians in independent practice, and/or contracts with one or more associations of physicians in independent practice, and/or contracts with one or more multispecialty group practices. Data are based on a census of HMO's. NORTHEAST: Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, and Pennsylvania. MIDWEST: Ohio, Indiana, Illinois, Michigan, Wisconsin, Minnesota, Iowa, Missouri, North Dakota, South Dakota, Nebraska, and Kansas. SOUTH: Delaware, Maryland, District of Columbia, Virginia, West Virginia, North Carolina, South Carolina, Georgia, Florida, Kentucky, Tennessee, Alabama, Mississippi, Arkansas, Louisiana, Oklahoma, and Texas. WEST: Montana, Idaho, Wyoming, Colorado, New Mexico, Arizona, Utah, Nevada, Washington, Oregon, California, Alaska, and Hawaii]

 
NUMBER OF PLANS NUMBER OF PLANS NUMBER OF PLANS ENROLLMENT (mil.) ENROLLMENT (mil.) ENROLLMENT (mil.)
Model type
MODEL TYPE 1980 1 1985 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 1980 1985 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
(June 30) (Dec. 31) (June 30) (Dec. 31)
 
    Total 235 478 572 553 555 551 540 550 628 651 651 643 Total 9.1 21.0 33.0 34.0 36.1 38.4 42.2 46.2 52.5 58.8 64.8 81.3
Model type: Model type:
  I.P.A 97 244 360 346 340 332 319 323 366 284 317 309 I.P.A 1.7 6.4 13.7 13.6 14.7 15.3 16.1 17.4 21.7 21.0 24.8 32.8
  Group 138 234 212 168 166 150 117 107 122 109 122 126 Group 7.4 14.6 19.3 17.1 16.5 15.4 13.6 12.9 13.5 10.8 13.1 15.9
  Mixed (NA) (NA) (NA) 39 49 69 104 120 140 258 212 208 Mixed (NA) (NA) (NA) 3.3 4.9 7.7 12.5 15.9 17.2 27.0 26.9 32.6
 
Region:
  Northeast 55 81 115 116 111 102 101 99 111 110 107 110 Federal program: 2
  Midwest 72 157 160 157 165 169 159 154 181 184 185 179 Medicaid 0.3 0.6 3 1.2 1.4 1.7 1.7 2.6 3.5 4.7 5.5 7.8 10.4
  South 45 141 176 163 161 167 173 190 217 236 237 239 Medicare 0.4 1.1 1.8 2.0 2.2 2.2 2.5 2.9 3.7 4.8 5.7 6.5
  West 63 99 121 117 118 113 107 107 119 121 122 115


NA Not available.
1 1980-98 excludes enrollees participating in open-ended plans; 1999, includes open-ended enrollment.nn
2 Refers to enrollment by medicaid or medicare beneficiaries, where the program contracts directly with the HMO to pay the appropriate annual premium.
3 Enrollment for 1990 as of June 30.

Source: InterStudy Publications, St. Paul, MN, The InterStudy Competitive Edge, annual (copyright).

http://www.hmodata.com/



https://allcountries.org/uscensus/175_health_maintenance_organizations_hmos.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

Copyright © 2006 Photius Coutsoukis and Information Technology Associates, all rights reserved.