Comparison of IHS Service Population and IHS Eligible Population—2004 Estimates
| IHS Area | IHS Service Population (Official) | IHS Eligible Population (STD Report) | Population Difference | % Difference |
| Aberdeen | 109,997 | 105,414 | -4,583 | -4.2% |
| Alaska | 116,186 | 112,077 | -4,109 | -3.5% |
| Albuquerque | 101,229 | 102,747 | 1,518 | 1.5% |
| Bemidji | 113,457 | 108,479 | -4,978 | -4.4% |
| Billings | 63,131 | 61,012 | -2,119 | -3.4% |
| California | 174,199 | 174,878 | 679 | 0.4% |
| Nashville | 110,921 | 110,906 | -15 | -0.01% |
| Navajo | 231,488 | 229,061 | -2,427 | -1.0% |
| Oklahoma City | 341,616 | 324,719 | -16,897 | -4.9% |
| Phoenix | 188,214 | 197,482 | 9,268 | 4.9% |
| Portland | 184,372 | 180,343 | -4,029 | -2.2% |
| Tucson | 34,641 | 34,922 | 281 | 0.8% |
| IHS Total | 1,769,451 | 1,742,040 | -27,411 | -1.5% |