The javascript used on this site for creative design effects is not supported by your browser. Please note that this will not affect access to the content on this web site.
Skip Navigation
H H S Department of Health and Human Services
U.S. Department of Health and Human Services
Health Resources and Services Administration

A-Z Index  |  Questions?  |  Order Publications  |  HRSA Mobile

  • Print this
  • Email this

MUA/Ps: Index of Medical Underservice Data Tables

The Index of Medical Underservice (IMU) is applied to data on a service area to obtain a score for the area. The IMU scale is from 0 to 100, where 0 represents completely underserved and 100 represents best served or least underserved. 

Under the established criteria, each service area or population group found to have an IMU of 62.0 or less qualifies for designation as an Medically Underserved Area or Medically Underserved Population..

The IMU involves four variables - ratio of primary medical care physicians per 1,000 population, infant mortality rate, percentage of the population with incomes below the poverty level, and percentage of the population age 65 or over. The value of each of these variables for the service area is converted to a weighted value, according to established criteria. The four values are summed to obtain the area's IMU score.

 Table V1: Percentage of Population Below Poverty Level

In the left column find the range which includes the percentage of population below the poverty level for the area being examined. The corresponding weighted value found opposite in the right column, should be used in the formula for determining the IMU.

Percent Below Poverty

Weighted Value V1

025.1
0.1 - 2.024.6
2.1 - 4.023.7
4.1 - 6.022.8
6.1 - 8.021.9
8.1 - 10.021.0
10.1 - 12.020.0
12.1 - 14.018.7
14.1 - 16.017.4
16.1 - 18.016.2
18.1 - 20.014.9
20.1 - 22.013.6
22.1 - 24.012.2
24.1 - 26.010.9
26.1 - 28.09.3
28.1 - 30.07.8
30.1 - 32.06.6
32.1 - 34.05.6
34.1 - 36.04.7
36.1 - 38.03.4
38.1 - 40.02.1
40.1 - 42.01.3
42.1 - 44.01.0
44.1 - 46.00.7
46.1 - 48.00.4
48.1 - 50.00.1
50+0


Table V2: Percentage of Population Age 65 and Older 

In the left column find the range which includes the percentage of population age 65 and over for the area being examined. The corresponding weighted value, found opposite in the right column, should be used in the formula for determining the IMU.
 

Percent Age 65 and Over

Weighted Value V2

0-7.0
 
20.2
7.1 - 8.020.1
8.1 - 9.019.9
9.1 - 10.019.8
10.1 - 11.019.6
11.1 - 12.019.4
12.1 - 13.019.1
13.1 - 14.018.9
14.1 - 15.018.7
15.1 - 16.017.8
16.1 - 17.016.1
17.1 - 18.014.4
18.1 - 19.012.8
19.1 - 20.011.1
20.1 - 21.09.8
21.1 - 22.08.9
22.1 - 23.08.0
23.1 - 24.07.0
24.1 - 25.06.1
25.1 - 26.05.1
26.1 - 27.04.0
27.1 - 28.02.8
28.1 - 29.01.7
29.1 - 30.00.6
30+0


Table V3: Infant Mortality Rate

In the left column find the range which includes the infant mortality rate for the area being examined or the area in which it lies. The corresponding weighted value, found opposite in the right.
 

Infant Mortality RateWeighted Value V3
0-826.0
8.1 - 9.025.6
9.1 - 10.024.8
10.1 - 11.024.0
11.1 - 12.023.2
12.1 - 13.022.4
13.1 - 14.021.5
14.1 - 15.020.5
15.1 - 16.019.5
16.1 - 17.018.5
17.1 - 18.017.5
18.1 - 19.016.4
19.1 - 20.015.3
20.1 - 21.014.2
21.1 - 22.013.1
22.1 - 23.011.9
23.1 - 24.010.8
24.1 - 25.09.6
25.1 - 26.08.5
26.1 - 27.07.3
27.1 - 28.06.1
28.1 - 29.05.4
29.1 - 30.05.0
30.1 - 31.04.7
31.1 - 32.04.3
32.1 - 33.04.0
33.1 - 34.03.6
34.1 - 35.03.3
35.1 - 36.03.0
36.1 - 37.02.6
37.1 - 39.02.0
39.1 - 41.01.4
41.1 - 43.00.8
43.1 - 45.00.2
45.1 +0

 

 TABLE V4: Ratio of Primary Care Physicians per 1,000 Population 

In the left column find the range which includes the ratio of primary care physicians per 1,000 population for the area being examined. The corresponding weighted value found opposite in the right column, should be used in the formula for determining the IMU.

RatioWeighted Value V4
0 - .0500
.051 - .1000.5
.101 - .1501.5
.151 - .2002.8
.201 - .2504.1
.251 - .3005.7
.301 - .3507.3
.351 - .4009.0
.401 - .45010.7
.451 - .50012.6
.501 - .55014.8
.551 - .60016.9
.601 - .65019.1
.651 - .70020.7
.701 - .75021.9
.751 - .80023.1
.801 - .85024.3
.851 - .90025.3
.901 - .95025.9
.951 - 1.00026.6
1.001 - 1.05027.2
1.051 - 1.10027.7
1.101 - 1.15028.0
1.151 - 1.20028.3
1.201 - 1.25028.6
over 1.25028.7