The Medically Underserved Areas/Populations (MUA/P) designations are based on the Index of Medical Underservice (IMU) from the Health Resources and Services Administration (HRSA). IMU is calculated based on four criteria:

• Population to provider ratio;
• Percent of the population below the federal poverty level;
• Percent of the population over age 65; and
• Infant mortality rate.

Most licensed physicians in Detroit are located at one of the three major health system hospitals which leaves an absence of primary care and family doctors in nearly all of Detroit’s neighborhoods. Areas well covered by hospitals also highlight due to high infant mortality rates such as 48201 (Detroit Medical Center) and 48202 (Henry Ford Hospital).