Medically Underserved Population (MUP)

Key facts

Designated by

HRSA Bureau of Health Workforce

Scoring tool

Index of Medical Underservice applied to the population group

Qualifying score

IMU of 62.0 or less

Alternative route

Exceptional MUP, on recommendation of the governor and local officials

What is a Medically Underserved Population?

A Medically Underserved Population is the population-level counterpart of a Medically Underserved Area (MUA). Instead of designating everyone in a county or set of census tracts, the Health Resources and Services Administration (HRSA) designates a defined group of people within that area who face barriers to primary care.

Typical barriers are economic (low income), cultural or linguistic (limited English proficiency). An MUP designation lets a city neighborhood or subgroup qualify even when the surrounding county has plenty of physicians on paper.

How MUP designations work

There are two routes to an MUP designation:

• Standard MUP: HRSA scores the population group with the Index of Medical Underservice (IMU), using data for that group, and a score of 62.0 or less qualifies.
• Exceptional MUP: a group that does not meet the IMU threshold can still be designated when the state governor and local officials recommend it, citing unusual local conditions that block access to care.

MUP vs MUA

Both designations use the same index and threshold, and HRSA publishes them together as MUA/P data. The difference is who is covered. An MUA covers all residents of a place. An MUP covers only the defined population group, so a clinic serving that group qualifies even if its neighbors in the same tract do not count as underserved.

Why MUPs matter

Serving an MUA or MUP is a core eligibility requirement for the Health Center Program, so MUP designations shape where urban Federally Qualified Health Centers and look-alikes can be established. MUPs also count as qualifying service areas for Conrad 30 physicians. When mapping underserved communities, analysts who look only at geographic MUAs will miss population-based designations, which are often the only designation in dense metropolitan areas.