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PL_UR_CAT4 is a four category urban-rural designation for the patient's county of residence.
- Starting in the 2024 HCUP databases, the categorization is a simplified adaptation of the 2023 version of the Urban Influence Codes (UIC) (see PL_UIC2023).
- In HCUP databases between 2014 and 2023, the categorization is a simplified adaptation of the 2013 version of the UIC.
- In the HCUP databases prior to 2014, the categorization is a simplified adaptation of the 2003 version of the UIC.
The categories of the UIC are combined into four broader categories that differentiate between large and small metropolitan, micropolitan, and a non-urban residual as follows:
| PL_UR_CAT4 |
| 2023 UIC Value |
| Value |
Description |
Value |
Description |
| 1 |
Large metropolitan areas with at least 1 million residents |
1 |
Large metro (in a metro area with at least 1 million residents) |
| 2 |
Small metropolitan areas with less than 1 million residents |
4 |
Small metro (in a metro area with fewer than 1 million residents) |
| 3 |
Micropolitan areas |
2 |
Micropolitan, adjacent to a large metro area |
| 3 |
Micropolitan areas |
5 |
Micropolitan, adjacent to a small metro area |
| 3 |
Micropolitan areas |
7 |
Micropolitan, not adjacent to a metro area |
| 4 |
Not metropolitan or micropolitan |
3 |
Noncore, adjacent to a large metro area |
| 4 |
Not metropolitan or micropolitan |
6 |
Noncore, adjacent to a small metro area |
| 4 |
Not metropolitan or micropolitan |
8 |
Noncore, not adjacent to a metro area and contains a town of at least 5,000 residents |
| 4 |
Not metropolitan or micropolitan |
9 |
Noncore, not adjacent to a metro area and does not contain a town of at least 5,000 residents |
| PL_UR_CAT4 |
| 2003 and 2013 UIC Value |
| Value |
Description |
Value |
Description |
| 1 |
Large metropolitan areas with at least 1 million residents |
1 |
Metro - Large metro area of 1 million residents or more |
| 2 |
Small metropolitan areas with less than 1 million residents |
2 |
Metro - Small metro area of less than 1 million residents |
| 3 |
Micropolitan areas |
3 |
Non-Metro - Micropolitan adjacent to large metro |
| 3 |
Micropolitan areas |
5 |
Non-Metro - Micropolitan adjacent to small metro |
| 3 |
Micropolitan areas |
8 |
Non-Metro - Micropolitan not adjacent to a metro area |
| 4 |
Not metropolitan or micropolitan |
4 |
Non-Metro - Noncore adjacent to large metro |
| 4 |
Not metropolitan or micropolitan |
6 |
Non-Metro - Noncore adjacent to small metro with own town |
| 4 |
Not metropolitan or micropolitan |
7 |
Non-Metro - Noncore adjacent to small metro no own town |
| 4 |
Not metropolitan or micropolitan |
9 |
Non-Metro - Noncore adjacent to micro with own town |
| 4 |
Not metropolitan or micropolitan |
10 |
Non-Metro - Noncore adjacent to micro with no own town |
| 4 |
Not metropolitan or micropolitan |
11 |
Non-Metro - Noncore not adjacent to metro or micro with own town |
| 4 |
Not metropolitan or micropolitan |
12 |
Non-Metro - Noncore not adjacent to metro or micro with no own town |
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