NCHSURCodes2013.xlsx (175 KB)

Reference: https://www.cdc.gov/nchs/data/series/sr_02/sr02_166.pdf
Column G, H, I are urban-rural classification codes in 2013, 2006, and 1990:
1-Large central metro
2-Large fringe metro 
3-Medium metro 
4-Small metro 
5-Micropolitan 
6-Noncore 
According to Figure 1 of the reference, 1, 2, 3, and 4 are considered urban; 5 and 6 are considered rural.