| U.S. Region | States in HCUP | States not in NIS |
|---|---|---|
| West | AZ, CA, CO, HI, NV, OR, UT, WA, WY | AK, ID, MT, NM |
| Midwest | IA, IN, IL, KS, MI, MN, MO, NE, OH, SD, WI | ND |
| Northeast | CT, MA, NH, NJ, NY, RI, VT | ME, PA |
| South | AR, GA, FL, KY, NC, OK, SC, TN, TX, VA, WV | AL, DC, DE, LA, MS |