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