The HHS regions represent the states as follows: Region I (CT, ME, MA, NH, RI, VT), Region II (NJ, NY, PR, VI), Region III (DC, DE, MD, VA, WV, PA), Region IV (KY, TN, NC, SC, GA, AL, MS, FL) Region V (MN, WI, MI, IL, IN, OH), Region VI (NM, TX, OK, AR, LA), Region VII (NE, IA, KS, MO), Region VIII (ND, SD, MT, WY, CO, UT), Region IX (CA, NV, AZ, HI, GU, AS, MP, PW, FM, MH), Region X (AK, WA, OR, ID). a Proportion of positive tests (excluding M. gordonae) identified as MAC. b Proportion of positive tests (excluding M. gordonae) identified as M. abscessus