1300-1399 Critical Access Hospitals (CAH) (eff 10/1/1997);
3300-3399  Children's hospitals (excluded from PPS) where TOB <> 72X;
S001-S999  Psychiatric unit (excluded from PPS)
T001-T999  Rehabilitation unit (excluded from PPS)
0001-0879  Short-term (general and specialty) hospitals (STH) where TOB <> 72X;
2000-2299  Long-term hospitals (excluded from PPS)
3025-3099  Rehabilitation hospitals (excluded from PPS)
4000-4499  Psychiatric hospitals (excluded from PPS)
1990-1999  Christian Science Sanatoria (hospital services)