According to a recent case,
Quote Quoting Lester E. Cox Med. Ctrs. v. Richards, 252 S.W.3d 236 (Mo. App., S.D. 2008)
Under the doctrine of necessaries, a spouse may be held liable for necessary medical services provided to the other spouse if they maintain no separate assets. St. Luke's Episcopal-Presbyterian Hosp. v. Underwood, 957 S.W.2d 496, 499 (Mo.App. E.D. 1997).