At that time, he was transferred to the Medical Intensive Care Unit.
 The patient can be treated as an outpatient. 
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(ROOT (S (NP (DT The) (NN patient)) (VP (MD can) (VP (VB be) (VP (VBN treated) (PP (IN as) (NP (DT an) (NN outpatient)))))) (. .)))
( ( At ( that time ) ) ( , ( he ( ( was ( transferred ( to ( the ( Medical ( Intensive ( Care Unit ) ) ) ) ) ) ) . ) ) ) )
( ( The patient ) ( ( can ( be ( treated ( as ( an outpatient ) ) ) ) ) . ) )