He was brought in by  his cousin for concern for GIB, and currently denies that he had any hematemesis but instead endorses hematochezia.
 the patient has hematochezia
(ROOT (S (S (NP (PRP He)) (VP (VBD was) (VP (VBN brought) (PRT (RP in)) (PP (IN by) (NP (PRP$ his) (NN cousin))) (PP (IN for) (NP (NP (NN concern)) (PP (IN for) (NP (NNP GIB)))))))) (, ,) (CC and) (S (ADVP (RB currently)) (VP (VBZ denies) (SBAR (IN that) (S (NP (PRP he)) (VP (VBD had) (NP (NP (DT any) (NN hematemesis)) (CC but) (S (ADVP (RB instead)) (VP (VBZ endorses) (NP (NN hematochezia)))))))))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBZ has) (NP (NN hematochezia)))))
( ( ( ( ( He ( was ( ( ( brought in ) ( by ( his cousin ) ) ) ( for ( concern ( for GIB ) ) ) ) ) ) , ) and ) ( currently ( denies ( that ( he ( had ( ( ( any hematemesis ) but ) ( instead ( endorses hematochezia ) ) ) ) ) ) ) ) ) . )
( ( the patient ) ( has hematochezia ) )