Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
P2Y4NM_0025659606NRU    P2P    UNR    P2RY4    300038
P2Y4NM_02221610116Gpcr5-1    Gpr20   
P2Y4NM_03168010116P2ry4   
P2Y4X918529606300038
P2Y4Y1470510116
P2Y4Y1143310116

Search Again
* OMIM link based on symbol match for human and mouse.

Google

Text2Knowledge ... Yong Huang 2002