Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Ppyr1NM_00891910090Y4    Npy4r    NYYR-D    601790
Ppyr1NW_04746910116
Ppyr1NM_03158110116
PPYR1AY2684329606NPY4R    601790
PPYR1NM_0059729606Y4    PP1    NPY4R    601790
Ppyr1NT_03959810090601790
PPYR1NT_0795429606601790

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

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Text2Knowledge ... Yong Huang 2002