When using bibtex, you should not mix up article number(six digits) with page number(three digit). Attached is an example of how to use article number.

The home page of RevTeX does not tell us how to use the article-number field. All the .bst files on the RevTeX website do not have this field defined. In principle, one can modify the file osajnl.bst to include a new field. But I have no time to do that yet. I will let you know when I get the urge to crack this code.