Hello aspirant,

Though you belong to the OBC category but getting a seat in government college with this rank is difficult. The cutoff marks in Bihar is quite high. Last year for most of the colleges the cutoff was around 525+. So this year also the scenario will not change much. You can still try. But you can get a seat for MBBS in a private college. The chances are good. To predict those colleges which you can get based on your rank use the link provided.

http://www.medicine.careers360.com/neet-college-predictor
Hope this helps
Good luck! Thank you.