hello aspirant,

All india ranks are not decided through category.there are seperate category ranks for category.According to https://medicine.careers360.com/articles/neet-result-marks-vs-rank

520 marks would fetch you rank around 37780-38736 .

note that every year cutoffs change due to many factors like total students appearing for exam,difficulty level of paper,previous year analysis etc.

hope this helps,

thankyou.