Do I need high school chemistry for pre med?

First, lots of people are rejected by NYU, and none of them are losers.
Second, if you don’t do the coursework in high school-specifically chemistry-you are putting yourself at a serious disadvantage as a premed in college. It’s really that competitive.
Please, re-think your college search and planned field of study until you’re fully prepared for college level course work in the required courses(eg chemistry) because based on what you’ve written, you aren’t and won’t be prepared by the time you enroll in college. There are plenty of great colleges with solid pre-med programs; it appears that you’ve fixed your sights almost exclusively on one very selective school and are hoping to somehow glide past certain pre-med requirements.
Based on your previous posts, it may be in your interest to take a gap year, so you can complete the coursework necessary for pre-med, and take the time to find a set of colleges which you are interested in and can afford.
There are no shortcuts as a pre-med; everything counts from the beginning of freshmen year. And you shouldn’t shortcut yourself in your college search, which is what it appears you are doing. NYU is an awesome school
https://www.nyu.edu/admissions/undergraduate-admissions/nyu-facts.html
but those incoming first year stats are pretty remarkable; you definitely need backup schools. So take your time and find schools that are right for you.