Hi aspirant,

With 423 Marks in neet examination you should apply for counseling in these colleges of Himachal pradesh:-

1. Dr. YS Parmar Govt. Medical College, Nahan
2. Pt. Jawahar Lal Nehru Government Medical College, Chamba
3. Sh. Lal Bahadur Shastri Government Medical College, Mandi

This information is based on previous years cutoff and the cutoff marks change every year. It's depends upon number of students that appeared in examination, number of seats available in colleges, difficulties of question paper, previous years cutoff trends, etc.

You can use neet college predictor to know which college you may get with your marks. That is mentioned below:-

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

Hope this helpful. All the best.