Hello, I am from AP and have secured 423 marks in neet 2019. Is there any chance for a good government college?

You haven't mentioned your Category. Neverthless, AP State Government Medical Colleges are categorised into SVU, AU and OU areas. You need to be a local for that area to claim its local quota benefits. However, the cut offs for various areas in 2018 :

General category:
SVU: 458
AU: 473
OU: 454

For OBC:
SVU: 449
AU: 459
OU: 433

For SC:
SVU:365
AU: 380
OU: 375

For ST:
AU: 331


Cut off changes every year and is dependant on various factors like no.of seats available, no.of candidates apearing for the exam, top NEET score and difficulty of the exam. If you can help us with your Category and the area you are local to, we can help you. Further, you can visit our page to check the cut offs for various colleges under yoir Category.